Anabolic steroids can cause the development of acne. However, the extent to which it is experienced can be due to a number of varying factors, with the particular steroids and exact dosages used being primary. The skin´s sebaceous glands have a particularly high affinity to Dihydrotestosterone, which is an androgen the body naturally produces from testosterone via the enzyme 5-alpha Reductase. Increased sebaceous gland activity promotes oily skin which can combine with bacteria and dead skin (normal wear and tear) eventually causing pores to become clogged more quickly than the body can cleanse them. This of course, is preventable by using only particular steroids, cleansing the skin regularly, and perhaps using a topical anti-androgen.
Richard Pound , chairman of the World Anti-Doping Agency and a partner in the Canadian law firm Stikeman Elliott, says: "The use of performance-enhancing drugs is not accidental; it is planned and deliberate with the sole objective of getting an unfair advantage. I don't want my kids, or your kids, or anybody's kids to have to turn themselves into chemical stockpiles just because there are cheaters out there who don't care what they promised when they started to participate. I don't want my kids in the hands of a coach who would encourage, condone or allow the use of drugs among his or her athletes."
Rick Collins, JD, CSCS [ ] is the lawyer that members of the bodybuilding community and nutritional supplement industry turn to when they need legal help or representation. [© Rick Collins, 2013. All rights reserved. For informational purposes only, not to be construed as legal or medical advice. Adapted from a column in Muscular Development magazine.]  http:///hln/nl/5356/Doping-in-sport/article/detail/1416751/2012/03/30/Een-sporter-betrapt-bij-dopingcontrole-van-4- (use Google translate, from Dutch).