Performance-enhancing compounds, generally known as performance-enhancing drugs (PED), are substances used to boost any type of human activity performance. Doping in sports is a well-known example, in which athletes and bodybuilders employ prohibited physical performance-enhancing medications. Bodybuilders may use anabolic steroids, peptides, protein powders, glucose solutions, caffeine, and other substances for this purpose. Anabolic steroids are synthetic versions of the hormone testosterone. They increase muscle mass by stimulating the growth of new muscle cells. Anabolic steroids are used by bodybuilders to build up muscles faster. The most common form of anabolic steroid used by bodybuilders is methandrostenolone (Methandrin). Other popular anabolics include stanozolol (Winstrol), dihydrotestosterone (DHT), and turinabol (Turinabol). These chemicals can have undesirable side effects including increased blood pressure; changes in your mood; and symptoms of hyperthyroidism or hypothyroidism. Long-term use may also lead to liver damage, cancer, or infertility. Peptides are small proteins that help build muscle tissue. They do this by triggering the body's natural production of growth hormones after training sessions. Thus, they play an important role in increasing muscle strength and size over time. There are two types of peptides commonly used by bodybuilders: anabolic and catabolic.