In Greek mythology, apples had the taste of honey and were considered to cure all diseases, while in American traditional medicine, the apple is described as the "king of fruits".
But the apple does something else, which many probably do not know: Perfectly cleans food debris in the teeth!
If you do not want to use toothpaste or it is somewhere where the toothpaste is not available, try to "brush" your teeth with an apple. Just by eating it.
The result will amaze you. Your teeth will grit from cleanliness, while your breath will be naturally scented.