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Vitamin D & Disease Prevention

November 1, 2026 · 31 min

Show notes

Today, we discuss vitamin D, sunlight, and disease prevention with Dr. William B. Grant, a pioneer in research on vitamin D, solar ultraviolet-B (UVB) exposure, and chronic disease prevention. He trained as a physicist at the University of California, Berkeley, and had a distinguished, decades-long career in atmospheric science. His move into health research produced one of the earliest articles linking diet to risk of Alzheimer’s disease, in 1997. In 2002, he published an influential study linking solar UVB exposure with lower mortality from 13 types of cancer. Dr. Grant is the director of the nonprofit Sunlight, Nutrition, and Health Research Center, where he continues his research, education, and public health advocacy. He is author or co-author of 344 articles about vitamin D, sunlight and health—and done of the most cited authors in the field of vitamin D and sunlight to defeat disease. He is also one of the first recipients of the inaugural GrassrootsHealth Baggerly-Garland Vitamin D Scientist Award, which will be presented on November 2, World Vitamin D Day. Disclosure: Dr. Leigh Frame serves on the GrassrootsHealth scientist panel, and she and Dr. Grant are collaborators on a manuscript on vitamin D dosing. ◘ Related Links https://www.dropbox.com/scl/fi/bi3xhruvdfa5wsqj2ybi5/110126-Show-Notes-Links.docx?rlkey=qj6a7gsegyabznlxm87m2cyp5&st=xzhky5kd&dl=0 ◘ Transcript: https://bit.ly/3WJ9LZr ◘ Disclaimer: The content and information shared in GW Integrative Medicine is for educational purposes only and should not be taken as medical advice. The views and opinions expressed in GW Integrative Medicine represent the opinions of the host(s) and their guest(s). For medical advice, diagnosis, and/or treatment, please consult a medical professional.

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