Homocysteine
Homocysteine is an amino acid formed when the body breaks down protein, and is processed further with the help of B vitamins.
Homocysteine is an amino acid formed when the body breaks down methionine, which comes from protein in the diet. It is converted further with the help of folate, vitamin B12 and vitamin B6, so the level also reflects the body’s supply of these B vitamins. Retesting shows how it changes over time.
Intake of folate, B12 and B6 is the main factor. Smoking, a lot of coffee and alcohol tend to raise homocysteine, and it also rises gradually with age. Genes and some medicines play a part, and B-vitamin supplements lower it.
Foods that help
Folate from leafy greens, legumes, avocado and whole grains; vitamin B12 from eggs, dairy, fish and meat; vitamin B6 from poultry, fish, potatoes and bananas.
Foods to limit
Alcohol, smoking and a diet low in vegetables and legumes.
Track it through the year
One value is a snapshot. Following it up shows whether what you changed is working.
Related markers
Educational information only — not a diagnosis. Every result is checked against safe limits, and anything critical is escalated for follow-up.
See all 84 markers →