The federal agents served search warrants at the Castro gym bunny hot spot after learning that the store was selling two supplements called Tren Extreme and Mass Extreme, which promise “XTREME RESULTS” on their website. The two supplements are sold as legal products but in fact contain two super-strength designer steroids — trenbolone, which is used for beef cattle, and a banned steroid called DMT.

SF Gate reports that the Pacifica home of Maurice Sandoval was also raided after he was identified as the owner of the laboratory that fabricated the steroids. When undercover agents visited Max Muscle last month, the store manager told them that he had stopped selling Tren Extreme to adolescents “because it has too many side effects,” and went on to promise that it would help the user pack on 10 pounds of muscle.

This means that the hot leather muscle daddy you fucked last weekend is not only wearing gear made from cows — he’s also taking their steroids.

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Steroid raid on Castro district store (SF Gate)