If you want to keep your teeth, add more greens to your mouthwash. Green leaves are known for their high health benefits.
Research has shown that green leaves also contain a molecule called 'nitrate' that offers even greater benefits for oral health. It is also possible (and desirable) in a salad, but if you combine parsley in the mouthwash, your gums will thank you. The Center for Disease Control and Prevention has published a list of foods whose consumption helps prevent illness. On the IFL Science website, they will also include in this list the content of nutrients per calorie for each of the green leafy vegetables.