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The Bay Area Laboratory Co-Operative (BALCO) was an American company led by founder and owner Victor Conte. In 2003, journalists Lance Williams and Mark Fainaru-Wada investigated the company's role in a drug sports scandal later referred to as the BALCO Affair. BALCO marketed tetrahydrogestrinone ("the Clear"), a then-undetected, performance-enhancing steroid developed by chemist Patrick Arnold. Conte, BALCO vice president James Valente, weight trainer Greg Anderson and coach Remi Korchemny had supplied a number of high-profile sports stars from the United States and Europe with "the Clear" and human growth hormone for several years.