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 Electrolyte supplements are everywhere. Who benefits from them and when? | Entertainment February 28, 2026 Electrolyte supplements are everywhere. Who benefits from them and when? :: WRAL.com February 28, 2026 Electrolyte supplements are everywhere. Who benefits from them and when? February 28, 2026 Electrolyte supplements are everywhere. Who benefits from them and when? | Sports February 28, 2026 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
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