Underbrush is an all natural gum that is free of any chemicals or artificial ingredients. It has a purpose, and the purpose is to keep your teeth healthy. The company isn’t concerned about how long the flavor lasts, they are concerned about how it’s going to help your teeth in the long run. with prolonged chewing, it helps eliminate bacteria, can reduce plaque and also re-mineralize the teeth. The taste is really good, slightly minty, and it is made with sap and when you’re chewing this gum, there is a definite difference between this and the types of artificial gums that we get at the store.