HEALTH TOPICS 
Calcium supplements and heart attack
Opposing studies sound a note of caution on too much calcium.
Your body needs calcium to build bones, contract muscles, send nerve signals, help enzymes and genes do their jobs, and much more — including making your heart beat. How much calcium you need to take in each day to fulfill these tasks, and in what form, are two controversial questions.
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