Please note that some of the paragraphs related to the usage of HGH were taken from profiles written by the South African doctor, Doctari and edited to fit structure of this article.

Human growth hormone (HGH), also called somatropin, is produced in the anterior pituitary gland found deep within the brain. It is a single chain polypeptide comprised of 191 amino acids and is one of five basic pituitary hormones. The other four being adrenocorticotropic hormone (ACTH), thyroid-stimulating hormone (TSH), follicle-stimulating hormone (FSH) and luteinizing hormone (LH).