Steroids like Tren are powerful strength and muscle-building agents used by bodybuilders and powerlifters. Human growth hormone was originally used for medical purposes but is now abused by athletes to enhance performance. Creatine occurs naturally and helps rebuild muscle after workouts, while supplements provide more creatine. Various prohormones including Primabol, androdiol, and cyclodiol are taken orally or sublingually to promote muscle growth through different mechanisms.