1. It is mainly to supplement calcium for the body and is a way of oral calcium supplementation. Calcium is one of the most common elements in the human body and is known as the "reinforced concrete in life". The calcium content in the human body accounts for 1.5--2% of the total body weight, of which bones and teeth account for about 99%. Body fluids and soft tissues account for 1. It plays a vital role in human metabolism, cell function, nervous system operation, protein and hormone synthesis, etc.

2. The main ingredients of calcium tablets are calcium carbonate and vitamin D3. The function of calcium carbonate is to supplement calcium, and vitamin D3 is mainly used to help the absorption of calcium. Adolescent children are in the peak period of growth and development and have a relatively large demand for calcium, so they can appropriately supplement some calcium. In addition, in daily life, you can also supplement calcium through dietary supplements.