Shapiro MD Leave-In Daily Foam contains our patented formulation with three potent, naturally occurring ingredients that have been clinically shown to help fight the effects of DHT, the hormone that is widely believed to be the cause of hair loss in men and women. This product was designed for use with the Shapiro MD Shampoo and Conditioner. See visibly thicker, fuller & healthier looking hair with Shapiro MD's Leave-In Daily Foam after only a few uses. Directions: Apply 1-2 pumps to palm, rub hands together, and evenly distribute through hair and directly to scalp in the morning or evening. Designed for once daily use.