1. Radium Bread
Marie and Pierre Curie discovered Radium, a naturally occurring element, in 1898. It was soon thereafter adopted as a key ingredient in an array of cosmetic and health products that were falsely marketed for their curative properties. Of course, radium is radioactive, and if ingested, about 20% of it winds up in the bloodstream, causing cancer and other severe health consequences. These radium-based products were all real, and were sold to a market that wouldnt know any better until it was too late.
The process of making radium bread is the same as making standard bread, except you use radium-infused water instead of non-radioactive water. It was manufactured by the Hippmann-Blach bakery in what is now the Czech Republic.