Purity Products Advanced D Vitamin D Super Formula - 60 VCaps. Two VCaps provide 5,000 IU D3 Advanced D Provides: * Advanced Bone and Muscle Support * Natural Immune Support * Heart and Cardiovascular Support * Healthy Energy and Endurance Support Bones and Muscles- Without adequate Vitamin D intake, the body cannot properly metabolize Calcium. Vitamin D strengthens bones and also may enhance muscle strength because of its direct effect on calcium transport in muscles. Because of its unique interplay with calcium, vitamin D can support the health of both of these important structures. Powerful Immune Support- Vitamin D plays an important role in the function of our immune system. Vitamin D receptors are present on almost all immune cells and vitamin D has immune-modulating properties that can support long-term health and wellness by enhancing innate immunity. Heart and Cardiovascular Support- Recent research is pointing to the increasing role of vitamin D in maintaining healthy cardiovascular and heart function. Studies have found an association between optimum blood levels of vitamin D and healthy cardiovascular function.