🧬 Methylation and Genes: How the Body Switches DNA On and Off
Your genes aren't a verdict: nutrition affects their work
We're used to thinking genes are destiny. But there's a whole science — epigenetics — showing that nutrition and lifestyle can "switch" genes on and off. At the center of this is methylation. Let's look at how it works.
What is methylation
Methylation is a chemical process where methyl groups are "attached" to DNA. It helps the body control which genes are active and which aren't.
- Attaching methyl groups.
- Gene control.
- Genes "on/off."
- Important for health.
Epigenetics
Epigenetics studies how lifestyle changes gene work without changing the DNA itself. Nutrition, stress and sleep can affect methylation.
- Changes gene work.
- Without changing DNA.
- Nutrition affects.
- Lifestyle affects.
B12 and folate
B12 and folate (B9) are key "donors" of methyl groups. Their lack disrupts methylation and raises homocysteine.
- Methyl group donors.
- B12 and B9.
- Lack disrupts.
- Homocysteine rises.
MTHFR
MTHFR is a gene that converts folate into the active form. Its mutation slows this down, and many benefit from methylfolate.
- Folate conversion gene.
- Mutation slows.
- Methylfolate — active form.
- Genetic test.
Homocysteine
Homocysteine is an amino acid processed by B12, folate and B6. If methylation is disrupted, its level rises, harming vessels.
- Processed by B12, B9, B6.
- Rises when disrupted.
- Harms vessels.
- Risk marker.
Food sources
| Substance | Food | Comment |
|---|---|---|
| B12 | Liver | Meat |
| Folate | Spinach | Greens |
| Folate | Lentils | Legumes |
| B6 | Chicken | Meat |
Practice
- Eat greens and legumes.
- B12 — from food or supplements.
- With MTHFR — methylfolate.
- Monitor homocysteine.
- Sleep and less stress.
- Consult a doctor.
What is methylation?
A process of gene control through methyl groups on DNA.
What is epigenetics?
The science of how lifestyle changes gene work.
Why B12 and folate for methylation?
They're the "donors" of methyl groups.
What is MTHFR?
A gene that converts folate into the active form.
What is homocysteine?
An amino acid processed by B12, folate and B6.
Where to get folate?
Spinach, lentils, broccoli.
Where to get B12?
Liver, fish, meat, supplements.
Is an MTHFR test needed?
Useful with high homocysteine and problems.
Can genes be changed?
The DNA itself — no, but its work — yes, with lifestyle.
When is a doctor needed?
With high homocysteine and pregnancy planning.