Tea Tree Therapy Whitening Toothpaste with Tea Tree Oil provides extra whitening, especially if teeth are stained. Dicalcium phosphate and silica are gentle, low-abrasive polishers. These are the same ingredients dentists use to polish teeth after a dental cleaning. The natural antiseptic properties of tea tree oil inhibit the growth of bacteria that cause plaque and tooth decay. It aids in the treatment of gum conditions and helps control mouth ulcers and bad breath. The formula contains no artificial sweeteners or fluoride and has a pleasant natural mint flavor.