Rudy's friends noticed that he had changed. he was much more aggressive, his mood seemed to swing wildly, and he had severe acne. which performance-enhancing substance did rudy's friends think he was abusing

The performance enhancing substance is labeled as Anabolic Steroids.

Anabolic steroids can lead to a lot of problems if abused. People who tend to abuse these drugs usually injects them to the muscles or taken orally. These steroids are also applied to the skin as gel, patch, or as a cream. Anabolic steroids work differently from other drugs but, long-term steroid abuse can act on some of the brain pathways that may result in significant effect on mood and also the behavior of an individual