Conventional toothpastes aren't the greatest. Somewhere down the line, flavor and shelf life became more important than safety and effectiveness. In addition to artificial sweeteners, traditional toothpastes contain harsh chemicals, preservatives and fluoride, which is continuously being unveiled as toxic and detrimental to our health. that is why all need to make his or her own tooth past. But don't fret, because making your own toothpowder is super easy and pretty inexpensive.