Vitamin D promises to be one of the most talked-about and written-about supplements of the decade. While studies continue to refine optimal blood levels and recommended dietary amounts, the fact remains that a huge part of the population are deficient in this essential nutrient. If the findings of existing clinical trials hold up, the potential consequences of this deficiency are likely to go far beyond inadequate bone development and excessive bone loss that can result in falls and fractures. Every tissue in the body, including the brain, heart, muscles and immune system, has receptors for vitamin D, meaning that this nutrient is needed at proper levels for these tissues to function well. Find out more about how Vitamin D works on our “Ask a Pharmacist” podcast.