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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.

Author Archives: John Cannell, MD

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Is UVB the only source of natural vitamin D production?

Dr. Cannell discusses whether additional wavelengths of radiation may stimulate vitamin D production.

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