[Severe nephrotic syndrome in a young man taking anabolic steroid and creatine long term].

Anabolic steroids and creatine supplementation is one of the current abuse used by body builders. It is less known that this combination beside of many deleterious effects may also cause renal damage. Authors report a case of diffuse membranoproliferative glomerulonephritis type I in a 22-year-old man who had been taking continuously methandion in a large quantity and 200 grams of creatine daily, and was sent to the outpatient nephrologic unit with typical clinical signs of nephrosis syndrome. They also call attention to the role of the continuously consumed creatine in the renal failure.