It is Ao Bai calcium, which is refined from vitamin C in grain by modern high-tech technology, and contains no heavy metals. The absorption rate is as high as 95%, which is more than five times that of ordinary calcium tablets. It is helpful to improve bone density, promote the synthesis of bone matrix and increase the elasticity and toughness of cartilage joints. Poor: 1. At present, all calcium supplement products on the market are simply calcium supplement. 2. Ordinary calcium is difficult to be absorbed by human body, and the absorption rate is only about 15%-20%. 3. Ao Bai calcium is made from vitamin C in grain by modern high-tech technology. 4. Generally, calcium products have poor water solubility, while Ao Bai calcium can be completely dissolved by water, so it is more easily absorbed by human body. The bioavailability is much higher than that of ordinary calcium. Details can be found at /dispro.asp? id=93