Patrick Arnold

Patrick Arnold is an American organic chemist known for introducing androstenedione, 1-androstenediol, and methylhexanamine into the dietary supplement market, and for creating the designer steroid tetrahydrogestrinone, also known as THG and "the clear". THG, along with two other anabolic steroids that Arnold manufactured, not banned at the time of their creation, were hard-to-detect drugs at the heart of the BALCO professional sports doping scandal.