Your Organic Acids Are Telling a Story. Your Genes Explain It.

The MTHFR gene produces an enzyme that converts folate (from food or supplements) into methylfolate, the form your cells can actually use. It also helps recycle B12 and keeps your methylation cycle running. This cycle powers energy production, detoxification, neurotransmitter synthesis, and DNA repair.

Approximately 40% of people of European ancestry carry the C677T variant, which reduces MTHFR enzyme efficiency by 40 to 70%. When this enzyme works slowly, folate piles up in an unusable form while your cells become functionally deficient in the active methylfolate they need. Your bloodwork might show normal folate levels. Your organic acids will show the truth: elevated homocysteine, elevated methylmalonic acid, backed-up methylation markers.

You eat folate-rich foods and take supplements, but the conversion step is broken. Your energy stays low, your methylation markers stay high, and standard B vitamins don’t help. You feel foggy, tired, unable to detoxify efficiently, and confused why nothing is working.

The VDR gene produces the vitamin D receptor, a protein that sits on your cell surfaces and mitochondria. When vitamin D binds to this receptor, it unlocks dozens of metabolic processes: calcium absorption, immune regulation, energy production, and mood stability.

Roughly 30 to 50% of the population carry a VDR variant that reduces receptor sensitivity. Your cells become less responsive to vitamin D signaling, even if your serum vitamin D level looks adequate. You can have a serum vitamin D of 50 ng/mL and still be functionally deficient at the cellular level because your receptors aren’t receiving the message. Your organic acids may show calcium dysregulation markers or energy production inefficiency that standard vitamin D supplementation doesn’t improve.

You take vitamin D, your level goes up on a test, but you feel no different. Your bones still ache. Your energy is still low. Your immune system is still reactive. This is the cellular vitamin D deficiency nobody talks about.

The HFE gene produces a protein that tells your intestines how much iron to absorb from food. It’s your body’s iron brake. When it works normally, excess iron is blocked from absorption. When it has the H63D variant (present in 15 to 20% of people of European ancestry), the brake gets loose, and your cells absorb more iron than they should, even when iron stores are already adequate.

Unlike C282Y homozygotes who develop dangerous hemochromatosis, H63D carriers have milder iron dysregulation. Your serum ferritin creeps up slowly. Your organic acids may show oxidative stress markers that puzzle your practitioner. You take an iron supplement thinking it will help fatigue, and your ferritin jumps. You feel worse, not better, because now you have functional iron overload.

Excess iron generates free radicals, accelerates aging, inflames your gut, and blocks absorption of other nutrients like zinc and copper. You feel heavy, foggy, inflamed, and more exhausted than before supplementation.

The BCMO1 gene produces the enzyme beta-carotene 15,15′-monooxygenase, which converts plant-based beta-carotene into retinol, the active form of vitamin A your body actually uses. Retinol is essential for vision, skin health, immune function, and reproduction.

Approximately 45% of the population carry a BCMO1 variant (R267S or A379V) that reduces conversion efficiency significantly. Your body can eat a huge serving of carrots or sweet potatoes and still fail to produce enough usable vitamin A because the conversion enzyme works poorly. Your organic acids may show skin health markers or immune dysfunction markers that don’t respond to increased plant-based vitamin intake.

You see a nutritionist who tells you to eat more orange vegetables. You do. Your skin is still dry. Your vision is still compromised. Your immune system is still reactive. Plant-based vitamin A doesn’t work for your genetics.

The FUT2 gene determines whether you’re a secretor or non-secretor. This affects which nutrients you absorb efficiently and which bacterial species can colonize your gut. Secretors release ABO blood group antigens into mucus, which shapes their microbiome and nutrient absorption profile.

Non-secretors (roughly 20-30% of the population) have a FUT2 variant that reduces their ability to secrete these antigens. This changes which beneficial bacteria thrive in their gut, leading to reduced vitamin B12 production by gut bacteria and altered carbohydrate fermentation. Your organic acids may show elevated markers for dysbiosis or B12 metabolism dysfunction even though your serum B12 looks normal.

You struggle with B12 deficiency despite eating meat and taking B12 supplements. Your gut dysbiosis doesn’t respond to standard probiotics because the bacteria strains don’t match your secretor status. You feel fatigued, foggy, and your methylation cycle stalls.

The COMT gene produces catechol-O-methyltransferase, an enzyme that clears dopamine, norepinephrine, and epinephrine from your brain and body. It’s your neurotransmitter off-switch. The Val158Met variant changes how fast this happens.

Roughly 25 to 30% of the population carry the Met/Met slow-clearer variant. Your body struggles to clear dopamine and norepinephrine quickly, meaning your neurotransmitter levels stay elevated longer, leading to overstimulation, anxiety, racing thoughts, and difficulty with high-intensity situations. Your organic acids may show evidence of chronic stress hormone elevation or sympathetic nervous system dominance. Standard stimulating supplements (high-dose B6, stimulant herbs, caffeine) make everything worse because you don’t need more dopamine. You need slower clearing.

You take a B-complex and feel jittery. You drink coffee and feel anxious all day. You exercise and your heart races afterward for hours. Everyone tells you these things are supposed to help, but your genetics make them overstimulating.