Let’s face it. Modern people eat a lot of processed foods with hidden sugars. That is why dentists recommend using a toothpaste that contains fluoride, which will help strengthen your teeth against cavities. Any brand will do. Most contain fluoride unless they are promoted as “all-natural” or “organic” but even some of these contain fluoride so it’s best to check the active ingredients list.
If your teeth are particularly sensitive, you may enjoy the Sensodyne brand.