My rule, after years of this: if it cannot survive being written down with the numbers attached, it is marketing.

Loose evidence and no evidence are different, and people overcorrect in both directions. Three weeks in on vitamin D3 and it lines up.

You have two changes at once here. You cannot attribute anything until one of them moves. Not on cefuroxime but the pattern is familiar.

A plausible mechanism is not an outcome, and this class is the textbook example.