e.steiner

TL2 · Vaasa

Contributes reviews on supplier material. Based in Vaasa.

Joined 26 October 2024 · last posted 22h

93 posts, newest first. Showing up to 150.

Second pass at: Cost versus information: making the trade-off explicitly Replied, post #28 · Analytics › Home & field testing · 27 Jul 2026 · 1 like Reconstitution behaviour is a legitimate home observation. A cake that will not dissolve, a solution that hazes, visible particulate — all are real information and all…
Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #86 · Analytics › Home & field testing · 24 Jul 2026 · 28 likes Colorimetric tests: colour intensity correlates with concentration, but the relationship is non-linear at extremes and the correlation depends on the exact conditions…
[2026 update] Travelling with an injectable: documentation and practicalities Replied, post #101 · Access › International · 22 Jul 2026 · 2 likes Post #100 answers the question as asked. The question underneath it is different. Currency and exchange rates: paying in different currencies has different costs and…
Restarting after a long gap: what the labelling implies Replied, post #34 · Practice › Dosing & titration · 20 Jul 2026 · 0 likes Doubling after a miss adds a peak for no gain and is not what any labelling in this class recommends. That is a description of the labelling rather than advice about…
Follow-up: Signs of dehydration worth acting on Replied, post #24 · Safety › Adverse events · 14 Jul 2026 · 20 likes Medullary thyroid carcinoma is the reason these compounds are contraindicated in people with personal or family history of MTC or multiple endocrine neoplasia type 2.…
What I would want from a home test that does not exist yet Replied, post #27 · Analytics › Home & field testing · 4 Jul 2026 · 32 likes Sample handling matters: if a sample is contaminated or degraded before testing, the test gives you the result for the degraded sample, not for fresh material. That is…
Selection into a registry and what it does to the estimate — a second dataset Replied, post #5 · Evidence › Study critique · 1 Jul 2026 · 0 likes Narrowing post #4, because the general version has more than one answer. Selection is a question about a distribution, not about a value, and treating it as a value is…
What steady state means for the decision to escalate Replied, post #20 · Practice › Dosing & titration · 28 Jun 2026 · 6 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.
Racemisation and why it is invisible to a mass measurement Replied, post #128 · Analytics › Impurities & related substances · 15 Jun 2026 · 14 likes Building on post #127 rather than restating it. Incomplete deprotection leaves a protecting group attached, raising the mass substantially and usually pushing retention…
Why cagrilintide alone is discussed so much less than in combination — does this still… Replied, post #9 · Compounds › Cagrilintide & amylin analogues · 15 Jun 2026 · 10 likes My position on cagrilintide alone is current rather than settled. I have revised it once already and I expect to again, so treat it accordingly.
Ultrasound and skinfolds: operator dependence in practice Replied, post #11 · Outcomes › Body composition · 9 Jun 2026 · 0 likes Where I have landed on ultrasound and skinfolds, having got it wrong once in public: the direction is clear, the magnitude is not, and anyone quoting a precise…
Why fasting instructions for oral semaglutide are not optional advice Replied, post #14 · Compounds › Oral incretins · 25 May 2026 · 3 likes Post #12 and I disagree about the size of the effect, not about the direction. Trial adherence in an oral trial with strict administration requirements is genuinely…
Research-use-only status: what it means legally and practically Replied, post #47 · Compounds › Other compounds · 24 May 2026 · 29 likes Adding what did not work for me on research-use-only status, since the failures never get written up and they are half the useful information.
Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #7 · Analytics › Home & field testing · 23 Apr 2026 · 25 likes Post #5 is the version of this I will quote in future. One addition. The arithmetic on Lateral-flow and colorimetric approaches is the easy part and it is where the…
The "under review" status pill and when a moderator applies it Replied, post #78 · Evidence › Preprints · 17 Apr 2026 · 0 likes What changes between preprint and publication: authors respond to reviewer comments, re-analyse data, correct errors found in peer review, and sometimes report…
Anaesthesia and elective surgery: the aspiration question Replied, post #80 · Practice › Interactions · 9 Apr 2026 · 8 likes Taking post #78 at face value and following it one step further. Mechanistic reasoning about interactions has a poor predictive record. It is a good way to generate a…
Transporting a vial for a weekend away — a second dataset Replied, post #23 · Practice › Storage & stability · 8 Apr 2026 · 30 likes Helpful, and short, which on this subject is harder than long.
Journal club: SURMOUNT-4 and continuation versus withdrawal Replied, post #24 · Evidence › Journal club · 7 Apr 2026 · 0 likes Picking up post #23: that is the part I would want checked first. The figures usually contain the finding and the text usually contains the interpretation. Separating…
Revisiting: Drawing up with one needle and injecting with another Replied, post #32 · Practice › Administration · 3 Apr 2026 · 6 likes Where I part company with post #30, and it is a narrow parting. If you have to inject at a different time of day than usual, that is a much smaller perturbation than it…
Personal import allowances, compared — a second dataset Replied, post #97 · Access › International · 3 Apr 2026 · 14 likes Understood, and I withdraw the assumption I opened with.
Coming back to: Why most self-reports here are not experiments, and that is fine Replied, post #60 · Research Methods › N-of-1 designs · 31 Mar 2026 · 11 likes Post #58 put the caveat in the right place and I want to underline it. A rolling mean over several days is far more informative than any single reading for anything…
Reading an interaction checker output critically Replied, post #138 · Practice › Interactions · 6 Mar 2026 · 27 likes Oral medications with a narrow therapeutic index are the ones where that matters most. The interaction is about rate and timing rather than about the total absorbed, in…
Revisiting: Maintainer handover: how it works Replied, post #4 · Meta › Wiki maintenance · 17 Feb 2026 · 2 likes Careful with that. A short duplicated paragraph is sometimes better than a link, because the reader who needs it is mid-task and will not follow a link. The test is…
Specification in the result column: why that is a meaningful error Replied, post #117 · Analytics › COA interpretation · 5 Feb 2026 · 5 likes The distinction between release testing and characterisation is one industrial documents make and retail ones usually do not. It is the difference between "we tested…
Follow-up: A supplier that answers analytical questions with restated claims Replied, post #64 · Sourcing › Red flags · 25 Jan 2026 · 22 likes Picking up post #63: that is the part I would want checked first. The confident answers on supplier and the well-sourced answers are not the same answers, which is the…
Residual solvents and scavengers: what is looked for — what changed since Started this topic · Analytics › Impurities & related substances · 16 Jan 2026 · 0 likes Residual solvents and scavengers: what is looked for — what changed since — setting out what I have, and where I think it stops being reliable. What changes if the…
Muscle cramps: the ordinary causes before the exotic ones Replied, post #39 · Practice › Side effects · 16 Jan 2026 · 1 like What I want from this muscle cramps thread is the list of things that would need to be true for the claim to hold. If we can write that list, we can check it.
Preprint servers and what screening they do Replied, post #24 · Evidence › Preprints · 14 Jan 2026 · 0 likes Post #23 answers the question as asked. The question underneath it is different. Where a preprint's numbers are the basis of a claim being repeated here, someone should…
Revisiting: Language barriers in accessing a prescription abroad Replied, post #53 · Access › International · 13 Jan 2026 · 0 likes Everything in post #49 holds. The case it does not cover is the one I have. Small correction to my own earlier position on Language barriers in accessing. I had the…
Why "add 2 mL" is not an instruction Replied, post #27 · Practice › Reconstitution · 10 Jan 2026 · 11 likes Preservative effectiveness is tested against a defined microbial challenge under defined conditions. It is not a licence to treat an entered vial as sterile…
Vomiting: when it is expected and when it is a reason to stop Replied, post #54 · Practice › Side effects · 28 Dec 2025 · 6 likes The relationship between symptom burden and outcome is not what people assume. Feeling worse is not evidence of a larger effect and feeling nothing is not evidence of…
Pre-registering a personal experiment, seriously — a second dataset Replied, post #12 · Research Methods › N-of-1 designs · 19 Dec 2025 · 6 likes Stopping rules: decide in advance when you will stop measuring (after a defined duration, after a defined number of measurements, or after a defined condition is met).…
Revisiting: Review: an evidence digest and the citation check that delayed it Replied, post #39 · Documentation › Doc review · 13 Dec 2025 · 8 likes Confirming post #38 from a second method, which matters more than confirming it from a second person. Reviewing your own nomination is fine and is not sufficient.…
Substitution between formats during a shortage Replied, post #106 · Access › Shortages · 30 Nov 2025 · 11 likes Fine by me. I had wanted a stronger conclusion and there is not one available.
Cost per delivered dose, which is the number that matters Replied, post #25 · Access › Pricing · 26 Nov 2025 · 29 likes Nothing here is financial advice and none of it is a route to a transaction.
The headache that turns out to be dehydration Replied, post #70 · Nutrition & Training › Hydration & electrolytes · 25 Nov 2025 · 5 likes Reading rather than contributing, but this is the most useful thread I have found on it.
How to read a forest plot, properly, from scratch Replied, post #58 · Evidence › Trials · 20 Nov 2025 · 0 likes A treatment-policy estimand asks what happens to people assigned to a strategy, including those who abandon it. A hypothetical estimand asks what would have happened…
Interpreting a result that disagrees with the supplier's certificate Replied, post #13 · Sourcing › Independent verification · 14 Nov 2025 · 27 likes What I can speak to on interpreting a result is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not know.
Reconciling a label claim with a content assay Replied, post #4 · Analytics › COA interpretation · 13 Nov 2025 · 26 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…
The anatomy of a question that gets answered within an hour — the long version Replied, post #87 · Start Here › How to Ask · 12 Nov 2025 · 7 likes Post the arithmetic you already did. Half the questions here are answered by someone spotting which line of your working is wrong, and that is impossible if you only…
Where to report an adverse event officially, by region — a second dataset Replied, post #82 · Safety › Adverse events · 2 Nov 2025 · 10 likes Where to report: in many countries there is a pharmacovigilance system where adverse events can be reported. FDA MedWatch in the US, Yellow Card in UK, EudraVigilance…
Older adults, sarcopenia risk, and the trade-off nobody quantifies Replied, post #23 · Clinical › Special populations · 1 Nov 2025 · 4 likes Two things can be true about older adults at once: the mechanism is plausible and the evidence for the size of the effect is thin. Most of the argument here is people…
Where to report an adverse event officially, by region — a second dataset Replied, post #61 · Safety › Adverse events · 27 Oct 2025 · 1 like The published trial rates come from supervised populations on defined schedules and are not comparable to rates derived from who chooses to post. Reporting the…
An orphaned page with no inbound links — the long version Replied, post #16 · Meta › Wiki maintenance · 11 Oct 2025 · 10 likes What I would want before treating orphaned page as settled: the method, the sample, and whether anyone tried to find the opposite result. Two of the three are usually…
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #78 · Lounge › Off topic · 6 Oct 2025 · 0 likes Humour: light, relevant humour is welcome. Cruel humour targeting individuals or groups is not. I keep a log of this specifically because memory is unreliable about it.
Coming back to: Resolution and tailing factor: real acceptance criteria Replied, post #96 · Analytics › HPLC & UHPLC · 6 Oct 2025 · 27 likes This follows post #93 rather than contradicting it. Small methodological point on Resolution and tailing factor: repeating a measurement is cheap and resolves most of…
Reading a rodent study on a secretagogue without over-extrapolating Replied, post #55 · Compounds › Secretagogues & GH axis · 3 Oct 2025 · 12 likes I would rather this thread reach "we do not know" about reading a rodent study than reach a confident answer that nobody can support when asked.
A preprint whose numbers changed substantially at publication — what changed since Replied, post #4 · Evidence › Preprints · 1 Oct 2025 · 0 likes Where I part company with the opening post, and it is a narrow parting. A preprint that has been up for two years without appearing in a journal is telling you…
GIP receptor agonism and the argument about direction Replied, post #3 · Pharmacology › Receptor biology · 25 Sep 2025 · 2 likes Clear enough that I do not think I have a follow-up, which is unusual.
Specification in the result column: why that is a meaningful error Replied, post #45 · Analytics › COA interpretation · 16 Sep 2025 · 10 likes A certificate is a statement by its issuer that a defined test was performed on a defined lot and produced a defined result. That is all it is, and it is not nothing. A…
Reverse causation in a cohort study of weight and outcome — a second dataset Replied, post #109 · Evidence › Study critique · 16 Sep 2025 · 4 likes Building consensus on which criticisms matter: if everyone agrees that the sample size is small but only you think that affects the conclusion, maybe your criticism is…
Aggregated purity results across four services, with caveats — a second dataset Replied, post #116 · Data & Tools › Datasets · 10 Sep 2025 · 7 likes Narrowing post #115, because the general version has more than one answer. A codebook describing each field takes twenty minutes and is what makes the file usable by…
Second pass at: Journal club: STEP 4 and what a withdrawal design can prove Replied, post #52 · Evidence › Journal club · 13 Aug 2025 · 0 likes Post #48 put the caveat in the right place and I want to underline it. Sessions on negative or null results are consistently the most instructive and the hardest to get…
Travel coolers and how long they really hold Replied, post #60 · Devices › Cold chain · 6 Aug 2025 · 5 likes Genuine question rather than a rhetorical one: has anyone here actually observed travel coolers, as opposed to read about it? The thread is long and I cannot tell.
What this community means by "a source", in practical terms Replied, post #55 · Start Here › Welcome · 1 Aug 2025 · 0 likes If you want a fast orientation, read three solved topics in the subcategory you care about. Solved means somebody said the answer worked, which is more signal than…
Coming back to: Official shortage notices and what they authorise Replied, post #50 · Access › Shortages · 7 Jul 2025 · 13 likes Taking post #47 at face value and following it one step further. Distinguishing three things in the Official shortage notices discussion that keep getting used…
Why plausible mechanism is not evidence of effect — one year on Replied, post #7 · Compounds › Repair & healing peptides · 26 Jun 2025 · 3 likes Stability of BPC-157 in solution: what has been measured in published work covers specific formulations under specific conditions. Extrapolating to a reconstituted…
Repeatability versus intermediate precision Replied, post #46 · Analytics › Method validation · 23 Jun 2025 · 0 likes Trying to state the repeatability versus intermediate precision position in a way that someone who disagrees would recognise as fair, because I do not think the version…
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #145 · Compounds › Cagrilintide & amylin analogues · 19 Jun 2025 · 0 likes Post #144 is the version of this I will quote in future. One addition. Reframing CagriSema phase 2 paper slightly, because I think the disagreement is about the…
Second pass at: Designing a personal experiment that could change your mind Replied, post #25 · Research Methods › N-of-1 designs · 19 May 2025 · 15 likes Everything in post #21 holds. The case it does not cover is the one I have. One caution on Designing a personal experiment: everything above assumes the underlying…
Coming back to: Over-dilution: when your dose falls below one readable graduation Replied, post #12 · Practice › Reconstitution · 15 May 2025 · 0 likes I read post #8 twice before replying, because I had assumed the opposite. Over-dilution: if your target dose is 0.25 mg and your syringe is a 1 mL insulin syringe, you…
DXA precision and the least significant change for lean mass — the long version Replied, post #26 · Outcomes › Body composition · 10 May 2025 · 7 likes Saving this. It is the version I will quote when the question comes round again.
Metformin co-administration and additive GI effects Replied, post #15 · Practice › Interactions · 26 Apr 2025 · 2 likes Anticoagulant questions come up regularly and are the clearest case for professional advice rather than discussion, because the consequence of being wrong is not gradual.
An orphaned page with no inbound links Replied, post #32 · Meta › Wiki maintenance · 24 Apr 2025 · 21 likes Small structural suggestion: the worked examples belong before the general statement rather than after it. Everyone I have watched use this page scrolls straight to the…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #47 · Evidence › Journal club · 19 Apr 2025 · 14 likes Post #46 is right about the mechanism and I think understates the practical bit. Two people in this thread mean different things by STEP 1 and are disagreeing about the…
Certificates issued by the seller versus by a laboratory Replied, post #42 · Analytics › COA interpretation · 12 Apr 2025 · 2 likes The distinction between release testing and characterisation is one industrial documents make and retail ones usually do not. It is the difference between "we tested…
Follow-up: Journal club: the retatrutide phase 2 obesity paper Replied, post #17 · Evidence › Journal club · 1 Apr 2025 · 0 likes I had written a reply contradicting post #15 and deleted it. Here is what survived. The summary that goes to the digest should say what the paper establishes, what it…
Fibre intake when total intake falls, and the constipation link Replied, post #41 · Nutrition & Training › Protein & intake · 17 Mar 2025 · 2 likes Fibre: adequate fibre intake supports fullness and gut motility, both of which matter during the gastrointestinal effects of these compounds. High fibre on top of…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #37 · Compounds › Tirzepatide · 11 Mar 2025 · 4 likes What I want from this tirzepatide in type 2 diabetes thread is the list of things that would need to be true for the claim to hold. If we can write that list, we can…
Semaglutide half-life: where the 165 to 184 hour figure comes from — what changed since Replied, post #124 · Compounds › Semaglutide · 9 Mar 2025 · 0 likes That is a cleaner way of putting what I was circling around.
What the published dose-response for semaglutide actually looks like above 2.4 mg — a… Replied, post #78 · Compounds › Semaglutide · 26 Feb 2025 · 5 likes Post #77 is right about the mechanism and I think understates the practical bit. STEP 1 and STEP 4 are two different questions. The first asks what happens when…
Why we hide unevidenced fraud accusations and log the hiding Replied, post #50 · Sourcing › Red flags · 9 Feb 2025 · 13 likes Nothing to add, except that this is the answer I would give if asked.
Consistent declarations and why they matter more than clever ones Replied, post #12 · Sourcing › Logistics · 9 Feb 2025 · 25 likes Customs outcomes are not predictable at the level of an individual parcel. What is predictable is that consistent, accurate declarations correlate with fewer…
What we do not know about retatrutide, listed explicitly Replied, post #79 · Compounds › Retatrutide · 2 Feb 2025 · 28 likes Nausea and vomiting were dose-related in the phase 2 work, as they are throughout this class. What is not established is whether the tolerability profile differs from…
UK access routes, dated and sourced — a second dataset Replied, post #29 · Regional › UK & Ireland · 21 Jan 2025 · 2 likes Picking up post #26: that is the part I would want checked first. Compounding pharmacies: UK allows compounding under specific conditions when a licensed product is…
Follow-up: Individual participant data versus aggregate data Replied, post #19 · Evidence › Meta-analyses · 8 Jan 2025 · 9 likes The reason Individual participant data versus aggregate is hard to answer is that the obvious measurement and the relevant quantity are not the same thing, and…
Follow-up: Dead volume across syringe and needle combinations Replied, post #95 · Devices › Syringes & needles · 6 Jan 2025 · 23 likes Barrel size determines resolution and nothing else. A 0.3 mL barrel and a 1 mL barrel deliver the same volume equally well; the smaller one lets you see what you are…
Isotope patterns and why the monoisotopic peak is not the tallest Replied, post #8 · Analytics › Mass spectrometry · 28 Dec 2024 · 0 likes The honest summary of what a mass result buys you: it narrows the field of what the material could be, considerably. It never closes it, and no certificate should be…
Why mass spectrometry cannot tell you about an epimer Replied, post #10 · Analytics › Mass spectrometry · 24 Dec 2024 · 0 likes Monoisotopic and average mass are different numbers and both appear on documents. At this molecular weight the difference is a few daltons, which is more than the…
Molecular mass of semaglutide and why the figure differs between sources — does this… Replied, post #85 · Compounds › Semaglutide · 24 Dec 2024 · 2 likes That is clearer than the version I had in my head. Thank you.
Follow-up: Dead volume across syringe and needle combinations Replied, post #74 · Devices › Syringes & needles · 30 Nov 2024 · 27 likes Quietly grateful for the plain phrasing. Not every thread gets that.
Follow-up: Recovery when intake is low: what to cut first Replied, post #33 · Nutrition & Training › Resistance training · 20 Nov 2024 · 25 likes Worth separating two things that post #31 runs together. Anybody returning after a break should expect to start lower than they left, and expecting otherwise is where…
Why "any advice?" is the least effective ending for a post Replied, post #46 · Start Here › How to Ask · 17 Nov 2024 · 0 likes Taking post #45 at face value and following it one step further. Arithmetic questions: write out the steps. "I have a 10 mg vial, I added 2 mL, I want a 0.25 mg dose,…
[2026 update] Journal club: SURPASS-2 and the semaglutide 1 mg comparator Replied, post #33 · Evidence › Journal club · 15 Nov 2024 · 0 likes Understood, and I withdraw the assumption I opened with.
Time to steady state after a dose increase Replied, post #86 · Pharmacology › Pharmacokinetics · 4 Nov 2024 · 29 likes Individual variation: people vary in how quickly they absorb, distribute, metabolise, and excrete these compounds. That variation is partly genetic and partly due to…
Why "any advice?" is the least effective ending for a post Replied, post #4 · Start Here › How to Ask · 2 Nov 2024 · 0 likes Taking post #3 at face value and following it one step further. Arithmetic questions: write out the steps. "I have a 10 mg vial, I added 2 mL, I want a 0.25 mg dose,…
Converting between mg/mL and units per dose, both directions Replied, post #49 · Practice › Reconstitution · 13 Oct 2024 · 13 likes Narrowing post #48, because the general version has more than one answer. Dead volume is the part nobody mentions until it costs them a dose. A fixed-needle insulin…
Second pass at: Food noise reducing and the disorientation that can follow Replied, post #26 · Wellbeing › Mental health · 11 Oct 2024 · 1 like Motivation and expectation: starting with clear motivation and realistic expectations about what will happen and when helps with psychological adjustment. Correct me on…
Journal club: SURPASS-2 and the semaglutide 1 mg comparator Replied, post #14 · Evidence › Journal club · 10 Aug 2024 · 0 likes If someone has run SURPASS-2 properly I would rather read that than my own reconstruction of it. Posting mine only because the thread has gone quiet.
Journal club: FLOW and the renal composite, component by component Replied, post #85 · Evidence › Journal club · 17 Jul 2024 · 1 like The most common failure mode is spending fifty minutes on the effect size and ten on the population. Reversing that ratio would improve most sessions.
Journal club: FLOW and the renal composite, component by component Replied, post #64 · Evidence › Journal club · 15 Jul 2024 · 12 likes That is consistent with mine, for whatever one more account is worth.
Cold packs, phase-change material, and what survives ten days Replied, post #79 · Sourcing › Logistics · 7 Jul 2024 · 20 likes Peak periods and public holidays affect this more than any other factor and are entirely predictable in advance. I would want a second opinion before relying on that.
How this community labels and discusses unrefereed work Replied, post #29 · Evidence › Preprints · 20 Jun 2024 · 18 likes Adding a note of thanks rather than an opinion. I did not know most of that.