Vit D Sublingual Spray - 1000 IU - Vitamin D is a fat soluble vitamin that helps to regulate the absorption of calcium and phosphorous and helps in the development and maintenance of teeth and bones. It supports the immune system and is a factor in the maintenance of good health. Tristar Vit D Spray provides 1000 IU of Vitamin D3 with instant bioavailability in one spray. Each bottle provides 625 sprays.