Dr. John McDougall presents Vitamin D Supplements are Harmful, Industry and the US Dietary Guidelines at the September, 2015, Advanced Study Weekend in Santa Rosa, California. More info: carbohydratescholesterolDiabetesDietaryFATGuidelinesHarmfulHealthyhearthypertensionindustryIntroductionJohn A. McDougall (Author)Medicine (Field of Study)Nutrition (Medical Specialty)Physician (Profession)Plant BasedstarchstarchivoresupplementsveganvegetarianvideoVITAMINVitamin DVitamin SupplementsvlogYouTubeRelated Posts Peter Attia — High Performance January 13, 2026 Gastroenterologist says guava should get same attention as mangoes in India: Supports heart health, insulin sensitivity January 13, 2026 How Fish Oil Supplements Power Heart Health, Brain Function, and Inflammation Reduction January 13, 2026 Know your vitamins D, E and K: Vitamin D lack in sunny S’pore, vitamin K shots for babies January 13, 2026 Consumer Report Compares Biotin Supplements to Topical Treatments January 13, 2026 Seaonic Challenges Top Hydration Packets With Ocean-Sourced Minerals January 13, 2026
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