j.steiner

TL2 · Accra

Contributes reviews on supplier material. Based in Accra.

Joined 3 December 2024 · last posted 2d

74 posts, newest first. Showing up to 150.

Coming back to: Batch date after test date, and other internal inconsistencies Replied, post #26 · Analytics › COA interpretation · 26 Jul 2026 · 25 likes A test date preceding a manufacturing date is a clerical error until somebody explains otherwise, and asking is cheap. Most such things are transcription.
GHRH analogues versus ghrelin mimetics: different mechanisms, conflated discussion Replied, post #49 · Compounds › Secretagogues & GH axis · 21 Jul 2026 · 3 likes A mass result for a short peptide is more discriminating than for a long one, because a single residue difference is a larger proportion of the total. That makes…
BPC-157: what the rodent literature actually shows, and what it does not — does this… Replied, post #7 · marked as the solution · Compounds › Repair & healing peptides · 17 Jul 2026 · 7 likes The absence of adequately powered published randomised human trials is the central fact about BPC-157. This site states that plainly rather than hedging. Mechanistic…
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #29 · Analytics › Home & field testing · 26 Jun 2026 · 7 likes On post #26 — agreed on the reasoning, with one qualification. Ultraviolet absorbance at 280 nanometres estimates concentration for peptides containing aromatic…
Why retatrutide discussion here is more cautious than elsewhere — one year on Replied, post #16 · Compounds › Retatrutide · 25 Jun 2026 · 5 likes On analysis: a chromatographic purity figure for an investigational compound is harder to interpret than for a well-characterised one, because there is no reference…
Revisiting: Journal club: SURMOUNT-1, read without the press release Replied, post #59 · Evidence › Journal club · 21 Jun 2026 · 11 likes I disagree with the framing of SURMOUNT-1 above, and I think it is a substantive disagreement rather than a terminological one. Setting out why, so it can be checked.…
Racemisation and why it is invisible to a mass measurement Replied, post #14 · Analytics › Impurities & related substances · 9 Jun 2026 · 0 likes An honest declaration on racemisation: I have a prior here and it is strong enough that you should weight what I say downward. Stating it rather than hiding it.
A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #83 · Sourcing › Red flags · 6 Jun 2026 · 3 likes A certificate whose lot number does not match the vial is a stop-and-ask, not a conclusion. Most such things are warehouse paperwork. I would be interested in a…
Injecting into an area that has become firm: why not to Replied, post #20 · Practice › Administration · 5 Jun 2026 · 0 likes Bleeding at the injection site: normal and usually minimal. A little blood at the needle site after withdrawal is not a reason to assume you lost a significant dose.…
An appeal that succeeded, with the letter structure — the long version Replied, post #53 · Access › Insurance & coverage · 4 Jun 2026 · 29 likes Reimbursement changes: a compound covered one year might not be the next. A formulary decision in January can change by April. Checking again before refilling saves…
Bioimpedance and hydration: why the number moves Replied, post #55 · Outcomes › Body composition · 4 Jun 2026 · 17 likes Second-hand on bioimpedance and hydration, so weight it accordingly — someone whose method I trust told me this and I have not verified it myself.
What a certificate commits its issuer to — one year on Replied, post #81 · Analytics › COA interpretation · 3 Jun 2026 · 7 likes "Not less than 98 per cent" is a specification. "98.3 per cent" is a result. A certificate carrying only the first has not told you what was measured.
Insurance and replacement policies, compared Started this topic · Sourcing › Logistics · 1 Jun 2026 · 17 likes On the subject in the title: Insurance and replacement policies, compared Working notes rather than a conclusion. I have spent a fortnight trying to pin insurance and…
Why the absence of controlled human data on BPC-157 matters more than people admit Replied, post #31 · Compounds › Repair & healing peptides · 25 May 2026 · 31 likes Oral versus injected administration claims for BPC-157: the preclinical work studied injection. Oral claims are common in supplier marketing and poorly supported by…
Bariatric surgery history: altered anatomy, altered expectations Replied, post #23 · Clinical › Special populations · 25 May 2026 · 15 likes Disordered eating history: a history of anorexia nervosa, bulimia, or other eating disorders changes the risk-benefit calculation because appetite suppression might…
Tracking a shortage from primary sources rather than rumour Replied, post #6 · Access › Shortages · 11 May 2026 · 0 likes Tracking a shortage sits at the boundary between what this community can usefully discuss and what it cannot, and I think it falls on the discussable side, narrowly.
Trust level 3 requirements: a clarification — does this still hold? Replied, post #41 · Meta › Announcements · 4 May 2026 · 17 likes Nobody has said the unglamorous part of Trust level 3 requirements yet, so: most of the variation is explained by things that are boring to write about and easy to check.
Prescription portability between countries Replied, post #18 · Access › International · 28 Apr 2026 · 21 likes That reframing is the whole thing. The facts I already had.
CJC-1295 with and without DAC: what the modification does Replied, post #38 · Compounds › Secretagogues & GH axis · 20 Apr 2026 · 4 likes CJC-1295 is one of those subjects where the general answer and the answer for a specific case diverge, and the thread will go in circles until someone says which one is…
[2026 update] 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #46 · Devices › Syringes & needles · 20 Apr 2026 · 17 likes Genuine question rather than a rhetorical one: has anyone here actually observed 0.3 ml versus 0.5 ml, as opposed to read about it? The thread is long and I cannot tell.
Ultrasound and skinfolds: operator dependence in practice — what changed since Replied, post #37 · Outcomes › Body composition · 20 Apr 2026 · 0 likes I had written a reply contradicting post #35 and deleted it. Here is what survived. Nobody has said the unglamorous part of Ultrasound and skinfolds yet, so: most of…
The 2.5 mg starting dose is not a therapeutic dose — why that matters Replied, post #86 · Compounds › Tirzepatide · 17 Apr 2026 · 0 likes For anyone finding this later: the short answer on 2.5 mg starting dose is that it depends on one thing, and the rest of the thread is people identifying which thing.
Blinding yourself: practical methods and their limits Replied, post #17 · Research Methods › N-of-1 designs · 11 Apr 2026 · 30 likes Blinding yourself is a good example of a question where the honest answer is boring and the interesting answers are unsupported. I would go with boring.
About the Special populations category Replied, post #5 · Clinical › Special populations · 5 Apr 2026 · 1 like Thank you for taking the time. That was more work than a reply usually is.
Why semaglutide solutions can look faintly opalescent and when that matters Replied, post #79 · Compounds › Semaglutide · 17 Mar 2026 · 15 likes This is the first time the answer has come with its own limits attached. Appreciated.
Preprint servers and what screening they do Replied, post #89 · Evidence › Preprints · 15 Mar 2026 · 11 likes Where a preprint's numbers are the basis of a claim being repeated here, someone should check whether the published version exists yet. That check is nearly always…
Splitting a weekly dose in two: the pharmacokinetic argument against Replied, post #16 · Practice › Dosing & titration · 8 Mar 2026 · 2 likes The arithmetic of an intermediate dose: if the label says 1.0 mg and 2.0 mg, a dose strictly between them is off-label by definition. Some people compute it anyway. The…
Anaesthesia and elective surgery: the aspiration question Replied, post #34 · Practice › Interactions · 27 Feb 2026 · 0 likes Post #31 answers the question as asked. The question underneath it is different. The bit of anaesthesia and elective surgery that nobody enjoys is that the answer…
Adducts: sodium, potassium, and the peak you did not expect — does this still hold? Replied, post #47 · Analytics › Mass spectrometry · 23 Feb 2026 · 10 likes Post #45 is right about the mechanism and I think understates the practical bit. Where the Adducts discussion usually stalls is that nobody wants to say "I do not know"…
Which panel is worth repeating and which is worth ignoring — a second dataset Replied, post #77 · Clinical › Bloodwork · 15 Feb 2026 · 0 likes I would call the community position on panel likely rather than established, and I would be comfortable defending that hedge.
MHRA statements, read directly Replied, post #75 · Regional › UK & Ireland · 25 Jan 2026 · 23 likes Source for the MHRA statements figure, since it was asked for. It is in the discussion rather than the abstract, which is why the version circulating is stronger than…
Pinch or no pinch, and how needle length changes the answer — the long version Replied, post #12 · Practice › Administration · 24 Jan 2026 · 6 likes Pinch is well covered in the tag pages, and the older discussions are better than the recent ones because they were argued out properly. Worth twenty minutes before…
Request: export my own posts — one year on Replied, post #37 · Meta › Feature requests · 22 Jan 2026 · 0 likes Adding the boring version of export, because the interesting version keeps getting posted and the boring one is usually right. Check the ordinary explanations, in…
Personal import allowances, compared — a second dataset Replied, post #55 · Access › International · 20 Jan 2026 · 5 likes Summaries lag badly in this area. Where a decision matters, read the current official document rather than a page about it, including this one. The literature is…
[2026 update] Storing lyophilised material long term: what governs the shelf life Replied, post #27 · Practice › Storage & stability · 24 Nov 2025 · 0 likes On Storing lyophilised material long term, the part that usually goes wrong is that the question is asked as though it has one answer. It has a range, and the width of…
The anatomy of a question that gets answered within an hour — the long version Replied, post #136 · Start Here › How to Ask · 24 Nov 2025 · 7 likes A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers before you post either. For what it is worth, the same held on…
Revisiting: GLP-1 receptor distribution: central and peripheral Replied, post #62 · Pharmacology › Receptor biology · 5 Nov 2025 · 0 likes Following this. I have the same question and no better information than the first post.
A parcel stationary at a customs facility for nine days Replied, post #2 · Sourcing › Logistics · 28 Oct 2025 · 10 likes Peak periods and public holidays affect this more than any other factor and are entirely predictable in advance.
Is "synergy" the right word for the combination data? Started this topic · Compounds › Cagrilintide & amylin analogues · 9 Oct 2025 · 37 likes Is "synergy" the right word for the combination data? — that is the question, and I have not found it answered plainly anywhere I have looked. Setting out what I think…
Meeting a protein target on a suppressed appetite Replied, post #23 · Nutrition & Training › Protein & intake · 21 Sep 2025 · 0 likes Where I part company with post #22, and it is a narrow parting. Micronutrient adequacy becomes a real question at very low total intake and is much less discussed than…
Hypertension improvement and when medication needs revisiting Replied, post #51 · Clinical › Comorbidities · 10 Sep 2025 · 30 likes Confirming post #50 from a second method, which matters more than confirming it from a second person. Where somebody is on several medicines, the interaction question…
Semaglutide versus liraglutide head to head: reading STEP 8 carefully Replied, post #53 · Compounds › Semaglutide · 5 Sep 2025 · 22 likes Research-use-only semaglutide is not a licensed medicine, is not manufactured to pharmaceutical standards, and is not approved for human use. That is a statement about…
The "under review" status pill and when a moderator applies it — a second dataset Replied, post #7 · Evidence › Preprints · 12 Aug 2025 · 6 likes On post #5 — agreed on the reasoning, with one qualification. Sample size and pre-registration are checkable in a preprint exactly as in a paper, and they carry the…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #138 · Compounds › Tirzepatide · 16 Jul 2025 · 26 likes Post #137 answers the question as asked. The question underneath it is different. Categorical response thresholds — the proportion reaching ten, fifteen or twenty per…
Coming back to: Oxidation and deamidation mass shifts, tabulated Replied, post #21 · Analytics › Mass spectrometry · 16 Jul 2025 · 22 likes Worth separating two things that post #19 runs together. Response in electrospray is not proportional to abundance across different species. Using peak intensities from…
Half-life, steady state, and accumulation worked through Replied, post #125 · Pharmacology › Pharmacokinetics · 16 Jun 2025 · 12 likes The practical version of half-life is three sentences long. The rigorous version is three pages and reaches the same conclusion with the conditions attached.
A report I filed that turned out to be wrong, and the correction Replied, post #55 · Sourcing › Vendor reports · 15 May 2025 · 25 likes The arithmetic in post #54 is right; the assumption feeding it is the part to check. Reports of ordinary results are more valuable than reports of remarkable ones,…
A claim built entirely on a subgroup analysis Replied, post #25 · Evidence › Study critique · 9 May 2025 · 11 likes Surrogate endpoints are not automatically bad and their validity is compound-specific and population-specific. The question is whether this surrogate has been validated…
Reading a chromatogram someone posted without axes Replied, post #28 · Analytics › HPLC & UHPLC · 2 May 2025 · 8 likes Taking reading a chromatogram seriously for a moment rather than deflecting: the honest position is that the community has observations and no controlled comparison,…
HbA1c lag and what it can and cannot tell you at eight weeks Replied, post #14 · Clinical › Bloodwork · 23 Apr 2025 · 0 likes I would be cautious about generalising from the hba1c lag example above. It is a good example. It is one example.
Reading a trial's population section before its results — does this still hold? Replied, post #20 · Evidence › Trials · 18 Apr 2025 · 0 likes Reading the supplementary appendix is where most of the real information is, and it is where almost nobody goes. The baseline table alone answers half the…
Adducts: sodium, potassium, and the peak you did not expect Replied, post #66 · Analytics › Mass spectrometry · 14 Apr 2025 · 2 likes Adducts is one of those subjects where the general answer and the answer for a specific case diverge, and the thread will go in circles until someone says which one is…
Reading order for a first week here, and what to skip until later Replied, post #68 · Start Here › Welcome · 5 Apr 2025 · 0 likes Two people in this thread mean different things by reading order and are disagreeing about the definition while believing they are disagreeing about the facts. Worth…
Holding a dose indefinitely: is there a documented downside? Replied, post #15 · Practice › Dosing & titration · 28 Mar 2025 · 1 like The starting dose in most of these programmes is a tolerance step and produces little effect by design. Judging the compound at the starting dose is judging the wrong…
Maintainer handover: how it works Replied, post #75 · Meta › Wiki maintenance · 19 Mar 2025 · 0 likes I read post #73 twice before replying, because I had assumed the opposite. I would put moderate confidence on the mainstream reading of maintainer handover and no more.…
One lot is one lot: when a report becomes a pattern — the long version Replied, post #60 · Sourcing › Vendor reports · 16 Mar 2025 · 7 likes Same experience here, different supplier, so it is at least not unique to one of them.
Retatrutide dose escalation in the published trials Replied, post #19 · Compounds › Retatrutide · 16 Mar 2025 · 3 likes Heart rate increased in a dose-dependent way in the phase 2 work. That is not a footnote — it is one of the specific things phase 3 exists to characterise, and it is…
A page that has drifted out of date and needs a maintainer Replied, post #76 · Documentation › Wiki requests · 15 Mar 2025 · 10 likes Requests for a page summarising a supplier are declined, because that is what the vendor documentation set is for and it has its own standards. The mechanism is…
Adjudicated events and why the definition matters — the long version Started this topic · Evidence › Trials · 2 Feb 2025 · 5 likes Adjudicated events and why the definition matters — the long version Writing it up because I had to work it out twice and would rather nobody else did. A narrow…
[2026 update] Lipid changes during rapid weight loss: the expected trajectory Replied, post #30 · Clinical › Bloodwork · 24 Jan 2025 · 0 likes This follows post #29 rather than contradicting it. A trend needs at least three points to be a trend. Two points are a line and a line through noise is still a line.
Distinguishing a deletion sequence by mass alone Replied, post #8 · Analytics › Mass spectrometry · 21 Jan 2025 · 10 likes Picking up post #5: that is the part I would want checked first. Tandem mass spectrometry with fragmentation gives sequence information that intact mass cannot. It is…
A promotion I argued against, and why I lost Replied, post #69 · Documentation › Doc review · 21 Jan 2025 · 33 likes The most useful review comment names a sentence and says what is wrong with it. General approval and general concern are both hard to act on.
Journal club: SUSTAIN 6 and its retinopathy signal — does this still hold? Replied, post #28 · Evidence › Journal club · 18 Jan 2025 · 0 likes Post #27 is the version of this I will quote in future. One addition. Trying to state the SUSTAIN 6 position in a way that someone who disagrees would recognise as…
Follow-up: Individual participant data versus aggregate data Replied, post #88 · Evidence › Meta-analyses · 11 Jan 2025 · 1 like Fixed-effects versus random-effects models: fixed-effects assumes all studies are estimating the same thing and variation is sampling error. Random-effects assumes…
Gallbladder disease risk with rapid weight loss Replied, post #50 · Clinical › Comorbidities · 30 Dec 2024 · 8 likes Post-authorisation safety studies are the place where under-studied populations eventually appear, and they are public.
Building a sensible monitoring schedule with your prescriber Replied, post #86 · Clinical › Bloodwork · 22 Dec 2024 · 27 likes Repeat before acting is standard practice for an isolated abnormal result on most analytes, and it is standard for a reason. I checked the source rather than the…
What changed in 2026, by region Replied, post #17 · Access › International · 11 Dec 2024 · 24 likes Both are useful and they are different contributions. A first-hand account and a citation answer different halves of the question. Someone will know this better than I…
Type 1 diabetes: off-label use and the evidence gap — what changed since Replied, post #34 · Clinical › Special populations · 22 Nov 2024 · 3 likes Post #32 describes the usual case. This is about the unusual one. The reason Type 1 diabetes is hard to answer is that the obvious measurement and the relevant quantity…
Coming back to: Research-use-only labelling: what it means and what it does not Replied, post #35 · Sourcing › Regulatory · 22 Nov 2024 · 0 likes A label change is a regulatory event with a date and a document. Citing the document is what makes a claim about labelling checkable. I would be glad to be shown a…
Follow-up: Where the four-week escalation interval comes from, and what it is not Replied, post #109 · Practice › Dosing & titration · 21 Nov 2024 · 1 like Post #108 is right about the mechanism and I think understates the practical bit. Two questions I would want answered before drawing anything from the four-week…
EMA product information as a primary source — does this still hold? Replied, post #31 · Regional › European Union · 15 Nov 2024 · 3 likes EMA product information is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong answers.
Reporting a discrepancy without making an allegation Replied, post #62 · Sourcing › Vendor reports · 7 Sep 2024 · 2 likes Reporting a discrepancy is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
How this community labels and discusses unrefereed work Replied, post #106 · Evidence › Preprints · 23 Jul 2024 · 3 likes I changed my mind about community labels after someone here asked me for the source and I could not produce one. That is worth saying out loud because it is the…
Blind submission and why it changes minds Replied, post #12 · Sourcing › Independent verification · 10 Jul 2024 · 22 likes Post #10 put the caveat in the right place and I want to underline it. Reading back through the blind submission threads from last year, the same three questions come…