At the age of 20, the epiphyses of most people have already closed and it is difficult to grow taller; if the epiphyses of a small number of people have not closed, they can promote their height through a balanced diet, moderate exercise and adequate sleep. Whether or not height can be increased depends on whether or not the epiphyses at the high end of the long bones are closed. If the epiphyses are closed, the body stops growing. 20 years old is already past puberty, and most people’s epiphyses have already closed at this time, so it is difficult to grow taller. If the epiphyses of a small number of people are not closed by radiological examination, not picking food, not partiality, comprehensive and balanced nutrition will help the body to grow taller. At the same time, appropriate physical exercise, especially aerobic exercise, including jumping rope, jogging, etc., to promote the development of bones and muscles, which will help grow taller; a good state of mind as well as sufficient sleep can promote the secretion of growth hormone, which, to a certain extent, will also promote growth. Human height is affected by genetics, nutrition, diseases and other aspects. It is recommended to have regular medical checkups during the growing process to monitor the development of height in order to detect problems as early as possible, which is beneficial to the reasonable growth of height.