Alfacalcitol will become active vitamin D3 in the body after taking it.Vitamin D3 has a wide range of uses, not only for calcium supplementation and treatment of osteoporosis as stated in the instruction manual. So what are the functions of vitamin D3?1, improve the body’s absorption of calcium and phosphorus so that plasma calcium and phosphorus to reach a balance.2, promote growth and bone calcification, promote dental growth and health, prevent tooth decay.3, maintain the normal level of citrate (an important substance for the body’s metabolism and growth) of the important substances in the blood.4, prevent the loss of amino acids (an important vital substance) through the kidneys.5, preventing the loss of amino acids (important substances) through the kidneys. For rickets, osteochondrosis and tooth decay. For tuberculosis and various types of lupus erythematosus has a therapeutic effect. In the last 20 years, a large number of in-depth international studies on vitamin D3 have shown that vitamin D is no longer just a health supplement for children with rickets. Vitamin D also has a broader therapeutic future, and a large number of clinical trials have confirmed. Including: 1, reduce the incidence of common cancers, such as: breast cancer, lung cancer, colon cancer, etc. 2, the prevention and treatment of autoimmune diseases, such as rheumatoid, lupus erythematosus, nephritis, ankylosing spondylitis, asthma, ulcerative colitis, and other difficult-to-treat diseases. 3, high blood pressure, vitamin D can be less use of antihypertensive medication to make the blood pressure stable. 4, the recovery of infectious diseases: such as respiratory diseases, intestinal infection, Influenza, etc., taking vitamin D can promote healing and less disease. 5, regulating the development and function of the placenta, pregnant women have a better level of vitamin D, can prevent miscarriage, pre-eclampsia, preterm labor and other pregnancy complications. 6, infants and young children have sufficient levels of vitamin D can reduce the occurrence of children’s lifelong dependence on insulin type 1 diabetes, reduce asthma and schizophrenia. The addition of vitamin D3 to asthma attacks can promote asthma relief and healing, as well as prevent excessive sweating, obesity, and recurrent infections caused by the use of corticosteroids in the traditional treatment of asthma.7 Overall, adequate vitamin D is important for the overall health of all populations, especially women and children.