– Vitamin A is a fat-soluble vitamin that has many functions in the body. It helps iron incorporate into red blood cells, which helps the body with proper oxygenation. It is essential for an effective immune system because 1) it…

Subscribe to NutritionFacts.org’s free e-newsletter and receive a recipe from Dr. Greger’s brand-new cookbook, The How Not to Diet Cookbook: DESCRIPTION: The Institute of Medicine’s conservative position on vitamin D is understandable given the history of hyped vitamin supplements (vitamin…