Caution: Sprinkle this savory seasoning with care
Nutritional yeast might trigger side effects, interfere with medications, or cause flare-ups of certain conditions.
- Reviewed by Nancy Oliveira, MS, RD, LDN, CDCES, Contributor; Editorial Advisory Board Member, Harvard Health Publishing
Nutritional yeast is a savory condiment that's often heavily fortified with vitamins. Because high doses may cause side effects, interact with some medications, or cause certain health problems, it's best used sparingly as a flavoring, not as a supplement.
To continue reading this article, you must log in.
Source matters. Subscribe to HarvardHealthOnline+ FREE for 30 days for unlimited access to the site – where all content is reviewed by an HMS physician or faculty expert.
With HHO+ you get these exclusive benefits:
- 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
SPECIAL OFFER! UNLOCK EXPERT ACCESS for 30 days FREE!
Already a member? Login ».
About the Reviewer
Nancy Oliveira, MS, RD, LDN, CDCES, Contributor; Editorial Advisory Board Member, Harvard Health Publishing
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.
