William B. Grant, Ph.D. has authored over 280 peer-reviewed articles on vitamin D and sunlight exposure since 1996. His primary interests are identifying and quantifying the risk-modifying factors for chronic and infectious diseases, with a particular interest in ultraviolet irradiance and vitamin D as well as diet. He is also extremely passionate about getting the message out that risk of disease can be modified by diet, supplementation, and lifestyle choices. William got his BA and Ph.D. in physics from University of California Berkley. He later found himself working for the NASA Langly Research Centre where he operated an airborne laser remote sensing system for measuring ozone and aerosols on many international field expeditions. It after this where he became interested in the effects of UV light on human health. He has since been doing independent research primarily on the links between vitamin D and disease.

Keep up to date with William: https://www.grassrootshealth.net/

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