Specifications Uses: As additives for milk,dairy,foods and beverage as Vitamin D supplement to promote the absorption of calcium and phosphorus. 1. Improving the body of calcium and phosphorus absorption, the plasma levels of calcium and plasma phosphorus saturation level. 2. To promote growth and bone calcification, and promote healthy teeth; 3. The absorption of phosphorus increased through the intestinal wall, and by increasing renal tubular reabsorption of phosphorus; 4. To maintain normal blood levels of citrate; 5. Vitamin D3 is the activity of 7 - dehydrocholesterol.