The Bay Area Laboratory Co-operative (BALCO) is a controversial sports nutrition center in Burlingame, California, USA. The company achieved fame due to a long investigation in accusations that the lab provided anabolic steroids and other banned performance enhancing drugs to athletes, many famous. It has also been alleged that BALCO was responsible for the first production of the designer drug THG. The investigation is still ongoing, with charges of drug distribution directed to BALCO's founder Victor Conte, vice president James Valente , trainer Greg Anderson and track coach Remi Korchemny .

Sportspersons implicated or accused in the ensuing scandal include athletes Dwain Chambers, Marion Jones and Tim Montgomery, baseball players Barry Bonds, Jason Giambi and Gary Sheffield, and several members of the Oakland Raiders.