Misusing cattle steroids to "bulk up" appears to be a common practice, ... (trenbolone acetate) and Synovex (testosterone propionate and estradiol), the authors write. ...

Farmers use the steroid trenbolone acetate to beef up their cattle, which metabolize it into 17α-trenbolone, a chemical that disrupts the system that sends hormone signals in animals.

THE TREND AND the hype are new. Trenbolone is not. It was first synthesized way back in 1963 and approved for use in livestock in the 1980s to promote weight gain in cattle.

Trenbolone acetate is implanted in the ears of more than 20 million cattle in the United States, according to studies cited by the researchers in their paper.

Trenbolone is widely used on beef cattle as a growth promoter in the United States, and it was found that Knighton had no knowledge that he was consuming beef from cattle that had been injected ...

Steroids used to boost growth in cattle may endure in water longer than expected, a new study finds. It was widely believed that certain steroids and other drugs quickly degrade once they're ...