Vitamin D for immune support in runners ☀️ A vital strategy for Autumn and Winter.Tom CoughlinMar 22, 2026∙ Paid1ShareEffects of vitamin D supplementation during autumn and winter on blood biomarkers and physical performance in runners and non runnersThanks for reading Performance Nutrition Digest! Subscribe for free to receive new posts and support my work.SubscribeStudy DetailsThis new study investigated the effects of vitamin D supplementation (2000 IU/day) across autumn and…Continue reading this post for free, courtesy of Tom Coughlin.Claim my free postOr purchase a paid subscription.PreviousNext