foodZipper

Your genes. Your food. Zipped together.
45 SNPs analyzed · 22 variants found · 16 protocols active
MAO-A R297R (hemizygous)
hemi · Slow neurotransmitter cleanup
Sardines, salmon, spinach, pumpkin seeds
Riboflavin (B2), magnesium, vitamin C
Blood sugar stability
all profiles · All enzymes need steady glucose — crashes amplify every vulnerability
Basmati rice, sweet potatoes, oats, quinoa
Complex carbs + protein + healthy fat at every meal
MTHFR A1298C
+/+ · May affect BH4 recycling — linked to serotonin, dopamine, melatonin synthesis (lower confidence than C677T)
Lentils, chickpeas, spinach, asparagus
Natural folate, B6
MTRR
A66G (+/-), A664A (+/-) · Sluggish B12 recycling
Salmon, sardines, eggs, beef
B12 from whole food (food-first approach)
FADS1/FADS2 — moderate slow omega-3 conversion
Δ5 (+/-), Δ6 (+/-) · Moderately reduced conversion of plant omega-3 (ALA) to EPA/DHA — roughly 30-50% decrease in long-chain omega-3 output
Preformed EPA/DHA (bypass FADS entirely): wild salmon, sardines, mackerel, anchovies
Preformed EPA and DHA from marine or algae sources; magnesium and zinc as desaturase cofactors for whatever conversion you still have
DAO — moderately reduced histamine clearance
Thr16Met (+/+), His645Asp (+/-) · Moderately reduced DAO activity — tolerance for high-histamine foods is narrower than average, especially when multiple trigger foods appear in the same meal
Lower-histamine emphasis: freshly-cooked meat, poultry, fish (not aged or leftover); most fresh vegetables (avoiding spinach, tomato
Copper (DAO cofactor); vitamin C (natural antihistamine and DAO-supportive); quercetin (mast cell stabilizer); vitamin B6 (P5P form); watch zinc supplementation (excess blocks copper)
CYP24A1
+/+ · Vitamin D catabolism may run reduced — context for hypercalciuria and calcium-oxalate stone risk
Steady fluid intake (water as the default beverage, target pale-yellow urine). Pair calcium-rich foods (yogurt, kefir, sardines with bones
Hydration, balanced calcium intake, careful vitamin D dosing
CLDN14
+/- · GWAS-supported elevated kidney stone risk (OR ~1.25)
Hydration is the single highest-leverage variable for stone prevention — keep urine pale yellow throughout the day. Pair calcium-rich and oxalate-rich foods at the same meal. Citrus (lemons, limes — citrate inhibits calcium-oxalate crystallization) added to water is a low-cost daily move.
Hydration, calcium-oxalate pairing strategy
VDR Taq
+/+ · Reduced vitamin D receptor efficiency — may intersect with dopamine biology (emerging evidence)
Salmon, sardines, eggs/yolks, sun-exposed mushrooms
Vitamin D from food, omega-3
SOD2 A16V
+/- · Altered mitochondrial antioxidant defense
Blueberries, blackberries, dark chocolate 70%+, walnuts
Antioxidants — vitamin C, E, selenium, polyphenols
NAT2
R197Q (+/-), I114T (+/-) · Slow acetylator — reduced phase II detox
Broccoli, brussels sprouts, cauliflower, cabbage
Cruciferous vegetables, clean protein
SHMT1 C1420T
+/- · Folate cycle interconversion may be reduced
Spinach, lentils, asparagus, eggs
Natural folate, glycine, serine
HFE C282Y (carrier)
+/- · C282Y carrier — one copy. Typically no clinical significance alone, but worth knowing for family context.
No restrictions based on genotype alone
Awareness only
BCMO1 reduced beta-carotene conversion
A379V (+/-) · Mildly to moderately reduced conversion of plant beta-carotene to active vitamin A — roughly 32% decrease
Preformed vitamin A (doesn't require BCMO1): beef or chicken liver (one of the densest food sources), cod liver oil, eggs (yolk especially), butter from grass-fed cows
Preformed vitamin A (retinol) from animal sources; iron, zinc, niacin, riboflavin as enzyme cofactors; dietary fat with plant sources of beta-carotene
HNMT — mildly reduced histamine clearance
Thr105Ile (+/-) · Mildly reduced HNMT activity
Methylation-supportive daily: eggs (choline), leafy greens (folate), lentils, asparagus
Natural folate (supports methylation, which HNMT depends on); B12; betaine (from beets, spinach); choline (eggs, liver); magnesium; quercetin and vitamin C for overall histamine load
HDC Glu644/Glu644 — elevated histamine production signal
Glu644Asp (+/+) · Elevated baseline histamine production capacity — on its own this is informational, but it amplifies the clinical picture when paired with slow DAO or HNMT
The food strategy doesn't meaningfully change based on HDC alone — what changes is your margin before symptoms appear. Quercetin-rich foods (apples, onions, capers, red onions)
Quercetin (mast cell stabilizer) and vitamin C (broad anti-histamine support); EGCG from green tea is a natural HDC inhibitor — modest but real; B6 (the PLP cofactor HDC uses) is already covered by the broader engine; magnesium for overall mast cell stability
hemi MAO-A R297R (hemizygous)
Emotions hit hard and take a long time to fade
Obsessive thought loops — the same thought circling for hours
Irritability that feels disproportionate to the trigger
Difficulty letting go of arguments or perceived slights
Sleep onset problems — mind won't quiet down
Sensitivity to stress that others seem to shake off easily
Feeling "wired" or restless when cooped up without physical activity
Serotonin and dopamine aren't clearing at normal speed. The signal stays active longer than it should. You're not overreacting — your brain is literally processing longer than someone without this variant.
Sardines, salmon, spinach, pumpkin seeds, almonds, eggs, mushrooms
MAO-A is a flavoprotein — it requires B2 (riboflavin) as a cofactor to function. Without adequate B2, the enzyme can't work even at its reduced capacity. Magnesium supports neurotransmitter balance downstream. Vitamin C supports dopamine-to-norepinephrine conversion.
Nutrients: Riboflavin (B2), magnesium, vitamin C · Timing: Morning + midday · Track: Rumination, anxiety, irritability, mood, sleep
+/+ MTHFR A1298C
Mood instability — ups and downs without clear triggers
Sleep that doesn't feel restorative even when you get enough hours
Low motivation or drive that comes and goes
Anxiety that's hard to pin to a specific cause
Afternoon or evening mood dips
This variant may affect the recycling of BH4 — a cofactor your body needs to produce serotonin, dopamine, and melatonin. When BH4 recycling is less efficient, the production capacity for these neurotransmitters can be reduced. This is an area of active research and lower confidence than some other gene-nutrient links.
Lentils, chickpeas, spinach, asparagus, brussels sprouts, turkey, chicken, salmon, sweet potatoes, bananas
A1298C may reduce BH4 recycling — a cofactor needed for serotonin, dopamine, and melatonin production. Natural folate supports this recycling. Tryptophan-rich foods (turkey, chicken) maximize the raw material for serotonin when production capacity is reduced.
Nutrients: Natural folate, B6 · Timing: Flexible — folate + B6 throughout the day · Track: Mood, sleep, anxiety, motivation
A66G (+/-), A664A (+/-) MTRR
Fatigue and brain fog despite "normal" B12 blood tests
Difficulty concentrating or staying mentally sharp
Low energy that doesn't respond to more sleep
Mood changes — especially flat or low affect
MTRR keeps vitamin B12 in its active form. When it runs slow, your total B12 can look normal on a blood test while the active form is actually low. This affects homocysteine recycling and downstream methylation — including neurotransmitter production.
Salmon, sardines, eggs, beef, tuna
MTRR keeps B12 in its active form so methionine synthase can recycle homocysteine. When MTRR runs slow, B12 can look normal on a blood test while the active form is actually low. Whole food B12 sources provide naturally occurring active forms.
Nutrients: B12 from whole food (food-first approach) · Timing: Flexible — B12 throughout the day · Track: Energy, brain fog, focus, mood
Δ5 (+/-), Δ6 (+/-) FADS1/FADS2 — moderate slow omega-3 conversion
Fish oil or flax supplementation doesn't seem to help much
Inflammatory markers (CRP, joint stiffness) stay elevated despite a "good" diet
Omega-3 blood index stays low despite regular plant or fish intake
Dry skin, dry eyes, or slow wound healing
Low mood or cognitive fog that doesn't fully respond to other interventions
Strong family history of cardiovascular disease or Alzheimer's
FADS1 encodes delta-5 desaturase and FADS2 encodes delta-6 desaturase — the two enzymes that together convert plant-based omega-3 (alpha-linolenic acid, ALA, from flaxseed, chia, walnuts) into the long-chain forms your brain and heart actually use (EPA and DHA). FADS2 is the rate-limiting gatekeeper upstream; FADS1 does the critical downstream step. Common variants in both genes reduce enzymatic activity: rs174537 T allele on FADS1 (~30-40% of Europeans carry at least one copy) reduces EPA production by roughly 38% at TT; rs1535 G allele on FADS2 (~30-40% frequency) reduces delta-6 activity similarly. Effects are additive across the two SNPs — total risk allele count across both predicts conversion capacity. The clinical consequence: people with slow variants relying on plant omega-3 sources often don't reach therapeutic EPA/DHA levels no matter how much flax or chia they eat. The fix is simple — preformed EPA and DHA from fatty fish, fish oil, or algae-based supplements completely bypass the conversion step. This is one of the cleanest gene-diet interactions known: the problem is metabolic conversion, not absorption or need.
Preformed EPA/DHA (bypass FADS entirely): wild salmon, sardines, mackerel, anchovies, herring, trout — fatty cold-water fish are the cleanest source. Canned sardines and canned wild salmon are cheap, shelf-stable, and nutritionally identical to fresh. Algae-based omega-3 supplements (for vegetarian/vegan or fish-averse) deliver DHA and some EPA preformed. Fish oil or krill oil supplements if diet alone is impractical. Plant ALA sources (still valuable for overall diet, not relied on for EPA/DHA): ground flaxseed, chia seeds, walnuts, hemp seeds. Cofactor support for the conversion you still have: pumpkin seeds, oysters (zinc); leafy greens, dark chocolate, nuts (magnesium).
You carry reducing variants across both desaturase steps (or homozygous on one). Plant omega-3 sources still contribute, but less efficiently than in people without these variants. Including some preformed EPA/DHA — a couple servings of fatty fish per week or a modest fish oil supplement — easily fills the gap and doesn't require the conversion steps at all.
Nutrients: Preformed EPA and DHA from marine or algae sources; magnesium and zinc as desaturase cofactors for whatever conversion you still have · Timing: Fatty fish 2-3× per week OR 500mg-1g combined EPA+DHA daily. Plant omega-3 (flax, chia, walnuts) still useful for overall diet — just not sufficient as your sole strategy. · Track: Omega-3 index (blood test, HS-Omega-3 or similar — target 8%+); CRP or hsCRP (inflammation marker); triglycerides (often improve with adequate EPA/DHA); subjective: joint comfort, skin quality, mood stability
Thr16Met (+/+), His645Asp (+/-) DAO — moderately reduced histamine clearance
Flushing, headache, or nasal congestion after wine, aged cheese, or cured meats
Worse reactions to leftovers than to freshly-cooked versions of the same food
Itchy skin, hives, or digestive distress with no obvious allergy
Migraines that track with specific foods (red wine, chocolate, aged cheese, fermented foods)
Heartburn, bloating, or loose stools after high-histamine meals
Symptoms that worsen during allergy season and when histamine-rich foods are eaten together
DAO (diamine oxidase, encoded by the AOC1 gene) is the enzyme in your gut lining that breaks down histamine from food before it enters circulation. When DAO is slow, dietary histamine can exceed clearance capacity and spill into the bloodstream — producing the symptoms of histamine intolerance even without a true allergy. Four SNPs are documented to reduce DAO activity: rs10156191 (Thr16Met) reduces intrinsic enzyme activity; rs1049793 (His645Asp) is the most impactful functional variant, reducing serum DAO by 34% at heterozygotes and 49% at homozygotes; rs1049742 (Ser332Phe) is rarer but meaningful when present; rs2052129 is a promoter variant that reduces how much DAO your body transcribes in the first place. Effects stack additively. Important chip-coverage note: three of the four canonical DAO SNPs were dropped from 23andMe's v5 chip (used since 2017). If you're on v5, most of the DAO analysis shows as "not tested" — this is the chip's limitation, not missing information about you. Older 23andMe kits (v3, v4), AncestryDNA, or whole-genome sequencing cover all four. DAO is copper-dependent — copper deficiency or excess zinc (which blocks copper absorption) can worsen slow DAO function regardless of genotype. Vitamin C and quercetin are supportive; quercetin is also a natural mast cell stabilizer.
Lower-histamine emphasis: freshly-cooked meat, poultry, fish (not aged or leftover); most fresh vegetables (avoiding spinach, tomato, eggplant, avocado in sensitive cases); rice, quinoa, oats, potatoes; apples, pears, blueberries, mango; fresh herbs (parsley, basil, cilantro); olive oil, coconut oil, butter. Histamine-lowering probiotic strains if fermented foods are desired: Bifidobacterium infantis, B. lactis, B. longum. Copper sources: oysters, beef liver, cashews, shiitake mushrooms, dark chocolate. Vitamin C + quercetin natural combos: apples + onions, red bell peppers, broccoli, kiwi, capers. Foods to rotate or reduce rather than eliminate: aged cheese (parmesan, cheddar, blue), cured meats (salami, prosciutto, bacon), fermented foods (sauerkraut, kimchi, kombucha, miso — especially long-fermented), red wine and beer, vinegar, soy sauce, smoked/canned fish (except very fresh), chocolate (in excess), leftovers more than 24 hours old. Histamine liberators (may trigger release even if low-histamine themselves): citrus, strawberries, pineapple, tomato, shellfish.
You carry reducing variants at multiple DAO sites. At this tier, symptoms are often intermittent — tied to specific days, specific combinations, or accumulation rather than any single food. Common patterns: wine + aged cheese + cured meats together produces a reaction that any one alone would not; leftovers more than 24 hours old bother you more than fresh versions of the same meal; allergy season amplifies food-histamine sensitivity (because your baseline histamine load is already higher). The solution is load management, not elimination. Cook fresh, freeze leftovers within a day, pay attention to which combinations produce reactions.
Nutrients: Copper (DAO cofactor); vitamin C (natural antihistamine and DAO-supportive); quercetin (mast cell stabilizer); vitamin B6 (P5P form); watch zinc supplementation (excess blocks copper) · Timing: Fresh over aged when you have the choice; watch meal-level histamine stacking; freeze leftovers rather than storing in the fridge for days. · Track: Flushing, headaches, nasal congestion, itchy skin or hives, digestive symptoms — and specifically WHEN these occur (what you ate, how fresh it was, whether you stacked multiple trigger foods). Pattern-matching over days and meals is more useful than any single lab. A food-symptom journal for 2 weeks tells you more than most blood tests.
+/+ CYP24A1
History of calcium-oxalate kidney stones
Vitamin D blood levels that run unexpectedly high or that respond strongly to small doses
Family history of kidney stones or hypercalciuria
Episodes of hypercalcemia or "high calcium" on routine bloodwork
Burning urination or bone pain without infection
Symptoms appearing or worsening after vitamin D supplementation
CYP24A1 is the enzyme that breaks down active vitamin D (1,25-dihydroxyvitamin D) — closing the loop on vitamin D signaling. When CYP24A1 runs at reduced capacity, active vitamin D persists longer than it should, which can drive hypercalciuria (excess calcium in urine) and increase calcium-oxalate stone risk. Loss-of-function CYP24A1 mutations cause idiopathic infantile hypercalcemia and can cause adult-onset hypercalciuric nephrolithiasis. The common variant rs17216707 has GWAS associations with kidney stone disease and serum 25(OH)D levels. This is risk context, not a diagnosis — many people with this variant never form stones. But combined with high vitamin D supplementation, low fluid intake, or other oxalate-pathway flags in your profile, it shifts where the watch line sits.
Steady fluid intake (water as the default beverage, target pale-yellow urine). Pair calcium-rich foods (yogurt, kefir, sardines with bones, tofu, leafy greens) with high-oxalate foods (spinach, beets, almonds, sweet potatoes) at the same meal — calcium binds oxalate in the gut so less reaches the kidneys.
CYP24A1 closes the loop on vitamin D signaling by breaking down active 1,25-dihydroxyvitamin D. Reduced activity means active vitamin D persists longer, which can drive calcium absorption and urinary calcium excretion — the upstream condition for calcium-oxalate stones. This is risk context, not a diagnosis. The food strategy is hydration + calcium-pairing, not calcium restriction. If you take vitamin D supplements, discuss dosing with a clinician given this variant.
Nutrients: Hydration, balanced calcium intake, careful vitamin D dosing · Timing: Pair calcium with oxalate-rich foods at the same meal · Track: Stone history, urinary frequency, vitamin D dosing response
+/- CLDN14
History of calcium kidney stones
Family members with recurrent kidney stones
Stones that recur despite normal-looking lab work
Lower bone mineral density alongside stone history
Sensitivity to dehydration — stones tend to appear after low-fluid periods
CLDN14 codes for claudin-14, a protein that helps form tight junctions in the thick ascending limb of the kidney. Claudin-14 affects how much calcium is reabsorbed back into circulation versus excreted in urine — when expression is shifted by genetic variation, more calcium stays in urine, which raises calcium-oxalate stone risk. The rs219780 C allele has a well-replicated GWAS association with kidney stones, with an odds ratio around 1.25 in the original Thorleifsson 2009 study. This is one of the cleanest polygenic stone-risk signals in the consumer-DNA space. The same variant has weaker associations with bone mineral density. Watch context, not a diagnosis: most CC carriers do not form stones. But combined with hypercalciuria, low fluid intake, or convergent oxalate-pathway flags, the elevated risk is real and food strategy matters more.
Hydration is the single highest-leverage variable for stone prevention — keep urine pale yellow throughout the day. Pair calcium-rich and oxalate-rich foods at the same meal. Citrus (lemons, limes — citrate inhibits calcium-oxalate crystallization) added to water is a low-cost daily move.
CLDN14 (claudin-14) regulates calcium reabsorption in the kidney. The rs219780 C allele has a well-replicated GWAS association with kidney stones (OR ~1.25, Thorleifsson 2009). This is risk context, not a diagnosis — most carriers do not form stones. But hydration and calcium-pairing have strong evidence as preventive strategies regardless, and they cost nothing.
Nutrients: Hydration, calcium-oxalate pairing strategy · Timing: Distribute fluids evenly across the day — large gulps once a day are less protective than steady intake · Track: Stone history, urinary frequency, hydration adherence
+/+ VDR Taq
Low energy, especially in winter or with limited sun exposure
Mood changes that track with seasons
Feeling noticeably better after time outdoors
Immune system that seems to catch everything going around
Muscle or joint aches without clear cause
Your vitamin D receptor may work less efficiently. Since VDR is expressed in virtually every tissue — including the brain — this can affect energy, immune function, and mood. Emerging research suggests it may also intersect with dopamine biology, though this is not yet fully established. Indirect oxalate context: VDR also regulates active calcium absorption in the duodenum, which influences how much free luminal calcium is available to bind dietary oxalate before absorption. The VDR-stone literature is mixed across populations — this is context, not a diagnostic marker.
Salmon, sardines, eggs/yolks, sun-exposed mushrooms, tuna
With reduced receptor efficiency, the strategy is to maximize food-based vitamin D3, which comes packaged with cofactors like K2 and magnesium. Omega-3 (especially DHA) has been shown to support VDR gene expression.
Nutrients: Vitamin D from food, omega-3 · Timing: Flexible · Track: Energy, mood, immune function
+/- SOD2 A16V
Slower recovery after intense exercise
Feeling worse, not better, after very hard workouts
General inflammation or achiness
Fatigue that gets worse with overtraining
Feeling better with moderate exercise than high intensity
SOD2 is your primary mitochondrial antioxidant. This variant affects how efficiently the enzyme gets imported into the mitochondria. Less SOD2 inside means more oxidative stress accumulates during high-energy activities — your recovery window matters more than most people's. Indirect oxalate context: calcium oxalate crystals generate reactive oxygen species in renal tissue. Reduced SOD2 capacity can amplify oxalate-related oxidative burden if oxalate handling is also stressed elsewhere in your profile — context only, not a stand-alone oxalate marker.
Blueberries, blackberries, dark chocolate 70%+, walnuts, turmeric, brazil nuts, sweet potatoes
SOD2 is your mitochondrial antioxidant. This variant reduces how much reaches the mitochondria. Polyphenols (blueberries, dark chocolate) activate the Nrf2 pathway, which upregulates your body's own antioxidant production. Selenium (brazil nuts) supports glutathione peroxidase, which works alongside SOD2.
Nutrients: Antioxidants — vitamin C, E, selenium, polyphenols · Timing: Flexible — throughout the day · Track: Recovery, inflammation, wellbeing
R197Q (+/-), I114T (+/-) NAT2
Sensitivity to processed foods — bloating, sluggishness, skin reactions
Feeling better on a "clean" whole-food diet than average
Digestive issues with cured or heavily processed meats
Skin problems that seem diet-related
Sensitivity to chemical smells or environmental exposures
NAT2 controls a phase II liver detox pathway called acetylation. Running slow means your body clears certain chemical compounds — from food processing, grilling, and environmental exposure — more slowly than fast acetylators. This isn't dangerous at normal exposure levels, but it means clean eating isn't a luxury for you — it's a real advantage.
Broccoli, brussels sprouts, cauliflower, cabbage, kale, grass-fed beef, wild-caught fish, pasture-raised eggs
Cruciferous vegetables contain sulforaphane, which activates the Nrf2 pathway and upregulates alternative phase II detox enzymes — compensating for slower NAT2 acetylation. Clean protein sources avoid the heterocyclic amines from processed and charred meats that slow acetylators handle poorly.
Nutrients: Cruciferous vegetables, clean protein · Timing: Flexible — cruciferous daily · Track: Digestion, skin, processed food tolerance
+/- SHMT1 C1420T
Low energy that tracks with folate-poor diet
Brain fog or difficulty concentrating
Feeling run down more easily than others
Mood changes that improve with leafy greens and protein
SHMT1 feeds raw material into the folate cycle upstream of MTHFR. When it runs slow, less 5,10-methylene-THF reaches MTHFR — so even if MTHFR is working normally, the supply chain is reduced. This is a supporting player, not a lead, but it matters when other folate pathway genes are also firing. One-carbon/glycine context only for oxalate: SHMT1 sits in glycine/serine metabolism. AGXT is the direct glyoxylate-to-glycine enzyme — SHMT1 is not a direct oxalate-pathway gene. Mention here only because glycine-cycle context can overlap.
Spinach, lentils, asparagus, eggs, turkey, salmon, bone broth
SHMT1 converts serine + THF into glycine + 5,10-methylene-THF, which feeds directly into MTHFR. When this step runs slow, less raw material reaches the folate cycle. Glycine-rich foods (bone broth, eggs) and folate-rich foods support both sides of the reaction.
Nutrients: Natural folate, glycine, serine · Timing: Flexible — throughout the day · Track: Energy, mood, folate status
+/- HFE C282Y (carrier)
Unexplained fatigue that doesn't match sleep quality
Joint aches, particularly in the hands, knees, or hips
Feeling worse after iron-rich meals (beef, liver, iron-fortified cereals)
Family history of hemochromatosis, iron issues, or "needing to donate blood"
Previous blood test showing elevated ferritin or transferrin saturation
Skin tone changes — gradual bronzing or darkening (uncommon, later-stage)
HFE codes for a protein that helps regulate how much iron your body absorbs from food, by signaling through the hormone hepcidin. Variants reduce this regulation — the body keeps absorbing iron even when stores are adequate. Over years, iron can accumulate in the liver, joints, heart, and pancreas. This is the one gene on your profile where dietary changes should follow clinical testing, not precede it. A simple ferritin + transferrin saturation panel tells you whether iron is actually accumulating. Until that's tested, the right posture is awareness, not restriction.
No restrictions based on genotype alone
Being a C282Y carrier means you have one variant copy of HFE. This is common — about 1 in 10 people of Northern European descent. It does not typically cause iron overload on its own. It matters mainly for family planning: if your partner is also a carrier, your children have a 25% chance of being homozygous.
Nutrients: Awareness only · Timing: — · Track: Family history of hemochromatosis; ferritin only if symptoms arise
A379V (+/-) BCMO1 reduced beta-carotene conversion
Eating a lot of carrots, sweet potatoes, or leafy greens but not feeling the benefit
Dry skin, especially on the upper arms or thighs (keratosis pilaris — the "chicken skin" bumps)
Night vision that feels worse than it should for your age
Frequent minor infections, slow wound healing, or a run-down immune system
Plant-heavy or vegetarian/vegan diet with low or borderline vitamin A on labs
Skin turning slightly yellow-orange from heavy carrot/squash consumption (carotenemia — beta-carotene accumulating because it can't convert)
BCMO1 (β-carotene 15,15'-monooxygenase 1) is the primary enzyme that splits dietary beta-carotene from plant foods into retinal, which then becomes retinol — the active form of vitamin A. Two common coding variants reduce the enzyme's catalytic activity. The primary SNP rs7501331 (A379V) with a single T allele reduces conversion by about 32%. The secondary SNP rs12934922 (R267S) adds to this: people with at least one T allele in both SNPs have roughly 69% reduced conversion. That's not a complete loss — but it's enough that a plant-only vitamin A strategy can fall short, particularly on low-fat diets (because beta-carotene absorption itself requires dietary fat). Roughly 45% of the general population carries at least one reducing variant. For carriers, preformed vitamin A (retinol) from animal sources is reliable and doesn't depend on BCMO1 at all — it's absorbed and used directly. This isn't a "dairy/meat vs. plant" argument; it's about knowing whether your body gets usable vitamin A from plant sources efficiently, or whether you need some animal-source vitamin A to close the gap. If you're on a plant-only diet and have BCMO1 variants, this gap widens — consider the food strategies below, or discuss supplemental retinol with a clinician.
Preformed vitamin A (doesn't require BCMO1): beef or chicken liver (one of the densest food sources), cod liver oil, eggs (yolk especially), butter from grass-fed cows, full-fat dairy, salmon, mackerel, sardines. Still worth eating for other reasons: sweet potato, carrots, pumpkin, spinach, kale, collard greens, red bell pepper — pair these with fat (olive oil, avocado, butter, nut butters) to boost beta-carotene absorption even at reduced conversion. Cofactor support: red meat (iron), oysters/pumpkin seeds (zinc), chicken/mushrooms (niacin), almonds/eggs (riboflavin).
You carry one reducing variant — conversion is decreased by about a third. For most omnivores this gap is easily filled by eggs, butter, occasional liver or fish, or full-fat dairy. The practical difference shows up mainly on plant-only diets or very low-fat diets (beta-carotene absorption itself requires dietary fat). Include fat with your plant-based beta-carotene sources — even 2-3 grams of fat per meal significantly improves absorption of whatever conversion you do have.
Nutrients: Preformed vitamin A (retinol) from animal sources; iron, zinc, niacin, riboflavin as enzyme cofactors; dietary fat with plant sources of beta-carotene · Timing: Include one preformed-vitamin-A source a few times per week (eggs most mornings, or liver once weekly, or cod liver oil daily). Eat plant beta-carotene sources with fat rather than alone. · Track: Night vision, skin quality (especially arms), frequency of minor infections, any lab-measured vitamin A or retinol-binding protein levels
Thr105Ile (+/-) HNMT — mildly reduced histamine clearance
Anxiety or restlessness that worsens in allergy season
Sleep disruption with a racing mind, especially after wine or aged foods
ADHD-like symptoms that track with dietary histamine
Migraines or headaches without clear food triggers
Irritability or brain fog alongside other histamine-related symptoms
HNMT (histamine N-methyltransferase) is the clearance enzyme for histamine inside tissues and especially in the brain — where histamine acts as a neurotransmitter affecting arousal, attention, sleep, and mood. While DAO handles histamine from food in the gut, HNMT handles histamine already inside your cells and central nervous system. The rs11558538 variant (Thr105Ile, also written as C314T) produces an isoleucine version of the enzyme that has 30-50% lower activity than the threonine (Thr/CC) version. rs1050891 is a 3'UTR variant that further decreases HNMT mRNA stability. HNMT uses SAMe (S-adenosylmethionine) as its methyl donor, so it depends on the same methylation capacity as COMT and MTHFR. If HNMT is slow AND methylation is squeezed (MTHFR, MTRR, COMT variants), brain histamine can accumulate — showing up as anxiety that seems tied to allergy season, poor sleep, irritability, or brain fog after histamine-rich meals. Chip-coverage note: the primary rs11558538 SNP was dropped from 23andMe's v5 chip. If you're on v5, only rs1050891 (weaker-effect 3'UTR variant) is covered. Older kits or whole-genome sequencing capture both.
Methylation-supportive daily: eggs (choline), leafy greens (folate), lentils, asparagus, beets (betaine), grass-fed beef or salmon (B12), pumpkin seeds (magnesium). Histamine-load management shared with DAO: cook fresh, limit aged cheese and cured meats, rotate fermented foods, watch wine + aged food stacking — but the brain symptoms (anxiety, insomnia, fog) are the HNMT fingerprint rather than the gut/skin symptoms DAO produces.
You carry one HNMT variant. This is a mild effect on its own. If you also have DAO variants, the stack matters more; if you don't, this is probably not driving anything noticeable.
Nutrients: Natural folate (supports methylation, which HNMT depends on); B12; betaine (from beets, spinach); choline (eggs, liver); magnesium; quercetin and vitamin C for overall histamine load · Timing: No daily action needed standalone; revisit if DAO is also flagged or if allergy-season anxiety is noticeable. · Track: Anxiety intensity during allergy season; sleep quality after wine or aged-food dinners; afternoon brain fog or irritability after histamine-heavy lunches; racing thoughts at bedtime that don't respond to usual wind-down. A symptom journal that tracks pollen counts alongside food + sleep is the cleanest way to see the HNMT pattern.
Glu644Asp (+/+) HDC Glu644/Glu644 — elevated histamine production signal
Chronic allergic rhinitis or nasal symptoms without clear single trigger
Stronger reactions to histamine-rich foods than expected given DAO status alone
Food, allergy, and stress symptoms all seem to compound together
Histamine-related symptoms that are present even when dietary histamine is low
HDC (histidine decarboxylase) is the enzyme that produces histamine from the amino acid histidine — the start of the histamine pipeline. Where DAO and HNMT clear histamine, HDC makes it. The Glu644Asp polymorphism (rs2073440) reflects two forms of the enzyme: the Glu644 form (active, common) and the Asp644 form (less active, protective variant). Research in allergic rhinitis populations found that people homozygous for the Glu644 allele had roughly 3× the rhinitis risk compared to carriers of the Asp644 protective variant — suggesting the Glu644/Glu644 configuration represents elevated baseline histamine production capacity. On its own this is informational: most people are TT homozygous, and clinical histamine symptoms only emerge when production capacity exceeds clearance capacity. But in combination with slow DAO or HNMT (which this engine tracks separately), the Glu644/Glu644 state completes the "makes more, clears less" picture — the fullest genetic signature for histamine intolerance. The food strategy doesn't change whether HDC is elevated or baseline — what changes is how much margin you have before symptoms appear. For the rarer Asp644 carriers, the genetic picture is reassuring: even with slow clearance, less histamine is being made in the first place.
The food strategy doesn't meaningfully change based on HDC alone — what changes is your margin before symptoms appear. Quercetin-rich foods (apples, onions, capers, red onions), green tea (natural HDC inhibitor via EGCG), vitamin-C-rich produce (bell peppers, broccoli, kiwi). If DAO or HNMT also flag in this report, see those combo callouts — that's where the food implications concentrate.
You carry two copies of the Glu644 allele of HDC. This is the active, common form of the enzyme — roughly 50-60% of people in European ancestry populations have this genotype, so "TT" is not rare or alarming in isolation. The research finding that matters: in allergic rhinitis populations, Glu644/Glu644 homozygotes had approximately 3× the rhinitis risk compared to carriers of the Asp644 protective variant (García-Martín et al., 2009). The mechanism is straightforward — the Glu644 form of HDC has higher catalytic activity than the Asp644 form, so your baseline histamine-production capacity is at the upper end. Whether this produces clinical symptoms depends entirely on the balance with clearance (DAO for gut/dietary histamine, HNMT for tissue/brain histamine). If both clearance systems are fast, elevated production doesn't cause problems. If one or both clearance systems are slow, the "makes more, clears less" configuration is the fullest genetic signature of histamine intolerance. For the smaller group of Asp644 carriers (TC or CC on rs2073440), the opposite applies — reduced production capacity means more room for margin even with slow clearance.
Nutrients: Quercetin (mast cell stabilizer) and vitamin C (broad anti-histamine support); EGCG from green tea is a natural HDC inhibitor — modest but real; B6 (the PLP cofactor HDC uses) is already covered by the broader engine; magnesium for overall mast cell stability · Timing: No standalone timing protocol for HDC alone. When symptoms appear, pattern-matching against histamine loads (wine + aged food, allergy season, stress weeks) remains the practical lens. · Track: If DAO and HNMT are clean (not flagged), HDC alone rarely produces noticeable symptoms — track only if histamine-like symptoms appear. If DAO or HNMT are flagged, this adds weight to those findings and the food interventions there matter more.
all profiles Blood sugar stability
Every enzymatic pathway in this engine depends on stable glucose. Cortisol spikes from blood sugar crashes directly impair COMT and MAO-A clearance. Pairing complex carbs with protein and fat slows glucose absorption and keeps the system steady.
Basmati rice, sweet potatoes, oats, quinoa, lentils — always with protein + fat
Nutrients: Complex carbs + protein + healthy fat at every meal · Timing: Every meal — no exceptions · Track: Energy crashes, irritability, cravings, focus
Homozygous (+/+) — significant
Heterozygous (+/-) — moderate
Clean (-/-)
Folate → Methyl cycle
Dietary folate
MTHFR C677T
-/-
MTHFR A1298C
+/+
5-MTHF
MTR
-/-
MTRR
+/-
Methionine / SAMe
MTHFR converts folate to its active form. MTR uses B12 to transfer methyl groups. MTRR keeps B12 active for MTR to use. When any of these run slow, downstream methylation — including neurotransmitter production — is affected.
Neurotransmitter clearance
Dopamine / Serotonin
COMT V158M
-/-
MAO-A R297R
hemi
Cleared
MAO-A is running slow — system-wide neurotransmitter clearance is reduced. This is the biological basis of the rumination and mood sensitivity pattern.
Detox pathways
SOD2
+/-
·
NAT2 R197Q
+/-
·
NAT2 I114T
+/-
·
GSTP1
-/-
·
CYP1B1
+/-
SOD2 handles mitochondrial oxidative stress. NAT2 drives phase II liver detox — slow acetylators clear chemical compounds more slowly. GSTP1 handles another detox branch. These collectively determine how well the body handles processed foods, environmental exposures, and metabolic byproducts.
Iron regulation
Dietary iron
HFE C282Y
+/-
·
HFE H63D
-/-
Hepcidin signaling
Iron absorption
HFE regulates how much iron your body absorbs, via the hormone hepcidin. When HFE variants reduce this regulation, iron absorption stays high even when stores are adequate. C282Y is the stronger variant; H63D is milder. Compound heterozygous states (one of each) are moderately significant. For any HFE variant carrier, a ferritin + transferrin saturation test is the right first step — before any dietary change.
Gut microbiome & secretor status
Mucosal glycans
FUT2 W143X
not tested
Fucosylated substrates
Bifidobacteria / microbiome
FUT2 determines secretor status — whether your gut lining displays blood-group-related sugars that feed specific beneficial bacteria, especially Bifidobacteria. Non-secretors (AA homozygous for rs601338) develop a distinct microbiome and handle B12 differently. This is classically recessive: carriers of one variant copy are functionally secretors, like everyone with no variant copies. Only the homozygous non-secretor state has a clear phenotype.

Your full daily protocol — structured from waking to sleep. Everything in one flow: food, movement, and mind practices, timed to when they matter most for your profile.

Morning
Exercise first — 25 to 40 minutes aerobic
This is your single highest-leverage habit. Physical movement increases catecholamine turnover — clearing the neurotransmitters your slow gene pathways can't clear fast enough. Walking, running, cycling, swimming — all work. Consistency beats intensity.
Outdoors if possible
VDR Taq means your vitamin D receptor works less efficiently. Morning sunlight during exercise supports vitamin D synthesis and may improve receptor function.

Breakfast ideas — always include protein + complex carb + healthy fat

Eggs + boiled-and-drained spinach (or kale) + mushrooms — B2 and magnesium to support MAO-A cleanup
Oats + banana + walnuts — complex carbs, B6, magnesium
Eggs + lentils + boiled-and-drained spinach (or kale) — natural folate to support MTHFR
Salmon + sweet potato + broccoli — omega-3, B6, folate
Eggs + sautéed kale in olive oil + avocado — preformed vitamin A from yolks, fat to assist any plant beta-carotene absorption you do have
Salmon or sardines on sourdough + olive oil + tomato — an easy morning bump of preformed omega-3 a few times per week
Oxalate watch active — preparation matters
Your oxalate-handling watch pattern is firing, so the meal ideas above have been adjusted: spinach is shown as boiled-and-drained (cooking water tossed) because that drops soluble oxalate by 30–80%, far more than steaming or sautéing. Kale, collards, romaine, broccoli, bok choy, and brussels sprouts are naturally lower-oxalate and good defaults. When sweet potato or dark chocolate appear in your day, pair them with calcium at the same meal — yogurt, kefir, sardines with bones, hard cheese, or tofu. The calcium binds oxalate in the gut so less reaches the kidneys. Don't restrict dietary calcium; that backfires and increases oxalate absorption.
Include preformed vitamin A regularly
With one BCMO1 reducing variant, your beta-carotene-to-retinol conversion is about 32% lower than average. For most omnivore diets this gap is easily filled — eggs most mornings, butter in cooking, occasional liver or fatty fish. Pair plant beta-carotene foods (sweet potato, carrots, leafy greens) with fat at every meal — even 2–3 grams of fat significantly boosts absorption of whatever conversion you do have.
FADS slow conversion — favor marine omega-3 over plant
Your FADS variants reduce the plant-ALA-to-EPA/DHA conversion by roughly 30–50%. Plant omega-3 sources contribute, but less efficiently than in people with fast converter genotypes. Easy fix: fatty fish 2-3× per week (wild salmon, sardines, mackerel) OR 500mg-1g EPA+DHA daily from fish oil. Canned sardines and canned wild salmon are nutritionally identical to fresh and much cheaper. Keep walnuts, flax, and chia for overall diet quality — just don't count on them alone for omega-3 status.
DAO slow — watch histamine stacking
Your DAO variants moderately reduce dietary histamine clearance. Most meals are fine; the issue is stacking — wine + aged cheese + cured meats together produces reactions that any one alone would not. Morning: fresh eggs, fresh meat, fresh fruit are clean choices. Save the "continental" aged-cheese-and-cured-meat breakfast for occasional rather than routine.
Midday

Lunch ideas — protein-forward to avoid the afternoon crash

Turkey or chicken + basmati rice + boiled-and-drained spinach (or kale) — protein-forward, no crash
Salmon + quinoa + brussels sprouts — omega-3, complete protein, folate
Lentil soup + avocado — folate, B6, magnesium, healthy fat
Grass-fed beef + sweet potato + kale — clean protein for slow acetylators, no processed meat
Sweet potato + tahini + sautéed greens in olive oil — beta-carotene with abundant fat for better absorption
Canned wild salmon or sardines over greens + olive oil + lemon — easy preformed omega-3 that doesn't need FADS to work

Afternoon snack

Pumpkin seeds · Dark chocolate 70%+ · Brazil nuts (2–3) · Walnuts · Blueberries · Apple + sunflower seed butter
SOD2 note
Time your antioxidant-rich foods — blueberries, dark chocolate, walnuts — around exercise days. Your mitochondrial antioxidant defense benefits from the extra support during recovery.
Blood sugar — the foundation
Every meal and snack must have complex carb + protein + fat. Energy crashes amplify every vulnerability in your profile. If you're irritable, unfocused, or craving sugar — check when you last ate.
10–15 minute walk after lunch
Reduces glucose spikes by activating muscle glucose uptake independently of insulin. Stable blood sugar makes every other protocol more effective. Any pace works — even slow.
Evening

Dinner ideas — tryptophan + complex carbs to support wind-down

Turkey + sweet potato + boiled-and-drained spinach (or kale) — tryptophan + carbs to wind down serotonin → melatonin
Salmon + basmati rice + broccoli — omega-3, B6, complex carbs for steady wind-down
Chicken + quinoa + asparagus — tryptophan, complete protein, folate
Lentils + sweet potato + kale + olive oil — plant-based option with folate and B6

Evening snack (if needed)

Banana · Warm milk or chamomile tea · Small handful of macadamia nuts or pistachios · Tart cherry (natural melatonin support)
Consider light movement only after 7pm
Some individuals with MAO-A + COMT variants find that intense exercise close to bedtime delays sleep onset. A gentle walk after dinner is ideal. If evening exercise doesn't affect your sleep, continue what works.
Wind down & sleep
Focused attention meditation — 10 to 20 minutes
Single-point focus on the breath directly trains the prefrontal cortex circuit that COMT affects. Each redirect from distraction to focus is a rep for dopamine regulation. Start at 5 minutes, build to 20 over weeks. Morning after exercise is optimal, but evening works too.
Body scan before sleep
Gives the active mind a concrete, sequential task that progressively releases arousal. 10–15 minutes in bed, eyes closed, feet to head. More effective than trying to "stop thinking."
Breathwork — 4-7-8 or box breathing
Controlled breathing directly modulates the autonomic nervous system and reduces sympathetic activation. 4-7-8: inhale 4 counts, hold 7, exhale 8 — 4 cycles. Useful as a real-time tool when anxiety spikes.
Sleep hypnosis
Works with the natural hypnagogic state rather than fighting the active mind. 15–20 minutes in bed, headphones on. We recommend Jim Hoke — his book "I Would If I Could And I Can" covers techniques specifically effective for this kind of profile.
Rumination interruption
When a thought loop has been running for 20+ minutes and won't release, a 10–15 minute hypnosis or guided meditation session changes the brain state rather than fighting the loop directly. The goal is not to solve the thought — it's to change the state.
Realistic expectations
These practices compound over time. Hypnotic susceptibility varies — roughly 10–15% of people respond strongly, 20–30% moderately. Give any new practice 2 weeks of consistent use before evaluating. Combine exercise, food, and mind practices for the best results.
Weekly structure
Strength training — 3 to 4 times per week
May improve dopamine receptor sensitivity over time and builds stress resilience. Bodyweight, free weights, or machines — all work. Moderate load with controlled form. 30–45 minutes is enough. Avoid stacking hard sessions on high-stress days.
Loving-kindness meditation (metta) — 2 to 3 times per week
Particularly effective for MAO-A patterns — anxiety, interpersonal sensitivity, irritability. Generates a neurochemical state that directly counters the slow cleanup pattern. 5–10 minutes, evening works well. Noticeable effect on irritability within 2 weeks.
Avoid excessive high-intensity training
SOD2 affects mitochondrial antioxidant defense. Moderate intensity is your sweet spot — able to hold a conversation. One higher-intensity session per week is fine. Rest and recovery days matter more for your profile than average.
Weekly vitamin A anchor
Including preformed vitamin A on a rhythm works even for a single-variant carrier. Eggs most mornings covers daily baseline; one meal with liver weekly (or 1 tsp cod liver oil daily) adds a buffer. Pair plant beta-carotene foods with fat — even 2–3 grams significantly boosts absorption.
Weekly omega-3 anchor
Aim for fatty fish 2-3× per week (wild salmon, sardines, mackerel) OR a modest 500mg-1g daily EPA+DHA supplement. Canned sardines or wild salmon make this easy and cheap. Plant omega-3 (walnuts, ground flax, chia) is fine to keep — just not the primary strategy given your conversion rate.
FADS slow + SOD2 — pair more omega-3 with more antioxidants
Increasing EPA/DHA puts more polyunsaturated fat into your cell membranes, which is exactly the goal — but PUFAs are more vulnerable to oxidation than saturated fats. SOD2 variants reduce mitochondrial superoxide clearance. The balancing move: colorful vegetables and berries daily (polyphenols), Brazil nuts 1-2/day (selenium), cruciferous vegetables several times per week (sulforaphane). Keep fish oil refrigerated after opening. And don't megadose — 1-2g EPA+DHA daily is plenty; more is not better at this genotype combination.
DAO + HNMT — the clearest histamine intolerance pattern
Both clearance pathways running slow is the most genetically-clean case for treating histamine as a real factor in how you feel. Daily: cook fresh, don't stack aged/fermented/wine in one meal, freeze leftovers immediately. Support methylation every day (natural folate, B12, betaine) for HNMT. Vitamin C + quercetin-rich foods (apples, onions, capers, broccoli, kiwi) serve both pathways. Consider a DAO enzyme supplement 15 minutes before known high-histamine meals (wine-and-cheese gatherings, cured-meat plates). Track with a 2-week food/symptom journal — pattern-matching is more useful than any single lab.
DAO + MAO-A — aged cheese + wine is a compound problem
MAO-A clears tyramine (and some histamine metabolites); DAO clears dietary histamine. Aged cheese, cured meats, and red wine are rich in BOTH compounds — so at this combo, you're stacking two slow clearances on the same meal. This is why some people get dramatic reactions (headache, flushing, racing heart, anxiety spike) to aged-cheese-and-wine pairings. Practical move: split these foods across different days or meals rather than combining them. Fresh cheese (mozzarella, ricotta, cottage) over aged when you can; freshly-cooked meat over cured; white wine generally lower-histamine than red if you drink. Support magnesium + B6 (MAO-A cofactors) and copper + vitamin C (DAO cofactors).
HDC elevated + DAO slow — "makes more, clears less"
This is the fullest genetic signature for histamine intolerance on your profile. Your HDC Glu644/Glu644 genotype puts baseline histamine production at the upper end, and your DAO variants slow gut-lining clearance. The combination compounds. Priority moves: cook fresh, freeze leftovers within 24 hours rather than refrigerating for days, avoid stacking wine + aged cheese + cured meats in one meal, consider a DAO enzyme supplement before known high-histamine meals (wine gatherings, charcuterie plates), daily vitamin C + quercetin foods (apples, onions, capers, bell peppers, broccoli, kiwi), and 1-2 cups of green tea daily (EGCG is a natural HDC inhibitor — modest but real). A 2-week food/symptom journal at this genetic combination gives you the clearest actionable answer on which specific foods and combinations are your triggers.
HDC elevated + HNMT slow — brain histamine matters more
You make more histamine at baseline AND clear tissue/brain histamine less efficiently. This shows up as neurological rather than gut symptoms — anxiety in allergy season, racing-mind insomnia after wine or aged-cheese dinners, afternoon brain fog after histamine-heavy lunches. The daily move: consistent methylation support (spinach, lentils, asparagus for folate; eggs, salmon, beef for B12; eggs for choline; beets for betaine). Green tea as a mild natural HDC inhibitor. Vitamin C + quercetin-rich foods through the day. If COMT or MTHFR also flag in your report, brain histamine management stacks with neurotransmitter clearance — the methylation support covers multiple systems at once.
Check your ferritin
Low iron symptoms — fatigue, brain fog, mood instability — overlap with and compound MAO-A slow-clearance symptoms. Consider getting ferritin specifically tested (not just serum iron). If confirmed low: iron-rich foods like beef + bell peppers become a morning priority.
Your active combo rules

These fire when specific gene combinations are present together — the combined effect is more significant than either alone.

Iron + MAO-A — check your ferritin
Low iron symptoms (fatigue, brain fog, mood instability) overlap with and compound MAO-A slow-clearance symptoms. Consider getting ferritin tested. If confirmed low: iron-rich foods become a morning priority, paired with vitamin C.
DAO + HNMT — both histamine clearance pathways slow
DAO clears dietary histamine in the gut; HNMT clears tissue and brain histamine using methylation. When both run slow, histamine loads from food and from allergy season can build up in ways that produce a mixed picture — gut/skin symptoms from DAO limits and neurological symptoms (anxiety, insomnia, brain fog) from HNMT limits. The integrated strategy: (1) manage histamine load in food — cook fresh, don't stack aged/fermented/wine in one meal, freeze leftovers rather than refrigerating for days; (2) support methylation every day (natural folate, B12, betaine) to give HNMT the methyl groups it needs; (3) vitamin C and quercetin as the overlapping food-based lever — both support DAO activity and stabilize mast cells. Consider a DAO enzyme supplement before known high-histamine meals (wine-and-cheese gatherings, restaurant cured-meat plates). This compound case is the clearest histamine-intolerance pattern genetically.
HDC elevated + DAO slow — "makes more, clears less"
This is the fullest genetic signature for histamine intolerance: HDC Glu644/Glu644 means your baseline histamine production runs at the upper end, and DAO slow means your gut-lining clearance runs below average. The combination compounds — more histamine produced meets less capacity to clear it. On this profile, food strategy matters more than it does for people with either finding alone. Priority moves: cook fresh, freeze leftovers within 24 hours rather than refrigerating for days, don't stack wine + aged cheese + cured meats in the same meal, consider DAO enzyme supplement before known high-histamine meals, daily vitamin C + quercetin food sources (apples, onions, capers, bell peppers, broccoli, kiwi), and green tea (EGCG is a natural HDC inhibitor). A 2-week food/symptom journal is particularly useful at this genetic configuration because the pattern-matching yields clear answers about which specific foods and combinations are the triggers for you.
Oxalate-handling watch pattern — convergent risk context
Multiple genes in your profile point toward calcium-oxalate handling and stone-risk context (cyp24a1, cldn14 + VDR Taq anchor). This is a watch pattern, not a diagnosis. It does not mean you have oxalate sensitivity, primary hyperoxaluria, or kidney stones — those require clinical evaluation. What it does mean: the food and lifestyle moves below have unusually clear evidence in your genetic context. Hydration first — pale-yellow urine throughout the day is the single highest-leverage variable for stone prevention. Boil leafy greens (spinach, chard, beet greens) and discard the cooking water; soluble oxalate drops 30–80% depending on the vegetable, far more than steaming. Pair calcium-rich foods (yogurt, kefir, sardines with bones, tofu, lower-oxalate greens like kale and collards) with oxalate-rich foods at the same meal — calcium binds oxalate in the gut so less reaches the kidneys. Do NOT restrict dietary calcium; low-calcium diets backfire by increasing oxalate absorption. Citrus added to water provides citrate, which inhibits crystal formation. Lower-oxalate alternatives when convenient: kale, collards, romaine, bok choy, cauliflower. High-oxalate foods to moderate (not eliminate): spinach, beets, almonds, dark chocolate, sweet potatoes, rhubarb, Swiss chard. If you have a stone history or recurrent gut symptoms after high-oxalate meals, a 24-hour urine oxalate test and a clinician conversation are the next step — not dietary self-experimentation.
MTHFR + MTRR — folate and B12 both need support
Emphasize both natural folate foods and B12-rich foods consistently at every major meal.
MTHFR + SHMT1 — folate supply chain is squeezed
SHMT1 feeds raw material into MTHFR. When both run slow, less active folate is produced at every step. Prioritize folate-rich foods at every meal — lentils, spinach, asparagus — and include glycine sources like eggs and bone broth.
DAO + MAO-A — amine clearance broadly compromised
MAO-A clears monoamine neurotransmitters (serotonin, dopamine, norepinephrine) and also some histamine metabolites. DAO clears dietary histamine. When both run slow, your body's amine-management bandwidth is reduced — so tyramine-rich foods (aged cheese, cured meats, fermented products, red wine) hit doubly hard: the tyramine stacks on already-slow MAO-A clearance, and the histamine in the same foods stacks on already-slow DAO. This is why some people get dramatic reactions (headache, flush, racing heart, anxiety spike) to aged-cheese-and-wine pairings — two compounding clearance problems eating the same foods. Practical moves: fresh over aged always; avoid wine-and-aged-cheese-and-cured-meat combinations; split tyramine/histamine foods across different meals rather than stacking; support magnesium and B6 (MAO-A cofactors) and copper + vitamin C (DAO-supportive).
HDC elevated + HNMT slow — brain histamine load amplified
HDC Glu644/Glu644 produces more histamine at baseline; slow HNMT means tissue and brain histamine clears less efficiently via methylation. The combined effect shows up most clearly in the central nervous system — anxiety that spikes in allergy season (when baseline histamine is already elevated by pollen), insomnia with racing mind after wine or aged-food dinners, afternoon brain fog after histamine-heavy lunches. Food moves: support methylation every day (natural folate from spinach/lentils/asparagus, B12 from eggs/salmon/beef, choline from eggs, betaine from beets) to give HNMT the methyl groups it needs; green tea as a mild natural HDC inhibitor; vitamin C + quercetin as overall anti-histamine cover. If you also have COMT or MTHFR variants flagged, brain histamine management becomes a meaningful food priority — consistent methylation support pays off across all three pathways.
FADS slow + SOD2 — pair higher omega-3 with antioxidant support
Increasing EPA/DHA intake — whether from fish or supplements — puts more polyunsaturated fat into cell membranes. Polyunsaturated fats are more vulnerable to oxidation, so antioxidant capacity becomes more important as you close the omega-3 gap. SOD2 variants reduce mitochondrial superoxide clearance, so the antioxidant side wants extra support. Food cover: colorful vegetables and berries daily (polyphenols), Brazil nuts 1-2/day (selenium — glutathione peroxidase cofactor), some raw garlic/onion (sulfur), cruciferous vegetables (sulforaphane). Keep fish oil stored cold and don't megadose — 1-2g EPA+DHA daily is plenty for most people; more isn't better at this genotype combination.

45 SNPs tested · 22 variants found · 23 clean · Genotype-inferred sex: male (provisional — based on non-PAR X heterozygosity)

GeneVariantAllelesResult
ACAT102GG-/-
APOEε2 (R176C)CC-/-
APOEε4 (C130R)TT-/-
BCMO1A379VTC+/-
BHMT02CC-/-
CASRAla986SerGG-/-
CBSA360AAA+/+
CBSC699TGG-/-
CBSN212NGG-/-
CLDN14T173TTC+/-
COMTH62HCC-/-
COMTP199PGG-/-
COMTV158MGG-/-
CYP1A1C2453AGG-/-
CYP1A2*1FAA-/-
CYP1B1N453STC+/-
CYP24A1intronicTT+/+
CYP2E1*4GG-/-
DAOHis645AspGC+/-
DAOThr16MetTT+/+
FADS1Δ5 desaturaseTG+/-
FADS2Δ6 desaturaseAG+/-
GSTP1I105VAA-/-
HDCGlu644AspTT+/+
HFEC282YAG+/-
HFEH63DCC-/-
HNMTThr105IleTC+/-
LCT-13910AA-/-
MAO-AR297RTThemi
MTHFRA1298CGG+/+
MTHFRC677TGG-/-
MTHFRP39PAG+/-
MTRA2756GAA-/-
MTRRA664AAG+/-
MTRRA66GAG+/-
MTRRH595YCC-/-
MTRRK350AAA-/-
MTRRR415TCC-/-
NAT2G286EGG-/-
NAT2I114TTC+/-
NAT2R197QAG+/-
SHMT1C1420TAG+/-
SOD2A16VAG+/-
VDRBsmCC-/-
VDRTaqAA+/+
Not tested in your file
Different DNA testing services cover different SNP sets. The markers below weren't in your raw data file, so we couldn't determine your status at these positions. Absence here does not mean you're clean — it means the position wasn't genotyped. This matters most for X-linked variants inherited from a parent, where a relative's report may carry the variant even if yours shows nothing.
High-priority markers not covered
FUT2 W143X (rs601338)
SLC26A6 V206M (rs184187)
+ 5 other markers not covered
CYP1A1 *2C (rs1048943)
BCMO1 R267S (rs12934922)
DAO Ser332Phe (rs1049742)
DAO promoter (rs2052129)
HNMT A939G (3'UTR) (rs1050891)
Provider notes
Medication-Relevant Genetic Markers
A few of your genes affect how certain medications work in your body. foodZipper gathers those markers here — not to interpret them, but so you can bring them to your doctor or pharmacist.
These are single-marker observations from consumer raw genetic data and are not a clinical pharmacogenomic test. A marker shown as "not detected" or "not available" is not a negative clinical result. Share relevant findings with your prescribing provider or pharmacist.
Statin muscle-symptom markerMarker not detected
SLCO1B1 · rs4149056 · c.521T>C (p.Val174Ala)
SLCO1B1 rs4149056 — relevant allele not detected in this file. This statement applies only to this single marker; it is not a clinical pharmacogenomic result. This is reassuring for this specific SLCO1B1-related simvastatin muscle-symptom pathway, but it does not rule out other causes of statin side effects.
No food protocol is suggested for this marker — this is information-only, for provider review.
Source: consumer genotyping array — not clinical-grade pharmacogenomic testing.
Warfarin sensitivity markerNot available
VKORC1 · rs9923231 · -1639G>A (promoter)
VKORC1 rs9923231 — this marker was not present in the uploaded raw data file. No interpretation can be made for this marker.
No food protocol is suggested for this marker — this is information-only, for provider review.
Source: consumer genotyping array — not clinical-grade pharmacogenomic testing.
Statin exposure markerMarker not detected
ABCG2 · rs2231142 · c.421C>A (p.Gln141Lys)
ABCG2 rs2231142 — relevant allele not detected in this file. This statement applies only to this single marker; it is not a clinical pharmacogenomic result.
No food protocol is suggested for this marker — this is information-only, for provider review.
Source: consumer genotyping array — not clinical-grade pharmacogenomic testing.
Warfarin dose-modifier markerProvider review
CYP4F2 · rs2108622 · c.1297G>A (p.Val433Met)
Context-dependent marker. CYP4F2 rs2108622 — relevant allele detected (one copy). This may be relevant in specific prescribing situations (warfarin — dose modifier; interpret alongside VKORC1). Share with your provider if the related medication is current or being considered.
No food protocol is suggested for this marker — this is information-only, for provider review.
Source: consumer genotyping array — not clinical-grade pharmacogenomic testing.
Genes not assessed by this report
Some medication-relevant genes cannot be reliably read from consumer genotyping data. This report does not assess them and does not show a result for them — a blank here is not a negative result. If prescribing decisions involving these genes are relevant, clinical-grade pharmacogenomic testing is needed; a provider can order it.
CYP2D6
Function depends on whole-gene deletions, duplications, and hybrid genes that consumer arrays cannot detect.
DPYD
Relevant variants are rare and poorly covered by arrays. Because fluoropyrimidine chemotherapy toxicity is severe, a partial result must never be read as reassurance.
TPMT, NUDT15
Thiopurine dosing relies on clinical-grade testing as standard of care; partial array data risks false reassurance.
HLA-A, HLA-B
Drug-hypersensitivity risk requires clinical HLA typing; consumer-array tag-SNP inference is not reliable enough.
RYR1, CACNA1S
Linked to malignant hyperthermia; the relevant variants are rare and not reliable from consumer arrays.
foodZipper does not recommend medications, dosing, or treatment changes. These are single-marker observations from consumer raw genetic data and are not a clinical pharmacogenomic test. A marker shown as "not detected" or "not available" is not a negative clinical result. Share relevant findings with your prescribing provider or pharmacist.