Subscribe to NutritionFacts.org for free and receive a free copy of Dr. Greger’s Evidence-Based Eating Guide: DESCRIPTION: If one is going to make an evolutionary argument for what a “natural” vitamin D level may be, how about getting vitamin D…

Every second of your life you are under attack. Bacteria, viruses, spores and more living stuff wants to enter your body and use its resources for itself. The immune system is a powerful army of cells that fights like a…

Subscribe to NutritionFacts.org for free and receive a free copy of Dr. Greger’s Evidence-Based Eating Guide: DESCRIPTION: Vitamin B12 (cobalamin) supplementation can cost as little as $2 a year. Have a question about this video? Leave it in the comment…

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: Should the vitamin D levels found in lifeguards be considered the norm for our species given the fact that…