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Information on the latest vitamin D news and research.

Find out more information on deficiency, supplementation, sun exposure, and how vitamin D relates to your health.

Winter in the UK: D supplementation of professional athletes

Long time readers learned about musculoskeletal performance and vitamin D in March of 2007.

Peak athletic performance and vitamin D

In 2009, my colleagues and I published the theory that vitamin D will improve performance.

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About John Cannell, MD

Dr. John Cannell is founder of the Vitamin D Council. He has written many peer-reviewed papers on vitamin D and speaks frequently across the United States on the subject. Dr. Cannell holds an M.D. and has served the medical field as a general practitioner, emergency physician, and psychiatrist.