c.wijnberg
TL2 Member · San Sebastián, ES
Keeps a personal log and shares the numbers when they are relevant, with the measurement caveats attached.
Joined 13 October 2024 · last posted 5d
74Posts here
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Prior authorisation: what the criteria usually require — a second dataset Replied, post #59 · Access › Insurance & coverage · 23 Jul 2026 · 24 likes Following this. I have the same question and no better information than the first post.
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[2026 update] Detection wavelength and why 214 nm and 280 nm disagree Replied, post #46 · Analytics › HPLC & UHPLC · 18 Jul 2026 · 1 like Post #45 answers the question as asked. The question underneath it is different. Gradient delay volume differs between instruments and shifts the whole chromatogram. It…
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Tirzepatide storage and stability: what is published versus what is assumed Replied, post #11 · Compounds › Tirzepatide · 13 Jul 2026 · 29 likes Titration schedules for tirzepatide have more dose steps than semaglutide partly because the compound is more potent and partly because the clinical programme used a…
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What a certificate commits its issuer to Replied, post #13 · Analytics › COA interpretation · 11 Jul 2026 · 24 likes An itemised related-substances table with retention times says considerably more about the synthesis than a single total. A total tells you how much is not the main…
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The report format the maintainers ask for, and why each field is there Replied, post #3 · marked as the solution · Sourcing › Vendor reports · 6 Jul 2026 · 8 likes Comparing your result to somebody else's on a different lot is not a comparison of suppliers. Lot is the unit and it should be in every report.
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Revisiting: PCOS and metabolic overlap: what is and is not studied Replied, post #50 · Clinical › Comorbidities · 5 Jul 2026 · 0 likes A condition that affects nutrition or absorption changes the calculus around a treatment that reduces intake, and that interaction is mostly unstudied. The answer…
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A site rotation scheme that is easy enough to actually follow — a second dataset Replied, post #4 · Practice › Administration · 4 Jul 2026 · 3 likes Appreciated. The plain phrasing does more work here than a longer post would.
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Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #34 · Analytics › Mass spectrometry · 26 Jun 2026 · 6 likes That matches what I have seen, for whatever a single anecdote is worth.
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Coming back to: Why a preprint's supplementary material is often the best part Replied, post #88 · Evidence › Preprints · 25 Jun 2026 · 5 likes Author track record is a weak signal and it is a signal. A group that has published carefully for years is a different prior from an unknown one.
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Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #10 · Analytics › Impurities & related substances · 19 Jun 2026 · 21 likes Thank you for taking the time. That was more work than a reply usually is.
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Injecting into an area that has become firm: why not to Replied, post #76 · Practice › Administration · 15 Jun 2026 · 4 likes If you have to inject at a different time of day than usual, that is a much smaller perturbation than it feels for a weekly compound with a week-long half-life.
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Reading a home test result without over-claiming Replied, post #76 · Analytics › Home & field testing · 12 Jun 2026 · 10 likes Why third-party testing is stronger: a home test run by the person who made the compound is a self-selected result. The test run by a neutral third party removes…