Ask the doctor: Can B vitamins help prevent dementia?
However, since the 1980s, many foods have been supplemented with B vitamins. As a result, substantially fewer people have high homocysteine levels. Therefore, for most people there is not much evidence that B vitamin supplements protect against heart disease or various types of dementia. There are a small number of people who are born with genetic defects that cause high homocysteine levels. B vitamin supplements can dramatically lower homocysteine levels in these unusual people, and that probably offers protection against dementia.?
To continue reading this article, you must log in.
Subscribe to Harvard Health Online Plus (HHO+) to unlock expert-backed health insights, personalized tools, and exclusive resources to feel your best every day.
Here’s what you get with your HHO+ membership:
- Unlimited access to all Harvard Health Online content
- 4 expertly curated newsletters delivered monthly
- Customized website experience aligned to your health goals
- In-depth health guides on topics like sleep, exercise, and more
- Interactive features like videos and quizzes
- Members-only access to exclusive articles and resources
I’d like to subscribe to HHO+ for $4.99/month to access expert-backed content to help make smart, informed decisions about my well-being.
Sign Me UpAlready a member? Login ».
Disclaimer:
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles.
No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.