People used to eat arsenic to improve their skin. You've probably heard about how arsenic was found in many of the Victorians' favourite cosmetics, but it gets worse. There were also edible products on the market in the late 1800s, such as Dr. James P. Campbell's Safe Arsenic Complexion Wafers. They advertised that they could remove freckles, blackheads, and other "facial disfigurements." That has to be one of the most intriguing facts you've learned in a long time.