Benefits of Solgar Vitamin D3 run from supporting healthy bones to aiding the immune system. Solgar Vitamin D3 assists the body with calcium absorption – if calcium is not absorbed properly, bodily systems in need will take it from the bones. Solgar Vitamin D3 supports the immune system. Solgar Vitamin D3 strengthens breast, colon and pancreas health. One of the primary natural sources of Vitamin D is the sun, so supplementation can be essential during winter, in northern climates, and during summer if you use sunscreen. Vitamin D absorption declines with age. Solgar proudly introduces Vitamin D3 (Cholecalciferol). One capsule provides a high potency dose of 5000 IU of Vitamin D, helping meet the needs of the large number of Americans who are deficient in this key vitamin.