Writing this once so I can stop repeating it across threads. It is about the baseline and follow-up panel, and it is deliberately narrow — everything I am not confident about is marked as such.
What is actually established
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.
The condition it depends on
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.
The practical version
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.
What I am not sure about
What would genuinely help is knowing how often to repeat it, because quarterly seems to be the convention and I cannot find the reasoning. Not looking for reassurance. Looking for the part I have got wrong.
MASHdoc_SA 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…
No disagreement with MASHdoc_SA. One condition attached. 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.
MASHdoc_SA 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…
Filing a mild objection. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit. I would drop the "get everything" instinct further than this thread does. Every extra test is another chance at a false positive, and incidental findings have their own cost in scans, biopsies and worry.
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Browse GL BiochemShort answer first, then the reasoning. 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.
Dr.LipidDallas said:The single most useful discipline is bringing the whole panel to a clinician rather than one flagged value.
Agreed, and ALT falling is not the same as fibrosis improving. Enzymes are a crude proxy; FIB-4 or elastography is what tells you about the thing that matters.