Hoping to get your pearly whites brighter? Try radioactive toothpaste! Is that a sad, boring piece of toast? Spread on some radium butter for a tasty treat. Looking worn out? Don't forget to treat your skin with radium cosmetics, for that bright, youthful look.
Considering what we now know about the dangers of radiation, these products seem preposterous. But they were real. In the early 20th century, the harmful effects of radiation exposure weren't fully known until a group of women in New Jersey paid a fatal price for us to find out.