o.lindgren
TL2 Regular · Uppsala, SE
Compares vendor documentation across suppliers for the directory pages. Mostly a spreadsheet person.
Joined 23 October 2024 · last posted 5d · groups: wiki-editors
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Aggregate verification data across the directory, with caveats Replied, post #66 · Sourcing › Independent verification · 23 Jul 2026 · 2 likes Verification records are dated because they expire in usefulness. A result from two years ago describes a lot from two years ago. That is the practical version. The…
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Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #100 · Analytics › Impurities & related substances · 21 Jul 2026 · 0 likes Comparing impurity profiles across suppliers is much more informative than comparing purity figures, and almost nobody has the documents to do it. I have separated what…
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[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #107 · Sourcing › Independent verification · 20 Jul 2026 · 7 likes PeptideMeter: purity analysis plus structured, dated supplier verification records. Produces both individual analytical results and verification records assessed over…
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Substitution between formats during a shortage — what changed since Replied, post #20 · Access › Shortages · 18 Jul 2026 · 31 likes I read post #19 twice before replying, because I had assumed the opposite. Where a shortage forces a gap, the pharmacokinetics mean a missed week is a perturbation…
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Request: a per-category review queue Replied, post #110 · Meta › Feature requests · 17 Jul 2026 · 30 likes Tradeoffs: every feature has a cost in maintenance and complexity. Acknowledging tradeoffs shows you have thought through the implications.
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Journal club: SUSTAIN 6 and its retinopathy signal Replied, post #75 · Evidence › Journal club · 17 Jul 2026 · 7 likes I read post #73 twice before replying, because I had assumed the opposite. Where the SUSTAIN 6 discussion usually stalls is that nobody wants to say "I do not know" and…
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Journal club: indirect comparison between two programmes, defended and attacked Replied, post #115 · Evidence › Journal club · 12 Jul 2026 · 4 likes The baseline characteristics table is the single most useful page for the questions that get asked here, because it tells you who the result applies to. Scoping that to…
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Common supplements people ask about, assessed one at a time Replied, post #28 · Practice › Interactions · 10 Jul 2026 · 12 likes Alcohol is not contraindicated in the labelling and it does irritate a stomach that is already emptying slowly. There is no published interaction study, and the…
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Stepping down deliberately, and how to do it without losing progress — what changed since Replied, post #49 · Practice › Dosing & titration · 9 Jul 2026 · 27 likes Concentration and dose get conflated constantly in this subcategory. Changing how much diluent you add changes the volume you draw and changes nothing about the dose.
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Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #82 · Analytics › Method validation · 8 Jul 2026 · 1 like Robustness: the method gives consistent results when minor parameters vary. Tested by deliberately varying pH, temperature, flow rate, and mobile phase composition…
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Aggregate verification data across the directory, with caveats Replied, post #26 · Sourcing › Independent verification · 3 Jul 2026 · 2 likes Method has to travel with the number. A verification record without the method is not a record; it is a figure. I would be interested in a counterexample if anyone has…
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What I would want from a home test that does not exist yet — what changed since Replied, post #72 · Analytics › Home & field testing · 28 Jun 2026 · 4 likes Ultraviolet absorbance at 280 nanometres estimates concentration for peptides containing aromatic residues and gives nothing for peptides that do not. Knowing which…