Shapiro MD Shampoo contains three powerful and natural active ingredients that have been shown in clinical studies to block the effects of DHT (dihydrotestosterone), the hormone that is widely believed to be a leading cause of hair loss. This patented formula is designed for use by men and women of all hair types. Shapiro MD Shampoo contains three powerful and natural active ingredients that have been shown in clinical studies to block the effects of DHT (dihydrotestosterone), the hormone that is widely believed to be a leading cause of hair loss. This patented formula is designed for use by men and women of all hair types. For best results, use with the Shapiro MD Conditioner and Daily Leave-In Foam. Individual results may vary.