Nature's Bounty Vitamin D3 2000 IU (50 mcg) Softgels provide vitamin D3, the body's preferred form of vitamin D, to help support immune health, strong bones, healthy teeth, and muscle function. Vitamin D3 helps the body absorb calcium and supports maintaining healthy vitamin D levels year-round. These easy-to-swallow rapid release softgels offer convenient daily nutritional support in a value-size bottle.