"I found my first source in a supplement store without online help," he told Mic . "Traditionally, people would be approached by the shady bodybuilder in a gym for steroid sales, and who knows what kind of quality that product is, not to mention what kind of information is available through him." Because of the Internet, he argued, today's steroid users are more intelligent. Moreover, the quality, purity and reliability of steroids are improving. More drugs are "what the label actually says" they are, Eric said. Subreddits like SteroidSourceTalk — "the cooler, gayer cousin of /r/steroids" — provide comprehensive reviews of steroid vendors. They put more power and resources in the buyer's hands.
Microbial catabolism of phytosterol side chains yields C-19 steroids, C-22 steroids, and 17-ketosteroids (. precursors to adrenocortical hormones and contraceptives ).     The addition and modification of functional groups is key when producing the wide variety of medications available within this chemical classification. These modifications are performed using conventional organic synthesis and/or biotransformation techniques.  
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.