In Colgate’s case, the brand began using North American peppermint and spearmint oil to flavor their toothpaste in the late 1800s. That’s a long time to make a case for the cool-tasting leaf ...

Additionally, another strain of bacteria, called Paracoccus yeei, was discovered in a batch of Tom's Wicked Cool! Anticavity Toothpaste. Tom's of Maine toothpaste is seen on a shelf, March 28 ...