Calcium can maintain and build stronger bones. If you want your body to take in the calcium, you must have enough vitamin D You can get vitamin D many ways, including sunlight, food, and supplements. All of these things allow your body to take in more calcium. Two of the best sources for vitamin D are exposure to the sun... FULL ARTICLE @ http://www.101vitamins-minerals.com/the-best-article-available-on-vitamins-and-minerals-2/?a=533
Vitamin D is a fat-soluble vitamin that your body makes after exposure to ultraviolet (UV) rays from the sun. Vitamin D functions as a hormone because it sends a message to the intestines to increase the absorption of calcium and phosphorus. By promoting calcium absorption, vitamin D helps to form and maintain strong bones.
Vitamin D Deficiency chart.Vitamin D is a group of fat-soluble secosteroids responsible for enhancing intestinal absorption of calcium, iron, magnesium, phosphate and zinc. In humans, the most important compounds in this group are vitamin D3 (also known as cholecalciferol) and vitamin D2 (ergocalciferol)