---
title: "Homocysteine — Glossary | Elwin Robinson"
description: "An inflammatory amino acid that, when elevated, damages blood vessel linings and increases the risk of heart disease and cognitive decline."
lang: en
json-ld:
---

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# Homocysteine

An inflammatory amino acid that, when elevated, damages blood vessel linings and increases the risk of heart disease and cognitive decline.

## Deep Dive

Homocysteine is a waste product of the methylation cycle. In a healthy body, it is quickly recycled into harmless methionine via vitamin B12 and folate, or converted into cysteine and eventually glutathione via vitamin B6. When this recycling process is impaired, homocysteine accumulates in the blood.

However, if you have the MTHFR gene mutation or B-vitamin deficiencies, homocysteine builds up. It is a critical 'warning light' for methylation failure. Elevated homocysteine damages the endothelial lining of blood vessels, promotes oxidative stress, increases clot formation, and accelerates arterial plaque development.

Beyond cardiovascular risk, high homocysteine is linked to cognitive decline, depression, osteoporosis, and pregnancy complications. Optimal levels are below 7 µmol/L, though conventional medicine often considers up to 15 µmol/L as 'normal.' Targeted B-vitamin supplementation in methylated forms can typically normalise levels within weeks.

## Related Protocol

See if impaired methylation is driving your homocysteine levels up.

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**Disclaimer:** Elwin Robinson is a Researcher and Executive Health Coach, not a Medical Doctor. Content is for educational optimization purposes only. Medical oversight provided by Dr. Miriam Mikicki, MD. Always consult a physician before changing your regimen.

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