Saliva plays a huge part in the health of your teeth and mouth. As well as controlling bacteria, it washes food particles away. It also delivers minerals and chemicals necessary to keep the surfaces of your teeth hard and protects against infection. If you don't make enough saliva you'll suffer discomfort and bad breath.

To boost saliva levels:
Always drink when you feel thirsty.
Consider alternative medicines if the ones you use cause a dry mouth.
Limit alcohol and caffeine consumption.
Chew sugarless gum to stimulate saliva flow.