Acute kidney injury associated with androgenic steroids and nutritional supplements in bodybuilders(†).

Four bodybuilders who injected anabolic steroids and ingested commercial protein (78-104 g/day) and creatine (15 g/day) products presented with serum creatinine levels between 229.84 and 335.92 µmol/L (2.6-3.8 mg/dL). Renal biopsies revealed acute tubular necrosis. Four weeks after discontinuing injections and supplements, serum creatinine was in the normal range and estimated glomerular filtration rate > 1.00 mL/s (60 mL/min), including two patients with biopsies showing >30% interstitial fibrosis and tubular atrophy. The findings highlight a risk for acute and potentially chronic kidney injury among young men abusing anabolic steroids and using excessive amounts of nutritional supplements.