What is methylation, and why do doctors keep bringing it up?
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The short answer: Methylation is the transfer of a small chemical tag (a methyl group) from one molecule to another. Your body uses it to switch genes on and off, make neurotransmitters, clear estrogen and toxins, and recycle homocysteine. It runs on B vitamins, and when those are low or in the wrong form, the whole system slows.
Think of methylation as a supply chain. The raw materials are folate, B12, B6, riboflavin, and betaine. The factory is a set of enzymes, the most famous being MTHFR. The output is a molecule called SAMe, which donates methyl groups to hundreds of downstream reactions.
What depends on it
- Neurotransmitter production (serotonin, dopamine, norepinephrine), so mood and focus
- Clearance of homocysteine, an amino acid tied to cardiovascular risk when elevated
- Estrogen metabolism through the liver, so hormone balance
- Detoxification of environmental chemicals
- DNA repair and gene regulation
Why it stalls
Three common reasons: genetic variants (MTHFR is the best known, but not the only one), low intake of B vitamins in usable forms, and high demand from stress, alcohol, medications, or pregnancy. Folic acid in a standard multivitamin doesn't help someone with an MTHFR variant much, because they can't convert it efficiently.
How we assess it
Homocysteine is the cheapest, most useful lab. Above 8 to 9 µmol/L suggests the pathway isn't keeping up. MTHFR genotyping adds context, but the homocysteine number is what we treat to.
How we support it
Active forms only: L-methylfolate instead of folic acid, methylcobalamin instead of cyanocobalamin, P5P instead of pyridoxine, riboflavin-5-phosphate, plus betaine (trimethylglycine) as a backup methyl donor. Methyl Protect combines all of these in one capsule, which is why it's our first-line methylation product. B Activ covers the same forms in a full B-complex for daily use.
Products mentioned
Houston Medical Wellness is an authorized XYMOGEN dispensary operated by a licensed physician. These statements have not been evaluated by the FDA. Ask your physician about a homocysteine test before self-treating.