“Long-… melatonin administration (10 mg/kg, 30 days, daily) to … intoxicated rats diminished the toxic effects of CCl₄ , reducing elevated plasma activities of alanine aminotransferase and aspartate aminotransferase and bilirubin concentration, prevented accumulation of … lipid peroxidation products in rat liver and resulted in apparent preservation of the mitochondrial ultrastructure.”