Humatrope Lilly 24mg 72IU is a naturally occurring substance secreted by the anterior pituitary gland. It is essential for normal growth and development. Growth hormone (GH)is secreted by the pituitary gland since birth and the levels peak around late adolescence. In the 2nd decade of life, the levels of growth hormone began to decline. For more than 40 years growth hormone has been available to treat specific medical disorders. However, in the past 3 decades, growth hormone mania has hit the market and everyone wants to take it. The middle aged and elderly seem to think GH can reverse aging, the young teenagers want to build their bodies and the sports athletes want to perform better. Of all the drugs abused by sports athletes, Growth hormone probably ranks in the top three.