This article documenting the radium skin care trend from the 1920’s and 30’s is fascinating.
“Radior” Chin straps are guaranteed to contain Radio-active substance and Radium Bromide. If placed on the face where the skin has become wrinkled or tired the radio-active forces immediately take effect on the nerves and tissues. A continuous steady current of energy flows into the skin, and before long the wrinkles have disappeared, the nerves have become strong and energised, and the tired muscles have become braced up and “ready for service.”
(Radior advertisement, 1915)
It was thought to literally give you a glowing complexion!