Ca2+ is a calcium ion, most of the calcium exists in the bones and teeth, the rest mainly exists in the extracellular fluid, in the form of Ca2+, Ca2+ is the most abundant cation in the human body, it is a very important substance in the body, in the body with the role of participating in muscle contraction, strengthening the bones, maintaining the normal function of nerve conduction, and to promote coagulation and so on.1, participate in muscle contraction: the body’s movement, the heart and other The activities of internal organs all need the help of calcium. Besides in bones and teeth, calcium exists in blood and cells in the form of Ca2+, which realizes muscle movement by stimulating muscle contraction; 2. Strengthening bones: there is a part of inorganic matter in bones, the main component of which is Ca2+, which participates in the construction of bones; 3. Maintaining normal nerve conduction function: when the nerves are overexcited, the nerve cells will open, and the Ca2+ from the outside enters into the cells, causing the cells to secrete Neuroplasm, which transmits nerve signals to all parts of the body; 4, Promote blood clotting: Ca2+ is involved in the process of blood coagulation, and if it is lacking, it may lead to an obstacle in the coagulation mechanism, and the patient may suffer from more than just bleeding. In addition the calcium in the organism is mainly absorbed through food and excreted through urine and feces, and can be supplemented with calcium from the diet. Such as eating kelp, nori and other foods with high calcium content, eat more fresh vegetables and fruits rich in vitamin C, etc.. You can also maintain a reasonable amount of sunlight, calcium intake from sunlight. Insufficient intake of calcium ions can lead to osteoporosis, cause deficiency symptoms as well as hypercalcemia. Excessive intake can lead to discomfort, damage internal organs, affect other trace elements, and hypocalcemia.