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

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

Photograph everything before you open it. Ten seconds, settles most disputes.

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. Eight months in on the blister foil and it lines up.

Most of the popular protocol is borrowed from a clinical population and applied to healthy people without comment.