Highly absorbable. Vitamin D-3 5000 IU 240 softgels by NOW is a dietary supplement that targets the support of healthy bones and teeth. Naturally obtained from the sun. this vitamin is an essential part of the body's ability to process calcium. Because of this. it is usually taken to either avoid deficiency or lessen symptoms associated with weak bones. brittle bones and osteoporosis. Some even take it as a means to improve skin ailments like psoriasis.