At age 26, growth hormone injections are usually not allowed to grow taller. Whether or not you can grow taller depends on the growth hormone and epiphysis, only in the case of a lack of growth hormone while the epiphysis is not closed can you grow taller by injecting growth hormone. Lack of estrogen and male hormone, growth hormone and thyroid hormone may limit the development of height. If the lack of growth hormone limits the height, the growth hormone may be injected; if the lack of growth hormone does not limit the height, it is useless to supplement more growth hormone. Usually we need to judge the space for height development by whether the epiphysis is closed or not, bone density, epiphyseal hardness, etc. If the epiphysis has been closed, then the space for height development will be smaller, and at the age of 26 years old, usually the epiphysis has been closed, so usually we can’t inject the growth hormone to grow taller. If there is a shortness of height, it is recommended to consult a doctor in time, improve the relevant examination to clarify the cause of the disease and then carry out standardized treatment to avoid delaying the condition.