By the way, doctor: B vitamins and homocysteine

Q. How do B vitamins lower your homocysteine level, and how important is it to have a normal level?

A. Homocysteine is an amino acid that is part of everyone's normal body chemistry. But people with high concentrations in their blood are at increased risk for heart disease, stroke, and cognitive decline. In families with a rare genetic condition that causes very high homocysteine levels, even young children can die from heart attacks.

To continue reading this article, you must login.
  • Research health conditions
  • Check your symptoms
  • Prepare for a doctor's visit or test
  • Find the best treatments and procedures for you
  • Explore options for better nutrition and exercise
Learn more about the many benefits and features of joining Harvard Health Online »