One concrete data point for the thread. Post reference ranges alongside numbers when you share them. Units differ by country — glucose and lipids especially — and half the confusion in these threads is unit mismatch rather than disagreement.
Following on from jim_asheville — and this may be the naive question:
How often to repeat it, because quarterly seems to be the convention and I cannot find the reasoning?
SleepDoc_PDX said:Post reference ranges alongside numbers when you share them.
There is a second half to this that has not been said yet. A defensible baseline is short: HbA1c and fasting glucose, a lipid panel with ApoB if you can get it, ALT and AST, creatinine with eGFR, TSH, ferritin and B12, and a full blood count. That set catches the things that change, the things that explain symptoms, and the things that alter the prescribing decision. Almost everything else on the long circulating lists is either invariant, uninterpretable without a specific question, or an incidental finding waiting to cause an unnecessary workup.
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Took the whole panel in rather than the one flagged line, and the conversation lasted two minutes instead of generating three more tests.
Dr.NutriCornell said:A defensible baseline is short: HbA1c and fasting glucose, a lipid panel with ApoB if you can get it, ALT and AST, creatinine with eGFR, TSH, ferritin…
Agreeing with Dr.NutriCornell, and the qualification matters more than the agreement. One addition: if the lab changes analytical platform between your draws, the comparison breaks and nobody tells you. It is worth asking when a value moves inexplicably.