What does toothpaste actually do?

Helps Clean+Fluoride: It is like a polishing compound with Fluoride in it. The toothbrush does the most work and is by far the most important but the toothpaste with Fluoride helps to remineralize damaged enamel to help prevent cavities. I don't endorse any toothpaste, just make sure it has Fluoride and use it often. Be cautious of those claiming to "proven better than" another brand. Wording is everything.

See Toothpaste : See toothpaste ingredients and what they can do on the internet. Too numerous to list here depending on the brand can vary considerably.

Most important: The most important is anti microbial from the fluoride.

Detergent: It acts as a detergent to help scrub your teeth to reduce bacterial plaque and the flavorings help your mouth feel cleaner.