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 I read post #57 twice before replying, because I had assumed the opposite. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write…
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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. Column chemistry and particle size: smaller particles (1.7 μm) give better resolution…
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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 SURPASS-2 compared tirzepatide with semaglutide 1.0 mg, the licensed diabetes dose at that time. It did not compare with semaglutide 2.4 mg, the highest approved dose.…
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What a certificate commits its issuer to Replied, post #13 · Analytics › COA interpretation · 11 Jul 2026 · 24 likes Purity and content are different measurements: purity tells you what proportion of the detected material is the intended species. Content tells you how much of the…
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The report format the maintainers ask for, and why each field is there Replied, post #3 · Sourcing › Vendor reports · 6 Jul 2026 · 1 like Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if the other mass is water, counter-ion, and excipient. Purity and content are…
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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 Comorbidity control: if a comorbidity (high blood pressure, high lipids) is not adequately controlled, the decision about adding compounds in this class depends on the…
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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 This follows post #3 rather than contradicting it. I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The…
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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 Coming back to post #32, because the follow-up matters more than the original answer. Practical note that does not fit anywhere else. Whatever you conclude from this…
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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 Unrefereed work is not worthless. A great deal of it survives review substantially unchanged. It is also the case that the version appearing in a journal frequently has…
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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 the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
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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 Injection discomfort: comes from needle gauge (finer = less discomfort), volume (smaller = less discomfort), temperature (room temperature or warmed is less…
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Reading a home test result without over-claiming Replied, post #76 · Analytics › Home & field testing · 12 Jun 2026 · 10 likes Colorimetric tests: colour intensity correlates with concentration, but the relationship is non-linear at extremes and the correlation depends on the exact conditions…