Parabolan (also known as trenbolone) is a synthetic steroid that was once used in the agricultural industry to fatten cattle. The drug is a powerful weight stimulant and can increase appetite. Parabolan is an esterified steroid that allows it to work for a longer period of time. Although it was used as an anabolic agent, it is also a powerful androgenic drug. It is only available as an intramuscular injection. As soon as the drug was realized to have anabolic properties, bodybuilders and other athletes began consuming it in large quantities. The drug increases body weight and muscle mass, as long as the diet is rich in calories. Like many anabolic steroids, Parabolan has similar activities. In addition to increasing protein synthesis and muscle mass, the drug can also increase the number of red blood cells. This leads to a higher level of hemoglobin and a slight increase in oxygen-carrying capacity. The higher the dose, the more significant the effects. Parabolan has never been approved for the treatment of any medical disorder. In animals, Parabolan when administered at low doses is found to be quite safe, but at high doses it does have potent side effects. The drug is no longer manufactured anywhere in North America. The drug is still widely abused by bodybuilders to increase muscle mass. The question is whether it is really Parabolan that is being injected. Since the drug is no longer manufactured by pharmaceutical companies, all production takes place in Southeast Asia, Mexico, and Eastern Europe. There are some clandestine laboratories that make the drug, but the quality and purity of the product is in question.The drug when injected is slowly absorbed into the body and remains in the body for 3-7 days. Parabolan has been shown to increase protein synthesis and induce positive nitrogen balance. Most bodybuilders claim that it increases appetite, decreases muscle breakdown, and also aids in recovery after injury.