Human growth hormone better known as HGH in its abbreviated form is a huge molecule consisting of 191 amino acids. It was first revealed in the 1920s but did not take on the concern of the scientific community until 1958 when a ground-breaking endocrinologist took a child which was underdeveloped because of not being able to generate HGH and injected this child with HGH. Back in that time, HGH was obtained from thousands of brains of dead animals from which was extracted the cadavers from the pituitary gland and this only yielded a a small amount of drops. Out of the 5000 kids a total of seven kids developed mad cow disease from using this kind of extracted HGH. As a consequence the FDA in 1991 ordered it banned. An emerging new science of gene splicing shortly made it possible to generate this large molecule from scratch, but this would be a momentous task because the molecule was so large. The first company to do this was a company by the name of Genentech which by 1985 produced a human HGH molecule which was one amino acid small out of the 191amino acids needed to earn up the human HGH molecule. Since it was not really identical, they had no distress classifying this molecule as a drug. But, another company by the name of and Eli Lilly took advantage of this missing amino acid and managed to generate the human growth hormone molecule with the full 191 amino acids. This meant that this HGH molecule was 100% bio identical to the human HGH molecule even despite the fact that it was made unnaturally.