If you cut back on sugar a lot, that almost surely is the most major factor in the change. Sugar is amazingly bad for your teeth, and many sugary beverages (lik

If you cut back on sugar a lot, that almost surely is the most major factor in the change. Sugar is amazingly bad for your teeth, and many sugary beverages (like soda) are also naturally acidic, which leads to erosion of enamel. That said, you're right to have some skepticism about heavily marketed tooth pastes. For instance, I have four veneers and my dentist recommended against using any "whitening" toothpastes, because they're naturally abrasive against your teeth and can very slowly damage them over time. I just use Sensodyne and follow-up with a non-alcoholic flouride mouthwash, and I've had no dental issues since, even with a sugary diet. But I brush/rinse three times a day.