Most other toothpastes contain gritty abrasives: sand, bone and chalk that can damage teeth by thinning the enamel layer. This causes teeth to yellow, increases sensitivity to heat and cold, and irritates gums. PEELUs patented Fiber-Clean formula helps prevent the formation of plaque which can lead to unsightly tartar and stains. It brightens and cleans teeth without harming enamel or gums. PEELU is so mild and non-abrasive it reduces many problems associated with regular brushing, such as mouth and gum irritation and worn tooth enamel.