All subjects had their liver enzymes tested before, at 10-day intervals and at the end of the eight-week study. They all used the same training program and ate the same diet. At baseline all groups showed normal liver enzymes, with one exception. The amount of creatine kinase, an enzyme linked to exercise-induced muscle damage, was elevated in all groups, but it was considered normal. At the end of the study all groups had elevated liver enzymes, but the amount in both the drug-free control group and the Compound N group were still in the normal range. Those who took steroids but not Compound N had liver enzymes significantly above the normal range as well as liver damage, but those who used the nutrient combination did not.