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c/bloodwork·posted 11 months ago by u/cormac_erdogan

[Results] 51 weeks on 1.7mg, full numbers, ask me anything boring

Results Long Haul ×7 Well Actually ×2 Receipts ×2

51 weeks on 1.7mg, full numbers, ask me anything boring, logged the same way every week so the comparison is at least internally fair.

51 weeks and 1.7mg — those are the numbers, and they are the ones I am willing to defend.

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.

ApoB counts atherogenic particles rather than the cholesterol they carry, which is why it can diverge from LDL-C and why it is the addition most worth making.

Tell me where this is wrong. That is the useful part of posting it.

3,668 up / 706 down84% upvoted35 commentsid dwnqo28 Aug 2025

35 comments

30 in this archive, depth 5

best — the order this archive was captured in

u/andres_restrepo433 points·11 months ago

Nobody here can interpret your panel and this comment is not doing so. What a board can usefully do is help you ask better questions of somebody who can.

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u/britt_marchand349 points·11 months ago

ApoB is the one worth adding if you only add one

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u/cormac_erdoganOP222 points·11 months ago

Took a baseline the week before starting purely because this board told me to. Best five minutes I have spent on this.

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u/anya_rautio70 points·11 months ago

assay method matters, especially between different labs

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u/cormac_erdoganOP42 points·11 months ago

assay method matters, especially between different labs

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

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u/valeria_karlsen32 points·11 months ago

lab reference ranges are not treatment targets

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u/cormac_erdoganOP0 points·11 months ago

Correction: that marker is reported in different units by different labs, which explains the tenfold difference you are seeing.

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u/yara_boateng1 point·11 months ago

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

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u/transit_variance213 points·11 months ago

Substantial weight loss independently moves lipids, liver enzymes and several other markers. Attributing a change to a compound while losing weight is confounded by design.

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u/micro_bump_mick-14 points·11 months ago

Draw at the same point in the week now, fasting, same lab. The noise dropped enormously once I standardised.

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u/laila_yilmaz1 point·11 months ago

Small fix — a reference interval is not a treatment target, and the post above uses them interchangeably.

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u/hedda_adeyemi61 points·11 months ago

Agreed. The trend is the signal. A single value is a snapshot of one morning.

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u/cold_chromatogram31143 points·11 months ago

Same lab as the previous draw?

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u/janek_ferrari131 points·11 months ago

Compared two draws across two labs and spent a week worrying before finding out the assays were different.

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u/gentle_correctionMOD75 points·11 months ago

Left up. It is a question about how to compare panels, not a request for interpretation.

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u/bence_zamora79 points·11 months ago

Added ApoB to the panel after a thread here. It told me something the standard lipid panel had been hiding.

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u/tidy_vialdrawer_watch61 points·11 months 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/rekha_mwangi47 points·11 months ago

Time of day, fasting state, hydration and recent exercise all move common markers. Standardising the draw conditions is free and it removes most of the apparent variability.

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u/chidi_abubakar28 points·11 months ago·edited

Different laboratories use different assay platforms with different calibration.

tidy_vialdrawer_watch is right that a reference interval is not a target. It is a description of a population.

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u/yara_mensah21 points·11 months ago

one measurement is a point, two is a line, three is a trend

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u/india_generic_g25 points·11 months ago

Tracked ApoB against the weight trend for a year. The correlation was much weaker than I expected and that was worth knowing.

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u/thermal_mass_tom111 points·11 months ago

Do you have a baseline from before you started?

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u/copay_card_cc56 points·11 months ago

How many weeks between the two measurements?

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u/anya_rautio26 points·11 months ago

How many weeks between the two measurements?

Adding the obvious one — take it to whoever ordered the panel. This board cannot read it for you.

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u/santiago_rasmussen38 points·11 months ago

Repeat testing before acting is standard practice for a reason: regression to the mean does a lot of work on single outlying values.

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u/anders_vermeulen18 points·11 months ago

Same view — ApoB if you add one thing. It answers a question the standard panel only gestures at.

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[deleted]14 points·11 months ago

[deleted]

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u/india_generic_g17 points·11 months ago

baseline before you start is worth more than any later panel

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u/elise_grimaldi29 points·11 months ago

My ALT moved and I spent a fortnight convinced I knew why. The repeat six weeks later was back in range and I had changed nothing.

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u/emeka_chowdhury23 points·11 months ago

That comparison crosses two labs with different assays. The difference you are describing may be the method.

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About c/bloodwork

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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