Wikipedia Growth Hormone
Growth hormone (GH) is a protein-based peptide hormone. It stimulates growth, cell reproduction and regeneration in humans and other animals. Growth hormone is a 191-amino acid, single-chain polypeptide that is synthesized, stored, and secreted by the somatotroph cells within the lateral wings of the anterior pituitary gland. Somatotropin refers to the growth hormone 1 produced naturally in animals, whereas the term somatropin refers to growth hormone produced by recombinant DNA technology[1], and is abbreviated "HGH" in humans.
Growth hormone is used as prescription drug in medicine to treat children's growth disorders and adult growth hormone deficiency. In the United States, it is only available legally from pharmacies, by prescription from a doctor. In recent years in the United States, some doctors have started to prescribe growth hormone in GH-deficient older patients (but not on healthy people) to increase vitality. While legal, the efficacy and safety of this use for HGH has not been tested in a clinical trial. At this time, HGH is still considered a very complex hormone, and many of its functions are still unknown.
In its role as an anabolic agent, HGH has been abused by competitors in sports since the 1970s, and it has been banned by the IOC and NCAA. Traditional urine analysis could not detect doping with HGH, so the ban was unenforceable until the early 2000s when blood tests that could distinguish between natural and artificial HGH were starting to be developed. Blood tests conducted by WADA at the 2004 Olympic Games in Athens, Greece primarily targeted HGH.[2] This use for the drug is not approved by the FDA and as mentioned above, GH is legally available only by prescription in the United States.
GH has been studied for use in raising livestock more efficiently in industrial agriculture and several efforts have been made to obtain governmental approval to use GH in livestock production. These uses have been controversial. In the United States, the only FDA-approved use of GH, is the use of a cow-specific form of GH called bovine somatotropin for increasing milk production in dairy cows. Now retailers are permitted to label which milk was produced with or without bovine somatotropin.
1.Daniels ME (1992). "Lilly's Humatrope Experience". Nature Biotechnology 10 (7): 812. doi:10.1038/nbt0792-812a.
2.Powers M (2005). "Performance-Enhancing Drugs". In Deidre Leaver-Dunn; Joel Houglum; Harrelson, Gary L.. Principles of Pharmacology for Athletic Trainers. Slack Incorporated. pp. 331–332. ISBN 1-55642-594-5.
