Human Growth Hormone was originally used for kids with growing disorders. Later, the doctors realized that if it worked so good with kids with growing disorders it would work on older people with slowing metabolism.
Human growth hormone (HGH) is secreted by the pituitary gland, which is the size of a pea and it is located near the brain. Since 1920 scientists have known about the growth hormone. Although, they began using it from 1963 to treat children who had growing issues. This continued for over 20 years.
The development in these products led to experimentation with other applications used in athletes to improve their performance. HGH continues to be the favorite treatment for underdeveloped kids and anti-aging.