This really works, with 2 squirts in my dogs mouth once a day, after a couple of days his breath is so much better. You just apply it on the gums and that is it. My dog likes it he wants to eat this every time. but no worries it is completely safe for use. It is made with; Purified water, Glycerin, Peppermint and Spearmint Flavors, Sodium Benzoate, Potassium Sorbate, Polysorbate, Aloe Vera Extract, Sodium Bicarbonate, Dye, Stevia. Which this is all made to fight foul breath, plaque, and tarter buildup. It states you do not have to brush your dogs teeth but it won’t hurt to do so. I was luck enough to have gotten this for free.