s.vanhecke

TL2 · Osijek

Contributes reviews on supplier material. Based in Osijek.

Joined 27 May 2025 · last posted 3d

91 posts, newest first. Showing up to 150.

Journal club: orforglipron phase 2 and the non-peptide question Replied, post #131 · Evidence › Journal club · 25 Jul 2026 · 8 likes Post #128 put the caveat in the right place and I want to underline it. People arriving without having read it should be welcome and should say so, because a question…
Type 2 diabetes and the largest part of the evidence base — does this still hold? Replied, post #22 · Clinical › Comorbidities · 22 Jul 2026 · 0 likes Confirming post #21 from a second method, which matters more than confirming it from a second person. I have no financial interest in anything named in this thread and…
Reading a home test result without over-claiming Replied, post #130 · Analytics › Home & field testing · 22 Jul 2026 · 0 likes Photographs of test results posted here are worth including with the lighting and the timing stated, because both change the apparent result of a colorimetric method…
What to bring: records that a clinician can actually use — a second dataset Replied, post #59 · Clinical › Prescriber conversations · 21 Jul 2026 · 2 likes Building on post #58 rather than restating it. Prescription logistics: confirm whether it will be filled locally, requires mail order, or will be prescribed off-label…
Shakes versus food: a pragmatic assessment Replied, post #25 · Nutrition & Training › Protein & intake · 19 Jul 2026 · 2 likes Post #21 and I disagree about the size of the effect, not about the direction. Where somebody reports losing strength, intake and training stimulus are the first two…
Tracking a shortage from primary sources rather than rumour Replied, post #109 · Access › Shortages · 18 Jul 2026 · 0 likes Regional differences during a shortage are large, and a supply position in one country says nothing about another.
Transit times by route, from a logged dataset Replied, post #13 · Sourcing › Logistics · 16 Jul 2026 · 11 likes Following this. I have the same question and no better information than the first post.
What a certificate commits its issuer to — one year on Replied, post #101 · Analytics › COA interpretation · 3 Jul 2026 · 29 likes A chromatogram supplied as a small image is legible for peak shape and not for baseline detail. That is enough to sanity-check an integration and not enough to…
Follow-up: Reading an interaction checker output critically Replied, post #28 · Practice › Interactions · 2 Jul 2026 · 0 likes Post #27 is the version of this I will quote in future. One addition. SGLT2 inhibitors: frequently co-administered and relevant to renal and cardiovascular discussion,…
An appeal that succeeded, with the letter structure Replied, post #8 · Access › Insurance & coverage · 11 Jun 2026 · 5 likes Good question, well framed, and I would like to see it answered properly.
Micronutrient adequacy at low total intake Replied, post #60 · Nutrition & Training › Protein & intake · 11 Jun 2026 · 9 likes The useful distinction on micronutrient adequacy is between what was measured and what was inferred from it. Both end up in the same sentence and only one of them has…
Revisiting: What pooling buys you and what it destroys Replied, post #40 · Evidence › Meta-analyses · 1 Jun 2026 · 0 likes Second this, and I would have said it less carefully.
Prescription portability between countries Replied, post #45 · Access › International · 27 May 2026 · 25 likes Agreed, and I will stop repeating the version of this I had been repeating.
Pinch or no pinch, and how needle length changes the answer — the long version Replied, post #64 · Practice › Administration · 25 May 2026 · 0 likes Post #62 describes the usual case. This is about the unusual one. Bleeding at the site is common and unremarkable at these needle gauges. Persistent bruising in the…
[2026 update] Storing lyophilised material long term: what governs the shelf life Replied, post #122 · Practice › Storage & stability · 25 May 2026 · 2 likes I read post #118 twice before replying, because I had assumed the opposite. Visible particulate is a strong signal in the other direction: it is a reason to stop and…
Forced degradation studies: designing one that is informative Replied, post #61 · Analytics › Method validation · 23 May 2026 · 0 likes The most useful single question about a method: what would it fail to detect? Every method has an answer and few documents state it. Nothing above should be read as…
MS/MS sequence confirmation: what it costs and when it is worth it Started this topic · Analytics › Mass spectrometry · 20 May 2026 · 24 likes MS/MS sequence confirmation: what it costs and when it is worth it — setting out what I have, and where I think it stops being reliable. I would like to understand what…
Reading a trial's population section before its results Replied, post #33 · Evidence › Trials · 19 May 2026 · 3 likes An open-label trial is not worthless and its subjective endpoints deserve more scepticism than its objective ones. That is a graded judgement rather than a verdict.
Follow-up: A parcel that arrived warm: a decision process, not a verdict Replied, post #33 · Practice › Storage & stability · 19 May 2026 · 4 likes I read post #31 twice before replying, because I had assumed the opposite. Clarity is a weak test. A solution can lose a significant fraction of its active content to…
Why oral semaglutide needs an absorption enhancer at all — one year on Replied, post #13 · Compounds › Oral incretins · 19 May 2026 · 0 likes Why administration conditions matter for oral semaglutide and not for injectables: the oral formulation depends on a transient pH effect in the stomach. Anything that…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #16 · Compounds › Semaglutide · 4 May 2026 · 3 likes I disagree with the framing of semaglutide and gastric emptying above, and I think it is a substantive disagreement rather than a terminological one. Setting out why,…
Stepping down deliberately, and how to do it without losing progress Replied, post #103 · Practice › Dosing & titration · 3 May 2026 · 12 likes Picking up post #102: that is the part I would want checked first. A titration plan written down in advance is easier to stick to and easier to abandon deliberately. An…
Revisiting: A field-by-field walk through a certificate of analysis Replied, post #11 · Analytics › COA interpretation · 29 Apr 2026 · 9 likes Adding the measurement that post #10 says would settle it. An itemised related-substances table with retention times says considerably more about the synthesis than a…
MS/MS sequence confirmation: what it costs and when it is worth it — what changed since Replied, post #20 · Analytics › Mass spectrometry · 22 Apr 2026 · 0 likes Combining a chromatographic result with a mass result is genuinely orthogonal confirmation. Either alone leaves a specific class of problem invisible, and the two…
Subgroup analyses: pre-specified versus discovered — a second dataset Replied, post #48 · Evidence › Trials · 17 Apr 2026 · 7 likes Absolute numbers, not just relative: a 30% relative reduction tells you the ratio but not the practical magnitude. The event rate in each arm and the difference between…
List price versus negotiated price versus what you pay Replied, post #46 · Access › Pricing · 12 Apr 2026 · 0 likes I had written a reply contradicting post #44 and deleted it. Here is what survived. I have been on both sides of the list price versus negotiated price argument in this…
GLP-1 receptor distribution: central and peripheral — one year on Replied, post #3 · Pharmacology › Receptor biology · 9 Apr 2026 · 0 likes Receptor distribution explains the side-effect profile better than anything else. GLP-1 receptors in the gastrointestinal tract and the area postrema account for most…
[2026 update] 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #17 · Devices › Syringes & needles · 8 Apr 2026 · 0 likes Reading the barrel at eye level matters more than any equipment choice. Parallax at a shallow angle is enough to shift a reading by a graduation. None of the above is…
Price changes over 2025 and 2026, tabulated and dated — does this still hold? Replied, post #123 · Access › Pricing · 22 Mar 2026 · 9 likes I would rather this thread reach "we do not know" about Price changes than reach a confident answer that nobody can support when asked.
Revisiting: Liver enzymes drifting down and what that usually means Replied, post #13 · Clinical › Bloodwork · 19 Mar 2026 · 7 likes Glycaemic markers integrate over different periods. A point glucose and a longer-term marker disagreeing is not a contradiction; it is two different questions. If this…
Reading a preclinical wound-healing model and its relevance to a human tendon — a second… Replied, post #64 · Compounds › Repair & healing peptides · 14 Mar 2026 · 0 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…
Personal import allowances, compared — a second dataset Replied, post #81 · Access › International · 8 Mar 2026 · 0 likes Where I part company with post #77, and it is a narrow parting. For anyone finding this later: the short answer on Personal import allowances is that it depends on one…
Contributing data without breaching anyone's privacy Replied, post #58 · Data & Tools › Datasets · 6 Mar 2026 · 2 likes Self-reported, unblinded, self-selected data has known biases and is still worth collecting, provided every one of those words appears in the description.
The 2.5 mg starting dose is not a therapeutic dose — why that matters Replied, post #14 · Compounds › Tirzepatide · 12 Feb 2026 · 0 likes I read post #12 twice before replying, because I had assumed the opposite. The 2.5 mg starting dose is not a therapeutic dose in the sense that weight loss is minimal…
Foaming during reconstitution and whether it matters — the long version Replied, post #30 · Practice › Reconstitution · 10 Feb 2026 · 0 likes Post #27 is the version of this I will quote in future. One addition. I would put moderate confidence on the mainstream reading of Foaming during reconstitution and no…
Adducts: sodium, potassium, and the peak you did not expect — does this still hold? Replied, post #16 · Analytics › Mass spectrometry · 23 Jan 2026 · 0 likes Adducts: I would want to see the raw numbers rather than the summary before agreeing. Summaries lose exactly the information that would settle this.
Anxiety in the first weeks: drug, situation, or both — what changed since Replied, post #73 · Wellbeing › Mental health · 6 Jan 2026 · 28 likes Narrowing post #71, because the general version has more than one answer. Tracking mood alongside dose and weeks, on a simple scale, produces a record that is far more…
Revisiting: Language barriers in accessing a prescription abroad Replied, post #40 · Access › International · 4 Jan 2026 · 0 likes Thank you for the correction. I would rather find out here than later.
Aggregates and why a purity assay may miss them entirely Replied, post #47 · Analytics › Impurities & related substances · 3 Jan 2026 · 0 likes What would change my mind on aggregates is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I would rather say so than…
Coming back to: Private prescribing in the UK: what is actually involved Replied, post #30 · Regional › UK & Ireland · 2 Jan 2026 · 15 likes Private prescribing is legal and widespread, including through remote consultation. Pharmacies must satisfy themselves that a prescription is clinically appropriate.…
Second pass at: Robustness: the parameters worth deliberately varying Replied, post #34 · Analytics › Method validation · 19 Dec 2025 · 3 likes Since Robustness keeps coming up, it should probably be a maintained page rather than a recurring thread. I am happy to draft it if someone with more direct experience…
The decimal-point error, and the habit that catches it Replied, post #87 · Practice › Reconstitution · 17 Dec 2025 · 20 likes Write the reconstitution date and the concentration on the vial. Not on a note, on the vial. Every account here of a dosing error involving the wrong concentration…
Filter needles: when they help and what they cost you Replied, post #6 · Devices › Syringes & needles · 16 Dec 2025 · 1 like Coming back to post #4, because the follow-up matters more than the original answer. Agreed on filter needles, with one qualification that I think matters. The…
Prescription requirements and telehealth models Replied, post #53 · Sourcing › Regulatory · 7 Dec 2025 · 29 likes Prescription requirements and telehealth models is well covered in the tag pages, and the older discussions are better than the recent ones because they were argued out…
Freeze-thaw and why one cycle is not the same as five Replied, post #21 · Practice › Storage & stability · 10 Nov 2025 · 10 likes Visible particulate is a strong signal in the other direction: it is a reason to stop and ask rather than to filter and proceed.
Tracking that stops updating and then resumes Replied, post #39 · Sourcing › Logistics · 25 Oct 2025 · 1 like Import restrictions by jurisdiction: what is legal to import for personal use varies enormously by country. Some jurisdictions are quite permissive; others are not.…
What happens after your first post: likes, trust levels, and why none of it matters much… Replied, post #118 · Start Here › Welcome · 23 Oct 2025 · 10 likes Welcome. The orientation materials are pinned at the top of this category and they take about an hour. They answer most of the questions a new member has and they save…
Journal club: STEP-HFpEF and symptom endpoints — a second dataset Replied, post #11 · Evidence › Journal club · 14 Sep 2025 · 28 likes I read post #9 twice before replying, because I had assumed the opposite. Before the thread moves on from step-hfpef and symptom endpoints — what is the sample size…
Adolescents: a distinct evidence base — one year on Replied, post #16 · Clinical › Special populations · 13 Sep 2025 · 2 likes Adding the measurement that post #13 says would settle it. The absence of a reported signal in a population that was barely enrolled is not evidence about that…
Follow-up: Why appetite effects are mostly central Replied, post #37 · Pharmacology › Receptor biology · 10 Sep 2025 · 1 like Everything in post #33 holds. The case it does not cover is the one I have. What I want from this appetite effects thread is the list of things that would need to be…
Reading a combination trial: attributing effect to components Replied, post #4 · Compounds › Cagrilintide & amylin analogues · 19 Aug 2025 · 4 likes Everything in the opening post holds. The case it does not cover is the one I have. Nausea appears in the amylin-analogue literature as it does in the incretin…
Coming back to: Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #119 · Compounds › Semaglutide · 14 Aug 2025 · 26 likes Nobody has said the unglamorous part of Semaglutide half-life yet, so: most of the variation is explained by things that are boring to write about and easy to check.
Journal club: the retatrutide phase 2 obesity paper Replied, post #5 · Evidence › Journal club · 7 Aug 2025 · 7 likes On post #4 — agreed on the reasoning, with one qualification. Session format: read the paper before posting. The discussion is much better when everyone has. Start with…
How to ask about something you suspect is a bad idea Started this topic · Start Here › How to Ask · 3 Aug 2025 · 21 likes The question in the title: How to ask about something you suspect is a bad idea I will give what I have already checked below so nobody repeats it. Question in the…
Follow-up: Why we hide unevidenced fraud accusations and log the hiding Replied, post #6 · Sourcing › Red flags · 22 Jul 2025 · 9 likes Prices well below the rest of the market are a fact rather than a finding. They are worth noting and they do not establish anything on their own.
[2026 update] What we do not know about retatrutide, listed explicitly Replied, post #18 · Compounds › Retatrutide · 21 Jul 2025 · 26 likes TRIUMPH is phase 3 and it is ongoing. No phase 3 results exist. Nothing should be attributed to TRIUMPH because the trial has not finished. When it does, this page will…
Why fasting instructions for oral semaglutide are not optional advice — does this still… Replied, post #61 · Compounds › Oral incretins · 9 Jul 2025 · 10 likes Taking post #60 at face value and following it one step further. Research-use-only oral material is not a licensed tablet and there is no reason to assume it carries a…
Coming back to: Nausea profile of amylin analogues compared with GLP-1 agonists Replied, post #12 · Compounds › Cagrilintide & amylin analogues · 6 Jul 2025 · 19 likes Cagrilintide molecular characteristics: it is a synthetic amylin analogue, substituted to prevent the amyloidogenicity of human amylin. The sequence is short and…
Coming back to: The SOUL trial and oral semaglutide cardiovascular outcomes Replied, post #11 · Compounds › Oral incretins · 21 Jun 2025 · 2 likes Dose equivalence between oral and injectable formulations is not a simple conversion and no published factor should be used as one. The two were developed and titrated…
Needle changes between doses on a reusable pen Replied, post #14 · Devices › Pens & autoinjectors · 13 Jun 2025 · 0 likes Confirming post #13 from a second method, which matters more than confirming it from a second person. Needle changes between doses are specified for a reason and the…
Pre-registering a personal experiment, seriously Replied, post #36 · Research Methods › N-of-1 designs · 28 May 2025 · 28 likes A methods point on pre-registering a personal experiment rather than a substantive one: if the comparison is not like for like, the difference you are measuring is the…
Asking about a compound your prescriber has not heard of Replied, post #49 · Clinical › Prescriber conversations · 26 May 2025 · 0 likes Quietly grateful for the plain phrasing. Not every thread gets that.
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — the long version Replied, post #115 · Practice › Reconstitution · 24 May 2025 · 11 likes Nothing to add on the substance. Thank you for taking the question at face value.
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #7 · Data & Tools › Calculators · 20 May 2025 · 3 likes Dose equivalence calculator: compounds have different potencies. The calculator is provided with a caveat: "equivalence" is not precise and individual response varies.…
Units, standards, and other things that quietly hold the world together Replied, post #36 · Lounge › Off topic · 4 May 2025 · 0 likes A digression that keeps occurring to me: the most-linked documents here are the dullest ones. Nothing gets cited like the unit-arithmetic page.
Metformin co-administration and additive GI effects Replied, post #32 · Practice › Interactions · 4 May 2025 · 26 likes Worth separating two things that post #30 runs together. A request rather than an answer: could whoever has the primary source for metformin co-administration post it?…
Review: a draft on reconstitution arithmetic, with objections Replied, post #122 · Documentation › Doc review · 24 Apr 2025 · 3 likes Coming back to post #120, because the follow-up matters more than the original answer. Nothing in a maintained document is medical advice and the review should confirm…
Requesting a page: what makes a good request Replied, post #62 · Documentation › Wiki requests · 18 Apr 2025 · 1 like A request that says what the page should not cover is unusually helpful, because scope creep is what kills these. I would call that likely rather than established.
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #28 · Evidence › Journal club · 18 Apr 2025 · 7 likes Where I part company with post #26, and it is a narrow parting. Small methodological point on STEP 1: repeating a measurement is cheap and resolves most of what is…
Retatrutide phase 2 in type 2 diabetes: the Lancet paper Started this topic · Compounds › Retatrutide · 26 Mar 2025 · 5 likes On the subject in the title: Retatrutide phase 2 in type 2 diabetes: the Lancet paper Working notes rather than a conclusion. Asking about retatrutide phase 2 in type…
Adjudicated events and why the definition matters — the long version Replied, post #59 · Evidence › Trials · 22 Mar 2025 · 0 likes This follows post #57 rather than contradicting it. Risk of bias: structured appraisal of internal validity. Key things to assess: randomisation method (was it truly…
About the Red flags category Replied, post #4 · Sourcing › Red flags · 3 Mar 2025 · 0 likes 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…
Counter-ion form: the field almost nobody reports — one year on Replied, post #38 · Analytics › COA interpretation · 1 Mar 2025 · 5 likes Taking post #36 at face value and following it one step further. Counterpoint on Counter-ion form, offered without confidence: the same observation is consistent with a…
Random versus fixed effects: choosing rather than defaulting — a second dataset Replied, post #107 · Evidence › Meta-analyses · 13 Feb 2025 · 27 likes Where I part company with post #103, and it is a narrow parting. High heterogeneity is the finding rather than a nuisance to be minimised. If the effect genuinely…
Reading a supplementary appendix and finding the interesting part Replied, post #89 · Evidence › Trials · 10 Feb 2025 · 0 likes Absolute and relative effects answer different questions. Write down the event rate in each arm and the difference between them; everything quotable is derived from…
Second pass at: Obstructive sleep apnoea and a hard endpoint in this class Started this topic · Clinical › Comorbidities · 9 Feb 2025 · 4 likes Second pass at: Obstructive sleep apnoea and a hard endpoint in this class — setting out what I have, and where I think it stops being reliable. Something about…
Random versus fixed effects: choosing rather than defaulting — a second dataset Replied, post #41 · Evidence › Meta-analyses · 2 Feb 2025 · 0 likes Adding a note of thanks rather than an opinion. I did not know most of that.
Fixed versus detachable needles: the trade-offs Replied, post #106 · Devices › Syringes & needles · 11 Jan 2025 · 20 likes Safety-engineered needles are worth using if you have children or anyone else in the house, and the retraction mechanism occupies dead volume that ordinary syringes do…
Recovery when intake is low: what to cut first Replied, post #36 · Nutrition & Training › Resistance training · 11 Jan 2025 · 7 likes Helpful, and easy to find again, which is half of what a good reply is.
Coming back to: When to suspect the method rather than the sample Replied, post #134 · Analytics › Method validation · 25 Dec 2024 · 3 likes Picking up post #131: that is the part I would want checked first. Specificity is the first question: does the method separate the analyte from everything reasonably…
Why pulsatile secretion matters for interpreting secretagogue claims — a second dataset Replied, post #29 · Compounds › Secretagogues & GH axis · 16 Dec 2024 · 3 likes I read the earlier replies on pulsatile secretion twice before writing this, because I had assumed the opposite and wanted to be sure I was disagreeing with what was…
Coming back to: An 18-month record including the parts that went badly Started this topic · Outcomes › Progress reports · 15 Dec 2024 · 4 likes Posting this under the heading it deserves: An 18-month record including the parts that went badly Everything below is what sits behind that. Asking about 18-month…
Promotion criteria, and the one that stops most nominations Replied, post #139 · Documentation › Doc review · 13 Dec 2024 · 19 likes Post #137 put the caveat in the right place and I want to underline it. The most useful review comment names a sentence and says what is wrong with it. General approval…
Type 1 diabetes: off-label use and the evidence gap — what changed since Replied, post #62 · Clinical › Special populations · 24 Nov 2024 · 29 likes The thing about Type 1 diabetes that took me longest to accept is that a plausible mechanism is not evidence of an effect. It is a reason to look, not a result.
Second pass at: Hoarding and why it makes a shortage worse Replied, post #7 · Access › Shortages · 8 Oct 2024 · 20 likes Post #5 put the caveat in the right place and I want to underline it. Dose hold versus tapering: if a temporary shortage forces a gap, holding your dose and resuming…
Revisiting: Five questions in one post gets you one answer — how to split them Replied, post #4 · Start Here › How to Ask · 5 Oct 2024 · 2 likes Seconded. It reads as careful rather than confident, which is the right register.
Why we hide unevidenced fraud accusations and log the hiding Replied, post #2 · Sourcing › Red flags · 28 Sep 2024 · 5 likes Prices well below the rest of the market are a fact rather than a finding. They are worth noting and they do not establish anything on their own.
Hepatic effects of glucagon receptor agonism: the mechanistic worry Replied, post #16 · Compounds › Retatrutide · 3 Sep 2024 · 0 likes Hepatic effects: glucagon receptor agonism promotes hepatic fat oxidation, which is mechanistically plausible for benefit in metabolic liver disease. Whether that…
Circumference measurements as a poor man's composition estimate Replied, post #102 · Outcomes › Body composition · 27 Aug 2024 · 22 likes Post #101 is the version of this I will quote in future. One addition. The thing about circumference measurements that took me longest to accept is that a plausible…
Circumference measurements as a poor man's composition estimate Replied, post #89 · Outcomes › Body composition · 22 Aug 2024 · 0 likes A note on scope: what I am saying about circumference measurements applies to the case in the first post and I would not extend it further without checking.
Reporting a discrepancy without making an allegation Replied, post #34 · Sourcing › Vendor reports · 19 Aug 2024 · 6 likes If someone has run reporting a discrepancy properly I would rather read that than my own reconstruction of it. Posting mine only because the thread has gone quiet.