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c/bloodwork·posted 14 days ago by u/greta_chukwu

[Question] my TSH moved 0.4. is that anything.

Question Cold Box ×3 Sourced ×1

The title is the whole question — my TSH moved 0.4. is that anything — but here is why I am asking.

Brought the whole set to my clinician rather than one flagged value. Completely different conversation.

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

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

Ask me anything specific. Anything general I will probably get wrong.

1,032 up / 22 down98% upvoted32 commentsid 2sgwzr15 Jul 2026

32 comments

10 in this archive, depth 4

best — the order this archive was captured in

u/burned_once_twice87 points·13 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/constipation_clubside effects70 points·12 days ago

nothing on this board interprets your results for you

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u/sanne_novak16 points·12 days 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/kenji_kimani34 points·12 days ago·edited

Disagree with reading anything into that. One value, one morning, and you changed two other things in the same window.

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u/greta_chukwuOP28 points·12 days ago·edited

do not change three things and then read the panel

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u/greta_chukwuOP-18 points·12 days ago·edited

Have you taken this to whoever ordered it?

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u/ahmed_fonseca1 point·11 days 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_antonsen38 points·13 days ago

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

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u/cold_chromatogram3122 points·12 days ago

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.

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u/liver_enzyme_liz13 points·12 days ago

Reference intervals are typically the central 95% of a reference population.

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

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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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