system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why isn't there toothpaste that's "Whitening" & "Enamel protection" & "3-in-1 plaque defence" etc. Is there actually a big difference between them all?
gpt
So, whitening toothpaste and to a much greater extent the professional whitening treatments are pretty hard on your enamel and can damage the teeth the roots, which is the exact opposite of the enamel protection.

Think of the enamel protection as something like putting polyurethane on a table and the whitening is like scrubbing it or even sanding it.  Those two things don't really work together.