However, clenbuterol is still not recommended for weight loss as it has many dangerous side effects. Check them out in the next section. Halotestin tablets weight loss pills and diets lead to loss of lean muscle mass. But, that is not the case with clenbuterol. Clenbuterol is catabolic, which means it breaks down fat, but it is also anabolic, meaning it prevents the loss of muscle Halotestin steroid stimulates the growth of skeletal mass 78.