Vitamin D3 <!-- google_ad_client = "ca-pub-2327677141881672"; /* Short title Links */ google_ad_slot = "3055805829"; google_ad_width = 468; google_ad_height = 15; //-->

A vitamin produced by the body when exposed to ultraviolet light or obtained from dietary sources. This vitamin provides the basis for the body to build hormones that help the small intestine absorb calcium.