Back in the 70s, a dentist in a rural area of Hawaii mentioned that the teeth are each associated with an organ and they can be remineralized. There are tiny tubules that transport micronutrients to the teeth, but there are also dietary and herbal components that promote the salivation necessary for success. Naturally, minerals such as calcium, phosphorus, and silica are needed but saliva plays a key role since there are both interior and exterior sources of the minerals needed by the teeth. Acids, of course, erode the enamel so the correct pH needs to be considered along with foods that affect the acid-alkaline balance. There has been press about glycerin, a popular ingredient in most toothpastes, but the issue appears to be the stickiness, not the chemistry. If the teeth are truly clean, remineralization is more likely.