08/25/2026
Homocysteine is a common amino acid in your blood that your body makes when it breaks down protein.
It is a building block for proteins.Your body normally changes it into other needed chemicals.Vitamins B6, B12, and folate help break it down.Low levels of these B vitamins cause homocysteine to build up.
High levels harm the inner lining of your arteries.
Excess amounts raise the risk of blood clots.
Elevated numbers connect to a higher chance of heart attacks and strokes.
Too much homocysteine links to brain shrinkage, dementia, and cognitive decline.Reducing high levels often improves overall B vitamin status and protects blood vessels.
