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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

Quick one. Canada here.

ferritin works very differently where I live than in the threads that dominate the front page, and I keep seeing people confidently given advice that simply does not apply outside the US.

Specifics: the route I used took 7 weeks and cost roughly what I expected. The admin was worse than the cost. The thing that would have saved me the most time was knowing which document to ask for at the start.

Happy to answer questions from anyone in the same jurisdiction.

1,032 up / 22 down98% upvoted28 commentsid 2sgwzr15 Jul 2026

28 comments

6 in this archive, depth 2

best — the order this archive was captured in

u/burned_once_twice87 points·13 days ago

Yeah, baseline matters more than any later number.

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u/constipation_clubside effects70 points·12 days ago

The practical rule people converge on is 28 days at fridge temperature after first puncture, and that comes from the preservative, not the peptide.

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u/sanne_novak16 points·12 days ago

What are your reference ranges?

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u/yara_antonsen38 points·12 days ago

Dead space in the needle hub holds a small but non-trivial volume. On low-volume draws that can be several units.

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u/liv_okafor12 points·12 days ago

Baseline TSH: 98.3. Week 89: 96.8. Same lab, fasted, same time of day. Trend matters.

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u/cold_chromatogram3122 points·14 days ago

Disagree. What you are describing is consistent with bloodwork, not with what you concluded.

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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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