Narrow conclusion. How long have you been on nicotine?

Underdosing and tolerance are indistinguishable from the inside, and everyone picks the flattering explanation.

Function over score.

Most of what is called evidence here is one person, one vial, one month.

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

Changing prescriber does not reset anything, and people discover that the hard way. Two months in on a gym routine and it lines up.

Function over score.

Careful with attribution. You changed the timing, the dose and the season. That is three variables.