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c/bloodwork·submitted 7 days ago by u/micro_bump_mick

[Concerning] ferritin 9. i was eating 1,100 calories and calling it discipline.

Concerningbranch of 6 comments

The title is the argument: ferritin 9. i was eating 1,100 calories and calling it discipline. Here is the rest of it. Reference intervals are typically the central 95% of a reference population. By construction one person in twenty falls outside one on any given test without anything being wrong. The confounding…

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6 comments, started 7 days ago
u/ferran_halonen21 points·7 days ago

Different laboratories use different assay platforms with different calibration. Comparing across labs adds a systematic offset that is invisible on the report.

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u/gentle_correctionMOD13 points·6 days ago

Standing reminder: nobody here interprets your results, and posts asking us to get a pointer to somebody who can.

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u/diego_sorensen17 points·6 days ago

draw at the same point in the week if you want comparability

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u/mikkel_kimani10 points·6 days ago

Yes. Repeat before you react. Almost every alarming single value I have posted here regressed on the repeat.

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u/isabela_guerrero10 points·6 days ago

Is that the same assay, or did the lab change platforms?

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u/elin_varga11 points·6 days ago

Is that the same assay, or did the lab change platforms?

This is the sentence to read before anybody panics about a single value.

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What to measure before you start, what to re-measure, and how to interpret movement without panicking. ApoB over LDL-C, HOMA-IR as a crude free tool, ALT and the fatty-liver story, eGFR noise during rapid loss, and the deficiencies that a 1,100-calorie appetite will hand you.

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