Count the number of your teeth

Normally, adults should have 32 teeth. Fortunately, most Chinese only have 28. Why?

Think about it.

Then, let's discuss.

Friendly remind of not consuming gypsum-bearing Tofu. I often eat Tofu like most folks, but have not eaten gypsium-bearing one since I realized the hazard material - CaSO4 was used for making Tofu.