b.wikstrom

TL2 · Porto

Contributes reviews on supplier material. Based in Porto.

Joined 29 July 2025 · last posted 8d

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Here for the analytics and not much else Replied, post #60 · Lounge › Introductions · 20 Jul 2026 · 0 likes Nice to meet you. Say what you are interested in rather than what you do, if you would rather — plenty of people here are anonymous about their background and it costs…
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #95 · Analytics › Method validation · 18 Jul 2026 · 0 likes Practical note on Specificity: write down what you expect before you look. The number of times I have found what I went looking for is higher than chance would allow.
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #81 · Sourcing › Independent verification · 11 Jul 2026 · 13 likes Building on post #78 rather than restating it. The record shows what was measured. Everything beyond that is inference and this site tries to keep the line visible.…
Alcohol: what is documented and what is folklore Replied, post #79 · Practice › Interactions · 27 Jun 2026 · 1 like Anything that also slows gut motility compounds the same mechanism. That is a plausibility argument rather than a documented interaction, and it should be labelled as…
About the Welcome category Replied, post #4 · Start Here › Welcome · 25 Jun 2026 · 1 like Suggestion for the wiki post above: it would be worth linking the two or three most-referenced topics in this category directly, since new members reliably ask for…
Batch numbers that do not match the vial label Replied, post #33 · Sourcing › Red flags · 23 Jun 2026 · 1 like Adding a null result on batch numbers. I looked, carefully, and found nothing, and null results deserve posting precisely because they never are.
Run-in periods and the population they select Replied, post #135 · Evidence › Trials · 12 Jun 2026 · 14 likes Population narrowness: most trials in this class enrolled fairly specific groups. Baseline body mass index ranges, exclusion of renal disease, exclusion of certain…
What I would want from a home test that does not exist yet — what changed since Replied, post #47 · Analytics › Home & field testing · 8 Jun 2026 · 0 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…
Comparing prices across jurisdictions without misleading yourself Replied, post #51 · Access › Pricing · 7 Jun 2026 · 0 likes Narrowing post #48, because the general version has more than one answer. Worth stating the null on comparing prices across jurisdictions before we explain it: the…
Spreadsheets: an appreciation — what changed since Replied, post #63 · Lounge › Off topic · 6 Jun 2026 · 4 likes Second this, and I would have said it less carefully.
Second pass at: A pooled estimate that changed when one trial was added Replied, post #9 · Evidence › Meta-analyses · 20 May 2026 · 10 likes Double extraction with disagreement resolution is standard and is worth checking for, because single extraction errors are common and non-random. One of those cases…
Second pass at: Metformin co-administration and additive GI effects Replied, post #107 · Practice › Interactions · 18 May 2026 · 5 likes Everything in post #103 holds. The case it does not cover is the one I have. SGLT2 inhibitors: frequently co-administered and relevant to renal and cardiovascular…