I have no idea how real or useful this thing is. The only thing I do know is that I've been using this stuff since I was a kid, and that when I use it on the various cuts and scrapes that WZ gets, not to mention all the mosquito bites which he scratches too hard and breaks the skin. The wound is noticeably better after application for a day or two. I guess if it has been around for such a long time it must work to some extent? Hmm... though I do believe the tin has gotten smaller through the years.