it gets worst , since people also buy into the flouride free toothpaste, usually with or without nHA, and what a surprise the people in the reviews for those toothpaste ends up having bad teeth and still cavities. the people reporting thier "teeth or whiter or fresher attributes to it being nHA or flouride free, but dont account for the amount abrasives and whitening agents in these toothpaste, and since its not really standardized, since theres many different toothpastes flouride free made by different companies, people have reported allergies to it(ulcers or chelitis)