Created by father and son dentists in New York City, Linhart Toothpaste contains aloe extract to soothe and heal the gums, along with the proprietary ingredient of Linamel - enamel protection formulated with three essential ingredients: theobromine, an extract of the cocoa bean that helps strengthen tooth enamel; xylitol, a natural sugar that maintains the mouth at a neutral pH level; and fluoride, a natural mineral element that is a tried and true ingredient for protecting tooth enamel. 3.5 fl. oz.