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c/bloodwork·posted 8 months ago by u/cormac_erdogan

genuine question about ALT that I am slightly embarrassed to ask

Question

The title is the whole question — genuine question about ALT that I am slightly embarrassed to ask — but here is why I am asking.

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.

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

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.

Screenshot none of this. Read the whole thread, including the parts where I am told I am wrong.

257 up / 80 down76% upvoted17 commentsid xspmn24 Nov 2025

17 comments

15 in this archive, depth 4

best — the order this archive was captured in

u/anders_vermeulen32 points·8 months ago

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.

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[deleted]24 points·8 months ago

[deleted]

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u/peptidemeter_pat15 points·8 months ago

lab reference ranges are not treatment targets

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u/jarno_karlsen8 points·8 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/cormac_erdoganOP3 points·8 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/blank_injection2 points·8 months ago

fasting state and time of day change more than people expect

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u/hedda_adeyemi24 points·8 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/hugo_pires-30 points·8 months ago

do not change three things and then read the panel

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u/osman_eriksen1 point·8 months ago

This. Reference ranges are population intervals, not targets, and conflating them causes a lot of unnecessary alarm here.

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u/kaia_kuusela1 point·8 months ago

bring the numbers to someone qualified to read them

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u/cormac_erdoganOP1 point·8 months ago

What did the repeat show?

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u/cormac_erdoganOP1 point·8 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/mateusz_achebe10 points·8 months ago

Push back: a value just outside a reference interval is a common finding in healthy people. It is a reason to repeat.

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u/jonas_cardoso12 points·8 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/greta_chukwu8 points·8 months ago

Right, and weight loss itself moves several markers, so attribution is harder than these threads assume.

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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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