Anabolic steroid use causes decreased levels of HDL or "good" cholesterol, increased levels of LDL or "bad" cholesterol, and serious liver toxicity within 12 weeks, according to a study that measured the effects of anabolic steroids on men with HIV wasting disease.
Scientists at UCSF's Gallo Clinic and Research Center have shown that a brain molecule essential for wakefulness and appetite also plays a central role in strengthening neuron communication that leads to addiction.