Vitamin D is one of the most crucial nutrients for many aspects of health, including boosting testosterone, supporting bone health and fighting many forms of cancer. Unique among vitamins, the best way to get plenty of vitamin D is through sensible exposure to direct sunlight. Of course, that comes with its own risks, like, you know, melanoma.
If you’re always slathered with sunblock, live in the geographic north or are a vampire, then you need to rely on your food supply and supplements for vitamin D. This is important because many studies report that most people, especially athletes, are vitamin D deficient. Beyond the common health consequences, even a slight vitamin D deficiency limits strength and performance. D-3 (or cholecalciferol) is the form that is best used by the body, so here’s how much you’d need to eat to make sure you’re getting significant amounts.