There is a new Performance Enhancing Drug (PED) in town.

From Live Science: "...The drug, called MK-677, was evaluated for its safety and effectiveness in a study that showed the drug restored 20 percent of muscle mass loss associated with normal aging. In fact, levels of growth hormone (GH) and of insulin-like growth factor I (IGF- I) in healthy seniors who took the drug increased to the levels found in healthy young adults, said Michael O. Thorner, a professor of internal medicine and neurosurgery at the University of Virginia Health System...." [Link]