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

Reference ranges differ between labs, so comparing two reports is close to meaningless.

Batch and expiry copied from a real box will already be nearly expired. That is the tell.

Half of what people describe as tolerance is a change in the underlying condition, and the two need different answers.

A certificate of analysis answers one question and gets quoted as though it answers four. Not on selenium but the pattern is familiar.

Changing prescriber does not reset anything, and people discover that the hard way.

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