There is no way for adults to grow taller even with growth hormone because the adult bones have completely closed, the epiphysis has completely turned into bone, and there are no bone growth centers. Once there is no bony growth center, the bones cannot be lengthened, so there is no way to promote bone growth even with growth hormone, and it may have a negative effect on bone metabolism. Growth hormone can promote bone growth in young people and adolescents with unclosed bones, but there is no bone growth promotion effect with growth hormone in adults.