Vitamin D supports intestinal calcium and phosphorus absorption and may help with urinary calcium loss.* It also aids essential mechanisms for maintaining proper calcium levels in the body and for healthy bone composition. Research indicates that it may also help with cellular health, including support for breast health, in part by helping to maintain healthy blood vessel function, supporting immune cell activity, and maintaining healthy cell metabolism. Vitamin D's role in immune health has long been established; vitamin D receptors are found on a number of immune cells, including lymphocytes and macrophages, supporting healthy immune cell activation. Vitamin D also supports cardiovascular function in some individuals*. At Pure Encapsulations, we're dedicated to providing nutritional supplements you can trust. That’s why our products are formulated using high quality, pure ingredients FREE FROM unnecessary additives and many common allergens, and backed by verifiable science. Everything you need and nothing you don't, that’s goodness encapsulated. When developing our products, we work in close collaboration with leading medical professionals and nutritional experts to create premium dietary supplements that you can feel good about. We source high-quality ingredients from the best suppliers, conduct research and clinical trials to confirm efficacy and safety, and undergo additional testing by accredited and cGMP-certified laboratories to ensure product purity and potency. We also believe in transparency, so every ingredient we put into our products, even if it’s just a trace amount, is listed on the label. If there’s an ingredient sourced from a possible allergen—we call that out too.