Staying Healthy
Is mercury in fish dangerous?
Mercury is present in numerous environmental sources. It enters the food supply as organic mercury (methylmercury). Fish, especially the larger predator fish, concentrate the mercury in their bodies as they consume smaller creatures. The highest levels are seen in swordfish, king mackerel, shark, and albacore (white) tuna. Mercury exposure has been linked to neurologic problems in the developing fetus, but the effects on health in adults are less certain. Studies on the effects of mercury on blood pressure and heart disease have been inconsistent.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- 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
I'd like to receive access to Harvard Health Online for only $4.99 a month.
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.
