From wiki:Sozodont fell out of favor with consumers in the early twentieth century amid concerns about side effects of its usage. As early as 1880, however, one dentist complained, "I will testify to what is so well known to most dentists, viz., that it [Sozodont] destroys the color of the teeth, turning them to a decidedly dark-yellow." At the turn of the 20th century, another dentist echoed this complaint, stating that "The liquid of Sozodont . . . is far too alkaline for general use, and would in time destroy the enamel of the teeth and make them yellow." Link
Hey that how they wanted to advertise NBC."NBC it really doesn't suck"But the truth in advertising laws put the kibosh on that.
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