A narrower follow-up, since the general answer is now clear:

How long did you give it before you decided it was working?

Dr.Martinez said:

It is worth asking what the claim would look like if it were false.

Filing a mild objection. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit. Pushing back on the anecdote-stacking. Twenty people reporting the same thing is twenty samples from the same self-selected pool, not twenty independent confirmations.

I would rather be corrected than agreed with, if it comes to it.

Dr.Martinez said:

It is worth asking what the claim would look like if it were false.

Correct, and worth adding that it is reversible. Nothing being described here is a one-way door, which changes how cautious it is reasonable to be.

Dr.Martinez said:

It is worth asking what the claim would look like if it were false.

Bookmarking. The distinction being drawn above is the one nobody else makes.

Adding the clinical framing, because it changes how the question reads. Start from the measurement rather than the conclusion. Almost every disagreement here turns out to be two people measuring different things and comparing the numbers anyway.