New vitamin D guidelines from Osteoporosis Canada

Jul 12, 2010

Comprehensive updated guidelines for vitamin D supplementation from Osteoporosis Canada provide physicians with the latest information, including new safe dose levels, in the latest online issue of CMAJ (Canadian Medical Association Journal).

Vitamin D, as well as calcium, is essential to preventing osteoporosis and may reduce other health risks such as diabetes and immune system disorders. While exposure to sunlight provides , Canadians are at risk of seasonal because winter sunlight in northern latitudes above 35ยบ does not contain enough ultraviolet B for vitamin D production. Supplementation is necessary to obtain adequate levels as has minimal impact.

Current Canadian recommendations for "adequate intake" and "tolerable upper level" of vitamin D are more than 10 years old and were not based on properly conducted dose-finding studies.

The new guidelines recommend daily supplements of 400 to 1000 IU for adults under age 50 without osteoporosis or conditions affecting vitamin D absorption. For adults over 50, supplements of between 800 and 2000 IU are recommended. For people who need added supplementation to reach optimal vitamin D levels, doses up to the current "tolerable upper intake level" (2000 IU) are safely taken without medical supervision.

"A daily supplement of 25 mg (800 IU) should now be regarded as a minimum dose for adults with ," writes Dr. David A. Hanley, University of Calgary Health Sciences Centre, Calgary, Alberta with coauthors. "Canadians can safely take daily vitamin D supplements up to the current definition of tolerable upper intake level (50 micrograms [2000 IU], but doses above that require medical supervision."

The authors conclude with a call for research into optimal doses and safe upper limits for vitamin D intake. "Despite a great deal of new research in the past decade, these major clinical questions have still not been addressed to the satisfaction of most experts in the vitamin D field."

Explore further: Researchers to look for patterns in patient data from ManagingLife's pain diary app

More information: www.cmaj.ca/cgi/doi/10.1503/cmaj.080663

Related Stories

New vitamin D recommendations for older men and women

May 10, 2010

The International Osteoporosis Foundation (IOF) has released a new position statement on Vitamin D for older adults which makes important recommendations for vitamin D nutrition from an evidence-based perspective.

Recommended for you

Breastfeeding protects against environmental pollution

56 minutes ago

Living in a city with a high level of vehicle traffic or close to a steel works means living with two intense sources of environmental pollution. However, a study conducted by the UPV/EHU researcher Aitana ...

When it comes to hearing, diet may trump noise exposure

1 hour ago

Although the old wives' tale about carrots being good for your eyesight has been debunked, University of Florida researchers have found a link between healthy eating and another of your five senses: hearing.

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

deatopmg
1 / 5 (1) Jul 13, 2010
"A daily supplement of 25 mg (800 IU) should now be regarded as a minimum dose for adults with osteoporosis,"

800 iu is NOT 25 mg!! Try 20 micrograms (mcg).

These recommendations are a good start.

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.