Add Yahoo as a preferred source to see more of our stories on Google. How does purple toothpaste work? It uses color theory’s principle of complementary colors. Complementary colors are shades that ...

Nano-hydroxyapatite toothpaste is a fluoride-free alternative. This is who dentists say it's best for. Anna Gragert Senior Editor, Health and Home Anna Gragert (she/her/hers) was previously the ...

Here's a fun fact: Toothpaste works to clean your teeth through the use of slightly abrasive substances, among other things like fluoride. Those little abrasive chemicals work to dislodge gross stuff ...

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