Nature’s Field Vitamin D3 contains 1000 IU of vitamin D as cholecalciferol in each softgel. It promotes strong healthy bones, teeth and body immune system. Vitamin D (cholecalciferol) is a fat-soluble vitamin that helps your body absorb calcium and phosphorus. Your skin produces Vitamin D on exposure to sunlight and found in few foods but taking vitamin D3 supplement is an effective way to meet your needs and prevent deficiency. Vitamin D is important for a number of reasons, can also help protect you against a range of conditions such as cancer, type 1 diabetes, and multiple sclerosis. Vitamin D deficiency causes osteomalacia (softening of the bones) or osteoporosis. Osteomalacia results in poor bone density and muscular weakness. Osteoporosis is the most common bone disease among post-menopausal women and older men.