How do you tell the difference between the drug working and just a good week?

“Registered with” is doing an enormous amount of work in that sentence.

Worth asking what specifically was measured. Pain scores move with mood and function does not.

A certificate of analysis answers one question and gets quoted as though it answers four. Three weeks in on whey protein and it lines up.

Following this because I am in the same place and have no idea what to ask at the appointment.

You have two changes at once here. You cannot attribute anything until one of them moves.