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He sold tooth powder door to door and delivered wine for a time.

Rani doesn't have tooth powder, but she shows me how to brush my teeth with a fresh twig from a neem tree.

They then used chemicals and enzymes, followed by a washing protocol, to isolate the DNA in the resulting tooth powder.

One of the things they tried was some Pepsodent tooth powder, a predecessor to modern toothpaste.

In the first they sample decades old corn chips, century-old Civil War hardtack and then freshen up with 100-year-old tooth powder.