Toothpaste

Radiation and medicine have had a troubled, lengthy history. People once believed that the more radiation they could absorb into their body, the better. There were toothpastes, tinctures, and tonics made from radioactive materials in the past.

Thorium served as the (radio)active component in Doramad, a toothpaste created by the German business Auergesellschaft a century ago. Doramad was promoted as being excellent for preventing gum disease and shining teeth. Tho-Radia, a range of radioactive cosmetics, was sold in Paris at the same time.

The radiation would bolster your teeth's and gums' defenses, as stated on the label. The toothpaste was produced by the same manufacturer, and the thorium utilized was derived from monazite, the same sands that were obtained from Guarapari Beach. Overall radiation levels were minimal, so it's unlikely that anyone used the toothpaste to bad effect. Having said that, if you ever get the opportunity, refrain from using radioactive toothpaste.