It Strengthens Your Teeth
It Keeps Your Mouth Clean
Drinking juice, soda or sports drinks may help you wash down your dinner, but they can leave unwanted sugar behind on your teeth. The cavity-causing bacteria in your mouth love to eat sugar and produce acid that wears away enamel, which is the outer shell of your teeth. Many of these drinks also have added acids (phosphoric, citrus or malic acid) to make them taste less sweet, but those acids also cause trouble by eroding away enamel.
Water, however, cleans your mouth with every sip. It washes away leftover food and residue that cavity-causing bacteria are looking for. It also dilutes the acids produced by the bacteria in your mouth. You’ll still need to brush twice a day for two minutes and clean between your teeth, but drinking water through the day will go a long way toward keeping your smile cavity-free.

