I used to buy this for a son with acne, who used it begrudgingly - it worked, but the sulfur odor did not exactly impress his girlfriends. He's grown now but has had a recurrence of skin irritation on his forehead due to wearing a head covering while cooking (he's a sous chef/kitchen manager) He tried everything before coming to me to ask me to get him some of that Grand;pa soap - and it STILL works where other remedies failed!