At least one studio made a conscious effort to keep its leading man squeaky clean. Before Cavill began his grueling five-month preproduction training for Steel , Warner Bros. requested a list of exactly what the training team might ask Cavill to use. Twight gladly complied, given that he believes radical body recomposition can be done naturally when it is guided by experienced trainers and driven by discipline and commitment. For Cavill, Twight recommended only Udo's Oil (a blend of essential fatty acids) and magnesium to aid sleep, the time when growth hormone occurs naturally.
Some side effects of prohormone supplementation can include acne breakouts, temporary hair loss, and increased sensitivity of the breast tissue. To help minimize these undesirable side effects, many users add a process known as post cycle therapy. Completing post cycle therapy entails taking an additional supplement that will offset spikes in testosterone levels and clear any toxins that have accumulated in the liver. Since prohormones are processed and broken down in the liver, it can add more stress on this organ than normal. These supplements can also lead to increases in blood pressure, which is another reason why post cycle therapy is a good idea.
The original brand name of oxandrolone was Anavar, which was marketed in the United States and the Netherlands .   This product was eventually discontinued and replaced in the United States with a new product named Oxandrin, which is the sole remaining brand name for oxandrolone in the United States.   Oxandrolone has also been sold under the brand names Antitriol ( Spain ), Anatrophill ( France ), Lipidex ( Brazil ), Lonavar ( Argentina , Australia , Italy ), Protivar, and Vasorome ( Japan ) among others.     Additional brand names exist for products that are manufactured for the steroid black market.