Given that this study was not conducted on bodybuilders who most often use Steroids to gain muscle mass, I do not think that this study can be perceived adequately. I am familiar with a large number of people who use steroids, and none of them uses drugs, especially heavy drugs. Many of them do not even drink alcohol. I advise you to read a few articles from here
https://fitnessclone.com/category/reviews/nootropic-reviews/ since there is information for the target audience of these products. In addition, I still did not understand how cocaine addiction in adolescents and steroids are connected. What a terrible article.