Read the fine print: Calcium supplement studies
Two studies — one in the Lancet, one in the British Medical Journal — have reported that calcium and vitamin D supplements don’t prevent fractures. This sounds like another health news about-face: These supplements have long been touted as a good way to keep bones strong, and many previous studies have shown just the opposite — that they do help prevent fractures. So how could two large studies, published in important medical journals, reach the opposite conclusion?
This is really a lesson in careful reading. The headlines got the broad brushstroke right: Both studies did find that after about two years, people randomly assigned to take calcium and vitamin D had just as many fractures as those who took placebo pills.
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.