Toothpaste even though (in some form or another) has been around as long as the Ancient Greeks have, the formula (as we know it) did not become popular until World War I. As soon as companies began manufacturing toothpaste, people began to purchase the magical concoction - guaranteed to produce glistening teeth! White teeth were all the rage after World War I had ended, and toothpaste quickly became a product that most people simply couldn't live without.Chalk, That's right - chalk. Thanks to the fact that chalk is made from exoskeletons, it's hard enough to remove all of that caked on gunk from your pearly whites. Chalk dust may cause lung problems if inhaled via toothpaste, and swallowing a bit of chalk could cause bleeding.