A Chinese herb used in remedies for common ailments such as eczema, acne, liver symptoms, arthritis, and chronic pain remains a worldwide health threat due to its availability online. Approximately 20 years ago, a cohort of young female patients in Belgium presented with a rapidly progressive kidney disease.
Physicians traced the cause of the epidemic to a weight-loss clinic that had treated the women with a Chinese herb containing aristolochic acid (AA). Today, renal disease caused by AA is referred to as aristolochic acid nephropathy, or AAN.