What is vitamin d good for?

Calcium metabolism: Vitamin d. Is a hormone that is absorbed into your cell's nucleus and affects the types of proteins that your cell makes. The specific proteins that vitamin d regulates help you to maintain enough calcium and phosphorus in your body to allow the muscles to function properly, the bones to retain enough but not too much calcium. Without it, he would develop rickets and osteoporosis.

Calcium absorption: Vitamin d is necessary for absorption of calcium and phosphorus from the intestine, 2 important components of bone. It is necessary for maintenance of healthy bones. It may also have many other benefits such as fighting infections but this is controversial.