Short answer first, then the reasoning. The single most useful discipline is bringing the whole panel to a clinician rather than one flagged value. One out-of-range result in isolation generates anxiety and unnecessary tests; the same result next to the trend and the rest of the panel usually generates a shrug.

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

pete_manc_UK said:

The single most useful discipline is bringing the whole panel to a clinician rather than one flagged value.

Agreed, and reference ranges are laboratory-specific. Comparing your number to somebody else's range, or to a screenshot from another country, is how people convince themselves something is wrong.

CryptoCarl said:

My prescriber ordered three tests and this board recommends about twenty, and I would like to know which of those two lists is right.

Same position here, arrived at the long way round. Quarterly for the first year is convention rather than evidence, and it is defensible for a simple reason: it is roughly the interval over which HbA1c becomes informative again, since it reflects about three months of glycaemia. After the first year, and once doses are stable, annual is reasonable unless something specific is being followed.

Clinical perspective, offered as context rather than as advice.

Shot day Friday report relevant to baseline bloodwork:

Week 22. Currently on 0.5mg. Down 18 lbs from starting weight of 230 lbs.

This week's observations: Slight injection site redness, resolved in 24h.

Labs due next week — looking forward to seeing the metabolic panel. I'll post results in the Lab Results section when they come in.