It’s generally considered to be one of the safest of all anabolic steroids. One very troubling side effect of anabolic steroids for men is the fact that they tend to produce some feminization effects such as painful and enlarged breasts . This process is referred to as aromatization . It has nothing to do with the sense of smell but rather an enzyme known as aromatase. When anabolic steroids are taken, the body’s aromatase will automatically convert some of the dose taken into estrogen. The amount of the dose converted to estrogen depends upon dose and type of anabolic steroid taken.