First thought - somebody made a toothpaste that tastes like soap and just called it soap. LMAO. You can brush your teeth with anything - or nothing. Charcoal is good - people have (still?) brushed their teeth with ashes from a fire. Doesn't mean that any of these methods are *peer reviewed* compared to other methods, no? Soap (generic lye) doesn't kill bacteria - I don't know the process by which toothpaste kills/removes bacteria, but the chemicals kill and all that foaming is pretty good (but definitely not perfect) as a transport mechanism when you spit/rinse. As I said before - the *power of soap* is the surfactant properties that make it easier for dirt/gunk/bacteria/viruses to be *washed away with large quantities water*. Brushing teeth with soap isn't doing any good if the bacteria just float around for a bit and then redeposit back exactly where they were just brushed from. That's why hand sanitizers have alcohol in them - to kill bacteria, because they don't *wash away* bacteria. Hand sanitizer is just moving bacteria from one hand to the other, etc, and without the alcohol, they would be pointless. The other issue with the article is that it says glycerol leaves a film and the teeth can't regrow. **SOURCE??** Teeth should regrow from the inside out. What mechanism is there for adding to teeth from your mouth? that makes no sense to me. Dentists are now *sealing* teeth to keep cavities from forming. If teeth grew from the outside in, there would be tons of problems by now.