It depends on whether the epiphysis of the body is closed at the age of 18. If the epiphyses have closed, taking calcium tablets will not help you grow taller, but if they have not closed, you can take some calcium tablets to grow taller. The age of 18 is generally at the end of puberty, but there are individual differences, so if you want to continue to grow taller at the age of 18, it is recommended that you go to the hospital for a relevant examination to determine whether the epiphysis is closed. Because height growth depends mainly on the growth of the long bones, there is epiphyseal cartilage, or epiphysis, sandwiched between the middle of the long bones and the larger epiphyses at both ends. If the epiphyses are not closed, there is still some room for height growth. You can pay attention to calcium supplementation, such as taking calcium tablets or eating foods with high calcium content, such as milk, yogurt, soy products, etc. At the same time, appropriate exercise and adequate sleep. At the same time, appropriate exercise and adequate sleep are also beneficial to height growth. If the epiphysis has closed, the possibility of continued growth is not very high, and taking calcium tablets is not very useful.