The development of height is mainly controlled by genetic factors, with some influence of acquired factors. The development of height mainly depends on the epiphysis of the body to split the growth of the local, general epiphysis to the age of 18 years old, the epiphysis has closed, the height will not have obvious development. Now is already 22 years old, theoretically the epiphysis has been closed, height will not have obvious development space, supplemental calcium tablets on the development of height also has no obvious effect, you can consider the routine to go to the hospital to improve the knee joint and other parts of the X-ray examination, to determine whether the epiphysis is completely closed. If the epiphysis is completely closed, there is no way to continue to increase height, usually pay attention to avoid staying up late, appropriate exercise such as running and jumping sports, theoretically, the development of height may help. If the epiphysis has already closed, we can only let nature take its course.