Vitamin D is a vital nutrient needed to maintain strong bones. It also supports muscle, immune, and lung function as well as the metabolism and brain, blood, and gut health. Without adequate vitamin D, the body can’t absorb the calcium it ingests—leading to weakened bone health and osteoporosis—and the immune system can’t effectively fight off bacteria and viruses.
Despite vitamin D’s important role in physiological health, 50 percent of the