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 Patrick Arnold manufactured (norbolethone and desoxymethyltestosterone (DMT)), not banned at the time of their creation, were hard-to-detect drugs at the heart of the BALCO professional sports doping scandal. BALCO distributed these worldwide to world-class athletes in a wide variety of sports ranging from track and field to professional baseball and football.

Patrick Arnold also reintroduced methylhexanamine into the market as a dietary supplement under the mark Geranamine, a substance that has gained popularity.

Arnold, who is also an amateur bodybuilder, initially gained notoriety as "the Father of Prohormones."

Arnold grew up in Guilford, Connecticut. At age 11 he started working out after his father gave him a set of weights. During the late 1970s and early 1980s, despite following protein diets, he grew frustrated with his inability to put on much muscle mass. According to his version of events, Arnold's first contact with steroids happened when "a guy in a gym got him a cheap counterfeit steroid that contained just enough methyltestosterone that it added 10 pounds of muscle in all the right places." This sparked his interest in chemistry, and in 1990 Arnold graduated with a bachelor's degree in chemistry from the University of New Haven.

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