What is a genetic methylation test?

A genetic methylation test looks at variants in genes like MTHFR, MTR, MTRR, and COMT that influence how your body processes folate, B12, and methyl groups used in DNA repair, detox, and neurotransmitter balance.

Do I need a separate test, or can I use my 23andMe or AncestryDNA data?

Most consumer DNA tests (23andMe, AncestryDNA, MyHeritage, Nebula) already include the SNPs used in methylation analysis. You can upload the raw file to Variant Pilot instead of buying a dedicated methylation test.

What does an MTHFR variant mean?

MTHFR C677T and A1298C are common variants that can reduce the enzyme's efficiency at converting folate to its active form (5-MTHF). Effects vary widely; a variant alone is not a diagnosis.

Genetic Methylation Test: MTHFR, MTR & MTRR Explained

What methylation actually is, which genes matter (MTHFR, MTR, MTRR, COMT), and how to interpret your results without the hype.

What is methylation?

Methylation is a chemical process your cells run billions of times a day. A methyl group (one carbon, three hydrogens) gets added to DNA, proteins, hormones, and neurotransmitters. It helps regulate gene expression, detoxification, cardiovascular health, and mood.

A genetic methylation test looks at variants in the genes that run this cycle — most notably MTHFR, MTR, MTRR, COMT, CBS, and MTHFD1.

The genes that matter

MTHFR (C677T & A1298C)

MTHFR converts folate into 5-MTHF, the form your body actually uses. The C677T variant can reduce enzyme activity by roughly 30% (heterozygous) to 70% (homozygous). A1298C has a milder effect. Neither is a disease on its own.

MTR & MTRR

MTR recycles homocysteine back to methionine using B12. MTRR keeps MTR active. Variants here interact with your B12 status more than they act alone.

COMT

COMT breaks down dopamine, adrenaline, and estrogen. The Val158Met (rs4680) variant influences how quickly you clear these — often discussed in the context of stress response and caffeine sensitivity.

Do you need a dedicated methylation test?

Usually no. If you already have raw DNA data from 23andMe, AncestryDNA, MyHeritage, or Nebula, the methylation SNPs are already in the file. Upload it to Variant Pilot and we surface the variants alongside the research they come from.

How to read your results

Look at each variant's genotype (e.g., CT, TT).
Check the strength of the underlying research — a single small study is not proof.
Consider your labs: homocysteine, B12, folate. Genes suggest tendencies; labs measure reality.
Discuss meaningful findings with a clinician before changing supplements or diet.

What Variant Pilot does with your file

We map your raw DNA to peer-reviewed variants — including the methylation pathway — and summarize what the research actually says, with priority levels and citations. No hype, no supplement upsells.

See your methylation variants

Upload a raw DNA file from any major provider — takes about a minute.

Get started

Frequently asked

Is MTHFR a disease?

No. It's a common gene variant — roughly 40% of people carry at least one copy.

Should I take methylfolate?

Only with clinical guidance. High-dose methylfolate can worsen anxiety in some people, especially with certain COMT genotypes. Test, don't guess.

Can I trust 23andMe's raw data?

For SNP-level variants like MTHFR C677T, yes — the underlying chip is accurate. Variant Pilot re-interprets the raw calls against current research so you're not stuck with outdated labels.

Genetic methylation test, explained