traveltech_sara said:

The useful checklist is about verifiability rather than presentation.

Saving this. It is the first explanation that did not require me to already understand it. I will report back once I have actually tried it.

Adding the clinical framing, because it changes how the question reads. The distinction that resolves most of these threads is between what is true on average and what is true for one person. Both are real; they answer different questions and get quoted as if they were the same one.

Dr.NutriCornell said:

Vendor reputation tracking for vendor vetting: I maintain a personal spreadsheet with every order I've placed — date, vendor, batch number, Janoshik…

I read this differently from Dr.NutriCornell, on substance rather than tone. The objection nobody has made: this only works if the measurement is doing what we assume it is doing, and that assumption has not been tested here.

If somebody has the primary source to hand I would rather cite it than paraphrase it.

One concrete data point for the thread. Worth stating the units and the reference range whenever you post a number here. A large fraction of the apparent disagreement in these threads is two people using different units and both being right.

Moderator note: leaving this open. It is being argued well and the disagreement is the useful part.