[header] How to choose a toothpaste [title] Check for fluoride. [step] It's important that your toothpaste contains fluoride, as it helps strengthen the enamel of your teeth. Your enamel is under constant attack from acids, and fluoride remineralizes the entire structure. 
Make sure fluoride is an ingredient in any toothpaste you buy. It should be 1 , 000 parts per million in your toothpaste.