Human Growth Hormone (HGH) replacement therapy is a spic-and-span concept that is getting a lot of attention from consumers and from the medical community. Some medical experts believe that HGH has the ability to combat definite effects of aging, such as an increase in body fat, the loss of lean muscle tissue, sleeping problems, and decreased psychological function. galore people are fevered about HGH replacement therapy in the hopes that much treatments will help them feel junior as they age. HGH replacement therapy is available in a variety of forms. cardinal popular forms are HGH sprays and HGH supplements. HGH sprays are orally-administered tinctures that contain any number of a combination of vitamins and amino acids designed to increase the body's natural production of Human Growth Hormone. HGH is produced by the unshapely gland, a miniscule structure at the base of the brain. HGH acts on the colored to stimulate the production of insulin-like growth factor I (IGF-I), which is carried in the bloodstream to cells and tissues that use it to maintain the health of old cells and create spic-and-span ones.