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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.

Author Archives: Dr William Grant

About Dr William Grant

Dr. William Grant is an epidemiologist and founder of the nonprofit organization Sunlight, Nutrition and Health Research Center (SUNARC). He has written over 140 peer-reviewed articles and editorials on vitamin D and health. Dr. Grant is the Science Director of the Vitamin D Council and also serves on their Board. He holds a Ph.D. in Physics from UC Berkeley.