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 Health Experts Say Most People Don’t Need Popular Electrolyte Supplements February 28, 2026 Electrolyte supplements are everywhere. Who benefits from them and when? | Nation/World News February 28, 2026 Electrolyte supplements are everywhere. Who benefits from them and when? February 28, 2026 Collagen is no ‘quick fix’ for wrinkles, study finds February 28, 2026 Collagen is no ‘quick fix’ for wrinkles, study finds February 28, 2026 Dietary Supplements Market Size, Share, Leading Companies, Emerging Trends, Growth Drivers, and Future Outlook (2025-2030) February 28, 2026
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