I'm fine with it as long there's data to backup the claim. What we shouldn't do is claim that a certain tea is able to cure something like "long covid" when 1)

I'm fine with it as long there's data to backup the claim. What we shouldn't do is claim that a certain tea is able to cure something like "long covid" when 1) it ranges from being tired to brain damage and 2) is not backed up by anything. And I'd say the same if it was some random drug being recommended.