Some bodybuilders and athletes use trenbolone esters for their muscle-building and otherwise performance-enhancing effects.  Such use is illegal in the United States and many other countries. The DEA classifies trenbolone and its esters as Schedule III controlled substances under the Controlled Substances Act .  Trenbolone is classified as a Schedule 4 drug in Canada  and a class C drug with no penalty for personal use or possession in the United Kingdom .  Use or possession of steroids without a prescription is a crime in Australia . 
Even though anabolic steroids do not cause the same high as other drugs, they can lead to addiction. Studies have shown that animals will self-administer steroids when they have the chance, just as they do with other addictive drugs. People may continue to abuse steroids despite physical problems, high costs to buy the drugs, and negative effects on their relationships. These behaviors reflect steroids' addictive potential. Research has further found that some steroid users turn to other drugs, such as opioids, to reduce sleep problems and irritability caused by steroids.
The big conclusion I take from this study is that total protein intake is crucial to athletic performance. This means you can’t rely on a post-workout drink and the mythical anabolic window to deliver most of the protein you eat each day. Regular, moderate doses of protein are necessary to support a hard-training athlete looking to build lean muscle. The post-workout shake isn’t a magical solution that allows you to eat Saltine crackers and peanut butter cups the remaining 23 hours of the day. Post-workout nutrition is just a part of the solution, not the full solution.