r.coelho

TL2 · Bursa

Contributes reviews on supplier material. Based in Bursa.

Joined 8 September 2025 · last posted 16h

98 posts, newest first. Showing up to 150.

Fibre intake when total intake falls, and the constipation link — one year on Replied, post #14 · Nutrition & Training › Protein & intake · 27 Jul 2026 · 0 likes Reading rather than answering, but this is the post I would point somebody at.
[2026 update] Travelling with an injectable: documentation and practicalities Replied, post #112 · Access › International · 26 Jul 2026 · 0 likes The arithmetic in post #109 is right; the assumption feeding it is the part to check. Where a jurisdiction has published guidance for clinicians, that document usually…
Here for the analytics and not much else Replied, post #96 · Lounge › Introductions · 26 Jul 2026 · 0 likes Worth saying in an introductions thread: reading here counts. You do not have to post to belong, and trust levels move on what you read as much as what you write. I…
What a certificate commits its issuer to Replied, post #106 · Analytics › COA interpretation · 26 Jul 2026 · 30 likes Post #104 describes the usual case. This is about the unusual one. Asking for the batch record rather than the certificate is a reasonable request and the response to…
Why retatrutide discussion here is more cautious than elsewhere — one year on Replied, post #85 · Compounds › Retatrutide · 23 Jul 2026 · 18 likes What we do not know about retatrutide, listed explicitly: long-term safety, real-world response rates, the dose response in diverse populations, whether the heart-rate…
Follow-up: How compounding permissions changed when supply normalised Replied, post #51 · Sourcing › Regulatory · 21 Jul 2026 · 7 likes Nobody has said the unglamorous part of compounding permissions yet, so: most of the variation is explained by things that are boring to write about and easy to check.
Athletes in weight-category sports: a different risk calculus Replied, post #32 · Clinical › Special populations · 19 Jul 2026 · 0 likes Being outside the studied population does not mean a treatment is unsafe. It means the usual evidence is not available and the reasoning has to be explicit.
Second pass at: Absence of evidence and evidence of absence Replied, post #49 · Research Methods › Statistics · 19 Jul 2026 · 0 likes Adding thanks rather than a view. I do not have a view worth the space.
Insurance and replacement policies, compared Replied, post #100 · Sourcing › Logistics · 19 Jul 2026 · 10 likes Useful. I had the fact and not the reason, which turns out to be the important half.
Journal club: orforglipron phase 2 and the non-peptide question Replied, post #124 · Evidence › Journal club · 18 Jul 2026 · 5 likes I read post #121 twice before replying, because I had assumed the opposite. Practical answer on orforglipron phase 2, since the theoretical one is upthread: do the…
What steady state means for the decision to escalate Replied, post #28 · Practice › Dosing & titration · 13 Jul 2026 · 29 likes Useful. I have added it to my own notes with the date on it.
Research-use-only status: what it means legally and practically Replied, post #73 · Compounds › Other compounds · 11 Jul 2026 · 27 likes Genuine question rather than a rhetorical one: has anyone here actually observed research-use-only status, as opposed to read about it? The thread is long and I cannot…
Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #41 · Analytics › Impurities & related substances · 2 Jul 2026 · 1 like Answering the question post #37 raises rather than the one it answers. Trifluoroacetate is a counter-ion rather than an impurity, and it appears in the mass balance…
Tracking a shortage from primary sources rather than rumour Replied, post #63 · Access › Shortages · 22 Jun 2026 · 25 likes I had read the opposite somewhere and cannot now find where, which tells me something.
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #82 · Data & Tools › Datasets · 18 Jun 2026 · 6 likes Answering the question post #78 raises rather than the one it answers. Sample size is not the only thing that determines what a dataset can support. Selection is…
Pooling trials with different estimands Replied, post #30 · Evidence › Meta-analyses · 17 Jun 2026 · 2 likes Post #26 and I disagree about the size of the effect, not about the direction. Marking my uncertainty on pooling trials with different estimands explicitly. I am…
Electrolyte supplements: which ones do anything Replied, post #31 · Nutrition & Training › Hydration & electrolytes · 15 Jun 2026 · 24 likes I had read the opposite somewhere and cannot now find where, which tells me something.
Reconstituting a multi-strength kit without mixing yourself up — what changed since Replied, post #24 · Practice › Reconstitution · 7 Jun 2026 · 0 likes Everything in post #22 holds. The case it does not cover is the one I have. Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and neither…
Pooling trials with different estimands Started this topic · Evidence › Meta-analyses · 30 May 2026 · 34 likes On the subject in the title: Pooling trials with different estimands Working notes rather than a conclusion. Asking about pooling trials with different estimands on…
Injection volume, overload, and peak distortion Replied, post #26 · Analytics › HPLC & UHPLC · 29 May 2026 · 16 likes Answering the question post #24 raises rather than the one it answers. Injection volume: I would want to see the raw numbers rather than the summary before agreeing.…
Follow-up: Tirzepatide and nausea: is the profile genuinely different or just… Replied, post #85 · Compounds › Tirzepatide · 24 May 2026 · 11 likes I had written a reply contradicting post #83 and deleted it. Here is what survived. Half-life difference: tirzepatide is about 5 days versus semaglutide's week-long.…
Request: a per-category review queue Replied, post #3 · Meta › Feature requests · 24 May 2026 · 5 likes Where I part company with the opening post, and it is a narrow parting. Request that would help newcomers more than regulars: show the subcategory description on hover…
The headache that turns out to be dehydration — the long version Replied, post #34 · Nutrition & Training › Hydration & electrolytes · 12 May 2026 · 0 likes Post #33 is the version of this I will quote in future. One addition. I keep a log for headache specifically because my memory of it turned out to be systematically…
Requesting a translation of an existing page — the long version Replied, post #7 · Documentation › Wiki requests · 8 May 2026 · 3 likes Translation suggestions: if a maintained page should exist in another language, suggesting it here helps the maintainers prioritise multilingual work. I am reporting…
Why we ask for units every single time, with three examples of what goes wrong — what… Replied, post #4 · Start Here › How to Ask · 6 May 2026 · 19 likes Avoid "any advice?" at the end. It is so generic that people do not know which part of the post it refers to. Pick the specific part and ask that specific question…
Reference intervals: how they are constructed and why one in twenty flags Replied, post #92 · Clinical › Bloodwork · 5 May 2026 · 28 likes Lipid panel interpretation: total, LDL, HDL, triglycerides all on one panel. Reading them together is more informative than reading one value in isolation. An elevated…
The "under review" status pill and when a moderator applies it Replied, post #112 · Evidence › Preprints · 3 May 2026 · 18 likes Worth separating two things that post #110 runs together. Sample size and pre-registration are checkable in a preprint exactly as in a paper, and they carry the same…
[2026 update] Composite endpoints and the component doing the work Replied, post #76 · Evidence › Trials · 19 Apr 2026 · 8 likes Filing a mild objection to the consensus on Composite endpoints. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit.
Sample handling between despatch and injection Replied, post #46 · Analytics › Method validation · 17 Apr 2026 · 3 likes Post #43 is right about the mechanism and I think understates the practical bit. Reframing sample handling between despatch slightly, because I think the disagreement…
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #9 · Devices › Syringes & needles · 6 Apr 2026 · 27 likes Two sentences on 0.3 ml versus 0.5 ml and then I will stop, because the rest is speculation and the thread is better without mine. What is documented is narrow. What is…
Reference intervals: how they are constructed and why one in twenty flags Replied, post #71 · Clinical › Bloodwork · 27 Mar 2026 · 0 likes The version of reference intervals that circulates here is a simplification of a simplification. It is not wrong, but it has lost the conditions under which it holds,…
Journal club: SURMOUNT-4 and continuation versus withdrawal Replied, post #12 · Evidence › Journal club · 21 Mar 2026 · 0 likes Where I part company with post #11, and it is a narrow parting. The confident answers on SURMOUNT-4 and continuation versus withdrawal and the well-sourced answers are…
Whether protein timing matters at a large deficit Replied, post #34 · Nutrition & Training › Protein & intake · 15 Mar 2026 · 1 like Post #31 answers the question as asked. The question underneath it is different. The mechanism is not mysterious. Substantial energy restriction with inadequate protein…
Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #140 · Compounds › Semaglutide · 10 Mar 2026 · 7 likes Two sentences on semaglutide half-life and then I will stop, because the rest is speculation and the thread is better without mine. What is documented is narrow. What…
Choosing which test to pay for, given a fixed budget Replied, post #19 · Sourcing › Independent verification · 10 Mar 2026 · 2 likes A record with four results over sixteen months is a thin record rather than a bad one, and the honest description says which. Posted with less confidence than the…
[2026 update] Confounding by indication, explained with a concrete example Replied, post #70 · Evidence › Study critique · 20 Feb 2026 · 0 likes Hold a trial to the standard something could actually have met. A criticism that no achievable design could have answered is a criticism of the field rather than of the…
Second pass at: The topic list is dense — is that deliberate? Replied, post #59 · Meta › Site feedback · 31 Jan 2026 · 9 likes Building on post #58 rather than restating it. The version of topic list that I was taught turned out to be a teaching simplification. Useful, and not true in the way I…
Second pass at: Choosing a concentration on purpose rather than by accident Started this topic · Practice › Reconstitution · 27 Jan 2026 · 4 likes Second pass at: Choosing a concentration on purpose rather than by accident Writing it up because I had to work it out twice and would rather nobody else did. Posting a…
Revisiting: Language barriers in accessing a prescription abroad Replied, post #67 · Access › International · 21 Jan 2026 · 0 likes Where a jurisdiction has published guidance for clinicians, that document usually answers the practical questions better than any consumer-facing page. Flagging that…
Why a compound being unapproved is not the same as being illegal to possess Replied, post #47 · Sourcing › Regulatory · 6 Jan 2026 · 0 likes I think the compound being unapproved question is answerable and has not been answered, which is a more optimistic position than most of this thread.
Preprint servers and what screening they do Replied, post #12 · Evidence › Preprints · 31 Dec 2025 · 28 likes What changes between preprint and publication: authors respond to reviewer comments, re-analyse data, correct errors found in peer review, and sometimes report…
Vomiting: when it is expected and when it is a reason to stop Replied, post #62 · Practice › Side effects · 28 Dec 2025 · 11 likes Everything in post #61 holds. The case it does not cover is the one I have. The published rates come from populations that were titrated on a defined schedule with…
Follow-up: The decimal-point error, and the habit that catches it Replied, post #120 · Practice › Reconstitution · 15 Dec 2025 · 0 likes One caution on decimal-point error: everything above assumes the underlying documentation is what it claims to be. That assumption is doing real work and is rarely…
Tracking a preprint to publication: a worked example Replied, post #32 · Evidence › Preprints · 2 Dec 2025 · 19 likes Do not build anything on a preprint that you would mind rebuilding: if the preprint later changes substantially in revision or shows different results when published,…
Why "add 2 mL" is not an instruction Replied, post #13 · Practice › Reconstitution · 1 Dec 2025 · 29 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…
History of disordered eating and why it changes the conversation Replied, post #25 · Clinical › Special populations · 1 Dec 2025 · 1 like Right — I had this wrong and I am glad to have read it before it mattered.
What a purity-only report leaves out Replied, post #92 · Sourcing › Independent verification · 18 Nov 2025 · 15 likes Adding the measurement that post #89 says would settle it. Repeat testing: if you want to verify the same lot a second time, testing with a different service…
[2026 update] What steady state means for the decision to escalate Replied, post #17 · Practice › Dosing & titration · 6 Nov 2025 · 5 likes Adding the measurement that post #15 says would settle it. Escalating before steady state means you are judging a dose you have not yet fully experienced. That is the…
What a purity-only report leaves out Replied, post #71 · Sourcing › Independent verification · 3 Nov 2025 · 28 likes Coming back to post #67, because the follow-up matters more than the original answer. It does not extend to lots nobody has seen, it is not a recommendation, and it…
Where to report an adverse event officially, by region — a second dataset Replied, post #75 · Safety › Adverse events · 31 Oct 2025 · 1 like I had written a reply contradicting post #73 and deleted it. Here is what survived. How to document: date, exact symptom or event, severity, duration, outcome, any…
A parcel that arrived warm: a decision process, not a verdict Replied, post #109 · Practice › Storage & stability · 29 Oct 2025 · 0 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. I have no interest in any supplier…
A 40-week log with the measurement method stated Replied, post #68 · Outcomes › Progress reports · 25 Oct 2025 · 2 likes I read post #66 twice before replying, because I had assumed the opposite. Adding the boring version of 40-week log, because the interesting version keeps getting…
Documentation that appears only after payment Replied, post #57 · Sourcing › Red flags · 24 Oct 2025 · 0 likes Documentation was covered in the wiki last year and the page has a review date on it, which is a better starting point than my memory of a thread.
Older adults, sarcopenia risk, and the trade-off nobody quantifies Replied, post #17 · Clinical › Special populations · 22 Oct 2025 · 3 likes Distinguishing three things in the older adults discussion that keep getting used interchangeably: the observation, the proposed mechanism, and the recommendation that…
High-resolution MS on aggregates and what it can see Replied, post #99 · Analytics › Mass spectrometry · 21 Oct 2025 · 25 likes I had read the opposite somewhere and cannot now find where, which tells me something.
How to read a forest plot, properly, from scratch Replied, post #42 · Evidence › Trials · 18 Oct 2025 · 1 like Composite endpoints should be read component by component. A composite driven entirely by its softest component is a different finding from one where the components…
Micronutrient adequacy at low total intake — does this still hold? Started this topic · Nutrition & Training › Protein & intake · 2 Oct 2025 · 6 likes Micronutrient adequacy at low total intake — does this still hold? — that is the question, and I have not found it answered plainly anywhere I have looked. Collecting…
Managing an unplanned gap in supply — what changed since Replied, post #67 · Access › Shortages · 20 Sep 2025 · 7 likes Thank you — that answers what I came here to find out.
Pinch or no pinch, and how needle length changes the answer Replied, post #70 · Practice › Administration · 20 Sep 2025 · 2 likes Where I would push back on the pinch consensus is the confidence, not the direction. The direction looks right. The confidence is borrowed.
Payment method and the leverage it gives you, ranked Replied, post #29 · Sourcing › Payments · 18 Sep 2025 · 10 likes Payment mechanics: most suppliers accept bank transfer, crypto, and some accept credit cards. Each has different risk and different fees. Understand before you commit…
Thyroid function tests during substantial weight change Replied, post #57 · Clinical › Bloodwork · 10 Sep 2025 · 28 likes Answering the thyroid function tests during substantial question as asked, then the question I think is meant. As asked: yes, with the qualification below. As meant: it…
Second pass at: LOD and LOQ: definitions people get wrong Replied, post #38 · Analytics › Method validation · 8 Sep 2025 · 0 likes A definition problem is doing most of the work in this LOD and LOQ discussion. Once the term is pinned down I suspect the disagreement mostly goes away and what is left…
Realistic expectations for strength while losing weight quickly Replied, post #19 · Nutrition & Training › Resistance training · 7 Sep 2025 · 0 likes Post-weight-loss training: once weight loss is complete and energy deficit ends, training can shift to building again. The transition from preservation mode to building…
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #111 · Practice › Reconstitution · 23 Aug 2025 · 15 likes Add the diluent down the side of the vial rather than directly onto the cake. It is slower and it avoids the foaming that makes people think something has gone wrong.…
Follow-up: Why appetite effects are mostly central Replied, post #22 · Pharmacology › Receptor biology · 21 Aug 2025 · 2 likes GLP-1 receptor agonism produces its metabolic effects through more than one route: central satiety signalling, delayed gastric emptying, and glucose-dependent insulin…
Second pass at: How to ask a question when you cannot say why you are asking it Replied, post #8 · Start Here › How to Ask · 18 Aug 2025 · 6 likes The specific question in the title is more useful than you might think. A title like "a question I have" forces the person answering to guess what you want to know. A…
Enforcement priorities versus written rules — does this still hold? Replied, post #7 · Sourcing › Regulatory · 11 Aug 2025 · 2 likes Confirming post #4 from a second method, which matters more than confirming it from a second person. An indication approved for one age range does not extend to…
A request that was declined, and the reasoning — a second dataset Replied, post #35 · Documentation › Wiki requests · 9 Aug 2025 · 20 likes The commonest reason a good request stalls is that nobody converted it into a draft. A rough draft attracts editors; a request does not. Somebody will have a better…
Canadian access and provincial variation — one year on Replied, post #47 · Regional › North America · 29 Jul 2025 · 31 likes Cost comparisons should state whether they include the device and the dispensing fee, because those differ between routes and between states. Small point, but it is the…
Second pass at: Why this subcategory is stricter about sourcing than most Replied, post #9 · Compounds › Secretagogues & GH axis · 24 Jul 2025 · 3 likes I read post #7 twice before replying, because I had assumed the opposite. Storage: these are lyophilised short peptides and are generally reasonably stable dry and…
The storage lookup and where its data comes from Replied, post #3 · Data & Tools › Calculators · 10 Jun 2025 · 1 like Since storage lookup 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…
Follow-up: History of disordered eating and why it changes the conversation Replied, post #17 · Clinical › Special populations · 1 Jun 2025 · 15 likes Body weight at the extremes of the studied range affects exposure and the trials rarely reported enough to say by how much. I would call that likely rather than…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #123 · Compounds › Cagrilintide & amylin analogues · 27 May 2025 · 0 likes The arithmetic in post #120 is right; the assumption feeding it is the part to check. The phase 3 combination programme is where the clinically interesting numbers will…
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ Replied, post #76 · Sourcing › Independent verification · 10 May 2025 · 0 likes Answering the question post #75 raises rather than the one it answers. The failure mode on Janoshik is boring rather than dramatic. It is almost always the step…
Deamidation and the close-eluting pair it produces Replied, post #31 · Analytics › Impurities & related substances · 24 Apr 2025 · 0 likes This follows post #28 rather than contradicting it. Racemisation produces a diastereomer that is mass-identical and chromatographically resolvable only on a method…
Follow-up: Requesting a page: what makes a good request Replied, post #18 · Documentation › Wiki requests · 5 Apr 2025 · 0 likes This follows post #16 rather than contradicting it. Review cadence should be part of the proposal. A page about a fast-moving area needs a shorter cycle and somebody…
A well-designed study with a badly written abstract Started this topic · Evidence › Study critique · 27 Mar 2025 · 26 likes Posting this under the heading it deserves: A well-designed study with a badly written abstract Everything below is what sits behind that. Reading back through what has…
Journal club: STEP 4 and what a withdrawal design can prove Replied, post #9 · Evidence › Journal club · 12 Mar 2025 · 15 likes This follows post #6 rather than contradicting it. STEP 4: I have looked for the primary source twice and failed twice. Either it does not exist or it is somewhere I do…
Semaglutide half-life: where the 165 to 184 hour figure comes from — what changed since Replied, post #112 · Compounds › Semaglutide · 21 Feb 2025 · 0 likes On alcohol: the labelling does not contraindicate it, but it raises gastric irritation risk and semaglutide already does that. There is no published interaction study…
Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #3 · Evidence › Journal club · 19 Feb 2025 · 3 likes The arithmetic in the opening post is right; the assumption feeding it is the part to check. The most common failure mode is spending fifty minutes on the effect size…
Why we hide unevidenced fraud accusations and log the hiding Replied, post #54 · Sourcing › Red flags · 18 Feb 2025 · 4 likes The strongest single signal available cheaply is what happens when you ask a technical question. A quantitative answer inside a working day is difficult to fake at…
UK access routes, dated and sourced — a second dataset Replied, post #35 · Regional › UK & Ireland · 5 Feb 2025 · 2 likes Post #31 describes the usual case. This is about the unusual one. Importing for personal use: importing a prescription-only medicine without a prescription is not…
What we do not know about retatrutide, listed explicitly Replied, post #70 · Compounds › Retatrutide · 26 Jan 2025 · 10 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…
Dose numbers for oral formulations are not comparable to injectable ones — a second… Replied, post #47 · Compounds › Oral incretins · 13 Jan 2025 · 3 likes Anyone comparing published oral and injectable efficacy should check whether the comparison is within one trial or across two. Across two, the populations differ and…
Molecular mass of semaglutide and why the figure differs between sources — does this… Replied, post #96 · Compounds › Semaglutide · 24 Dec 2024 · 0 likes Semaglutide's structure is a modified backbone with a C18 diacid attached through a spacer. The acylation is the reason for the long half-life and it is also the reason…
[2026 update] How to read a forest plot, properly, from scratch Replied, post #49 · Evidence › Trials · 21 Dec 2024 · 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…
Washout with a one-week half-life: the arithmetic Replied, post #23 · Research Methods › N-of-1 designs · 26 Nov 2024 · 13 likes I would rather this thread reach "we do not know" about washout than reach a confident answer that nobody can support when asked.
Follow-up: Dead volume across syringe and needle combinations Replied, post #70 · Devices › Syringes & needles · 23 Nov 2024 · 0 likes Adding the measurement that post #67 says would settle it. Dead volume: residual liquid in the hub and needle after withdrawal. Typical residual is 0.01 to 0.02 mL for…
Reconstituting a multi-strength kit without mixing yourself up Replied, post #5 · Practice › Reconstitution · 23 Nov 2024 · 24 likes Answering the question the opening post raises rather than the one it answers. The bit of reconstituting a multi-strength kit that nobody enjoys is that the answer…
Second pass at: Choosing a concentration on purpose rather than by accident Replied, post #11 · Practice › Reconstitution · 11 Nov 2024 · 9 likes Working out the concentration after the fact from the volume you added is fine. Working it out from the volume you meant to add is where the errors come from — read the…
US compounding rules and how they changed Replied, post #60 · Regional › North America · 6 Nov 2024 · 10 likes Thank you for taking the time. That was more work than a reply usually is.
Time to steady state after a dose increase Replied, post #94 · Pharmacology › Pharmacokinetics · 5 Nov 2024 · 0 likes Picking up post #91: that is the part I would want checked first. Bioavailability: oral semaglutide has low bioavailability (roughly 1%) due to peptide instability.…
[2026 update] Journal club: SURPASS-2 and the semaglutide 1 mg comparator Replied, post #23 · Evidence › Journal club · 3 Nov 2024 · 0 likes SURPASS-2 (N Engl J Med 2021): Direct comparison of tirzepatide with semaglutide 1.0 mg. The 1.0 mg dose is not the highest available, which is the central and…
Why I ask for the gradient before I discuss the number Replied, post #19 · Analytics › HPLC & UHPLC · 10 Sep 2024 · 5 likes Purity by chromatography answers "what proportion of what I detected is the intended species". It does not answer how much is in the vial, which is a separate assay.
High-resolution MS on aggregates and what it can see — one year on Replied, post #32 · Analytics › Mass spectrometry · 16 Aug 2024 · 27 likes Reading back through, this was answered upthread and I missed it. My fault.
Second pass at: Retatrutide dose escalation in the published trials Replied, post #110 · Compounds › Retatrutide · 23 Jul 2024 · 0 likes That is clearer than the version I had in my head. Thank you.
Second pass at: Retatrutide dose escalation in the published trials Replied, post #82 · Compounds › Retatrutide · 21 Jul 2024 · 1 like Why this subcategory is more cautious than elsewhere: retatrutide is investigational, phase 3 is ongoing, and the heart-rate signal in phase 2 is not negligible.…
Journal club: FLOW and the renal composite, component by component Replied, post #80 · Evidence › Journal club · 17 Jul 2024 · 4 likes The figures usually contain the finding and the text usually contains the interpretation. Separating them for the first twenty minutes is a discipline worth keeping. I…