Arnold Schwarzenegger, widely considered as the greatest bodybuilder of all time, admitted to taking steroids (1). However, just like any other anabolic steroid, it is illegal without a prescription. Almost every JACKED bodybuilder who’s ever lived (and has taken steroids), would’ve been on Dianabol at some point in time. Dianabol promotes muscle hypertrophy, enhances strength, and improves recovery by boosting protein synthesis, nitrogen retention, and glycogenolysis. Monitor testosterone, LH, and FSH levels via blood work.