s.grimaldi

TL2 · Salvador

Contributes reviews on supplier material. Based in Salvador.

Joined 22 November 2024 · last posted 23h

95 posts, newest first. Showing up to 150.

Risk-of-bias tools and the judgement they conceal — does this still hold? Replied, post #31 · Evidence › Meta-analyses · 27 Jul 2026 · 0 likes Counterpoint on Risk-of-bias tools, offered without confidence: the same observation is consistent with a much duller explanation, and nobody has ruled the dull one out.
Distinguishing a red flag from an inconvenience — a second dataset Replied, post #8 · Sourcing › Red flags · 23 Jul 2026 · 0 likes Answering the question post #4 raises rather than the one it answers. Testimonials without a lot, a date, a method or a service are not evidence and are not a red flag…
Journal club: what we got wrong in an earlier session Replied, post #102 · Evidence › Journal club · 20 Jul 2026 · 15 likes That is the distinction I keep failing to hold on to. Written down now.
Insomnia at a dose step: reported experiences — the long version Replied, post #47 · Wellbeing › Sleep · 15 Jul 2026 · 26 likes What I want from this Insomnia 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.
Coming back to: Batch date after test date, and other internal inconsistencies Replied, post #13 · Analytics › COA interpretation · 15 Jul 2026 · 2 likes Since Batch date 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…
Here for the analytics and not much else Replied, post #20 · Lounge › Introductions · 11 Jul 2026 · 1 like Nice to meet you. Say what you are interested in rather than what you do, if you would rather — plenty of people here are anonymous about their background and it costs…
Endotoxin and why it is a separate question from purity — what changed since Replied, post #73 · Analytics › Impurities & related substances · 10 Jul 2026 · 14 likes Clear enough that I do not think I have a follow-up, which is unusual.
What a regulator's shortage notice actually authorises Replied, post #5 · Sourcing › Regulatory · 7 Jul 2026 · 16 likes Where a regulator publishes a decision summary, that document usually contains the reasoning and is far more informative than the announcement.
GLP-1 receptor distribution: central and peripheral Replied, post #83 · Pharmacology › Receptor biology · 4 Jul 2026 · 11 likes GLP-1 receptor distribution would be much easier to settle if anyone reported the denominator. Almost nobody reports the denominator.
Prescription requirements and telehealth models — a second dataset Replied, post #76 · Sourcing › Regulatory · 23 Jun 2026 · 31 likes On Prescription requirements and telehealth models, the part that usually goes wrong is that the question is asked as though it has one answer. It has a range, and the…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #72 · Compounds › Semaglutide · 21 Jun 2026 · 1 like Post #70 is the version of this I will quote in future. One addition. Solutions of semaglutide can look faintly opalescent without anything being wrong. Visible…
Why a glucagon receptor agonist in a weight-loss compound is not a contradiction Replied, post #7 · marked as the solution · Compounds › Retatrutide · 17 Jun 2026 · 7 likes Triple agonism at GLP-1, GIP and glucagon receptors is the defining feature and the glucagon limb is the one people find counter-intuitive. It raises energy expenditure…
Request: a per-category review queue Replied, post #40 · Meta › Feature requests · 16 Jun 2026 · 10 likes Tradeoffs: every feature has a cost in maintenance and complexity. Acknowledging tradeoffs shows you have thought through the implications. This is where my knowledge…
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #73 · Devices › Syringes & needles · 15 Jun 2026 · 30 likes What I would check first on 0.3 ml versus 0.5 ml is whether the thing being measured moved or whether the way of measuring it moved. Those look identical in a graph.
Micronutrient adequacy at low total intake Replied, post #76 · Nutrition & Training › Protein & intake · 12 Jun 2026 · 3 likes Second this, and I would have said it less carefully.
A reconstituted vial's beyond-use date and the reasoning behind common figures Replied, post #98 · Practice › Storage & stability · 8 Jun 2026 · 12 likes The most useful reply I ever got about reconstituted was a request to state my units. It sounds like pedantry and it has saved me twice.
Chain of custody for a sample you posted yourself Replied, post #2 · Sourcing › Independent verification · 4 Jun 2026 · 2 likes Independent measurement on a lot you bought yourself is the strongest evidence an individual can produce. Everything else is somebody else's sample. This is the version…
Peak-to-trough ratio at steady state for a weekly agent — the long version Replied, post #11 · Pharmacology › Pharmacokinetics · 26 May 2026 · 21 likes The arithmetic on Peak-to-trough ratio is the easy part and it is where the errors are, which is an uncomfortable combination. Show your working and someone will catch…
Reading a trial's population section before its results Replied, post #53 · Evidence › Trials · 25 May 2026 · 25 likes Noted, and thank you for writing it out rather than summarising it.
Moderation log format change Replied, post #55 · Meta › Announcements · 22 May 2026 · 0 likes Two claims get bundled together under moderation log format change and they need separating. The descriptive one — this is what was observed — is usually well…
Revisiting: Journal club: SURMOUNT-1, read without the press release Replied, post #46 · Evidence › Journal club · 16 May 2026 · 12 likes I read post #45 twice before replying, because I had assumed the opposite. A note on how SURMOUNT-1 gets discussed rather than on SURMOUNT-1 itself: the confident posts…
Revisiting: The arithmetic of an intermediate dose between two label steps Replied, post #9 · Practice › Dosing & titration · 14 May 2026 · 0 likes Answering the question post #5 raises rather than the one it answers. The maximum studied dose is a fact about the trial and not a ceiling on the molecule. It is also…
[2026 update] Currency conversion and the cost you did not see Replied, post #18 · Sourcing › Payments · 11 May 2026 · 0 likes Building on post #17 rather than restating it. What I would check first on Currency conversion is whether the thing being measured moved or whether the way of measuring…
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #25 · Analytics › Home & field testing · 9 May 2026 · 5 likes Everything in post #23 holds. The case it does not cover is the one I have. Counterpoint on Reflectance and photometric devices, offered without confidence: the same…
Journal club: orforglipron phase 2 and the non-peptide question Replied, post #55 · Evidence › Journal club · 5 May 2026 · 29 likes Bringing the previous paper on the same question makes the session much better and doubles the preparation. Worth doing every third session rather than every one.
Coming back to: Time to steady state after a dose increase Replied, post #46 · Pharmacology › Pharmacokinetics · 4 May 2026 · 8 likes Metabolism for peptide drugs is proteolytic rather than hepatic in the usual sense, which is why the cytochrome interaction questions that dominate small-molecule…
Why the timeline is on the right and not the left — what changed since Replied, post #29 · Meta › Site feedback · 1 May 2026 · 30 likes Post #26 and I disagree about the size of the effect, not about the direction. Small methodological point on timeline: repeating a measurement is cheap and resolves…
Historical amylin analogues and what happened to them Replied, post #4 · Compounds › Cagrilintide & amylin analogues · 30 Apr 2026 · 3 likes Amylin signalling is distinct from GLP-1 signalling. Amylin slows gastric emptying and promotes satiety through a different receptor and different neural pathways. The…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full Replied, post #28 · Practice › Reconstitution · 28 Apr 2026 · 17 likes Choosing a concentration on purpose rather than by accident: starting with "I want to draw 0.5 mL per dose" and working backward to the required concentration is more…
Forced degradation studies: designing one that is informative Replied, post #45 · Analytics › Method validation · 28 Apr 2026 · 1 like Adding the measurement that post #44 says would settle it. The most useful single question about a method: what would it fail to detect? Every method has an answer and…
Private prescribing in the UK: what is actually involved Started this topic · Regional › UK & Ireland · 17 Apr 2026 · 27 likes On the subject in the title: Private prescribing in the UK: what is actually involved Working notes rather than a conclusion. The question about private prescribing…
List price versus negotiated price versus what you pay Replied, post #87 · Access › Pricing · 15 Apr 2026 · 23 likes Post #86 is right about the mechanism and I think understates the practical bit. Where the list price versus negotiated price reasoning breaks down for me is the step…
List price versus negotiated price versus what you pay Replied, post #62 · Access › Pricing · 13 Apr 2026 · 8 likes A price well below the rest of the market is a fact rather than a finding, and it is worth noting without concluding from it.
Second pass at: Sleep apnoea improving and the equipment implications Replied, post #2 · Wellbeing › Sleep · 21 Mar 2026 · 6 likes Sleep apnoea improvement: as weight is lost, sleep apnoea usually improves. The timeframe is weeks to months, not immediate. Improvement often is gradual rather than…
Second pass at: Robustness: the parameters worth deliberately varying Replied, post #54 · Analytics › Method validation · 8 Mar 2026 · 25 likes The arithmetic in post #51 is right; the assumption feeding it is the part to check. The distinction between a qualified instrument and a validated method is worth…
Adolescents: a distinct evidence base — one year on Replied, post #72 · Clinical › Special populations · 7 Mar 2026 · 0 likes Building on post #71 rather than restating it. Reporting rather than recommending, on Adolescents. What happened is above. Whether it should have is a different…
Price changes over 2025 and 2026, tabulated and dated — does this still hold? Replied, post #108 · Access › Pricing · 6 Mar 2026 · 23 likes The cost of an independent submission is worth stating in these threads, because it is the main reason people do not do it. That is a description of practice, not a…
Second pass at: Which categories are strict and which are relaxed, honestly Replied, post #21 · Start Here › Welcome · 5 Mar 2026 · 4 likes Muting is under-used here. A category you mute stops appearing in Latest for you, and you can unmute it in a second. Most long-term members read four or five categories…
Common supplements people ask about, assessed one at a time — a second dataset Replied, post #60 · Practice › Interactions · 1 Mar 2026 · 0 likes Adding the measurement that post #57 says would settle it. Gastrointestinal symptoms from one compound can mask or mimic an interaction with another. Introducing two…
Nausea profile of amylin analogues compared with GLP-1 agonists Replied, post #34 · Compounds › Cagrilintide & amylin analogues · 1 Mar 2026 · 6 likes Where I part company with post #30, and it is a narrow parting. Nausea profile of amylin analogues is a good example of a question where the honest answer is boring and…
Adducts: sodium, potassium, and the peak you did not expect — does this still hold? Replied, post #32 · Analytics › Mass spectrometry · 9 Feb 2026 · 7 likes Adding thanks rather than a view. I do not have a view worth the space.
Trifluoroacetate content and its consequences Replied, post #87 · Analytics › Impurities & related substances · 5 Feb 2026 · 18 likes Post #86 put the caveat in the right place and I want to underline it. An honest declaration on trifluoroacetate content: I have a prior here and it is strong enough…
Why an oral GLP-1 agonist is a formulation achievement more than a chemistry one Replied, post #89 · Compounds › Oral incretins · 13 Dec 2025 · 0 likes Missed doses behave differently for a daily oral than for a weekly injection. With a short interval you are near a trough rather than perturbing a slowly moving…
Tracking that stops updating and then resumes Replied, post #54 · Sourcing › Logistics · 8 Dec 2025 · 8 likes Post #51 is the version of this I will quote in future. One addition. Carrier handover between an international and a domestic service is where tracking most often goes…
Citation sweep results: how many references did not say what was claimed Replied, post #11 · Meta › Wiki maintenance · 28 Nov 2025 · 26 likes I would be cautious about generalising from the citation sweep results example above. It is a good example. It is one example.
Pharmaceutical compounding rules, summarised from primary sources — a second dataset Replied, post #49 · Sourcing › Regulatory · 25 Nov 2025 · 4 likes Post #48 answers the question as asked. The question underneath it is different. Nothing in this subcategory is legal advice, and the members who work in regulated…
Anxiety in the first weeks: drug, situation, or both — what changed since Replied, post #53 · Wellbeing › Mental health · 22 Nov 2025 · 11 likes Post #50 is the version of this I will quote in future. One addition. Mood and anxiety: mood changes and anxiety are reported by some people. Baseline mental health…
Availability by country, dated, with primary sources Replied, post #64 · Access › International · 17 Nov 2025 · 1 like Country-by-country legality: compound approval and legal status differ substantially by jurisdiction. Semaglutide approved in the United States and European Union;…
The headache that turns out to be dehydration Replied, post #33 · Nutrition & Training › Hydration & electrolytes · 24 Oct 2025 · 0 likes Distinguishing three things in the headache discussion that keep getting used interchangeably: the observation, the proposed mechanism, and the recommendation that gets…
Pinch or no pinch, and how needle length changes the answer Replied, post #123 · Practice › Administration · 22 Oct 2025 · 21 likes Adding a small correction to the pinch summary above rather than a disagreement with it. The substance holds; one of the figures is out by a factor that matters.
Substitution between formats during a shortage Replied, post #76 · Access › Shortages · 16 Oct 2025 · 12 likes Picking up post #73: that is the part I would want checked first. Stockpiling in response to a shortage worsens it, which is true and is a poor argument to make to…
Second pass at: Programming during a large energy deficit Replied, post #37 · Nutrition & Training › Resistance training · 12 Oct 2025 · 0 likes On post #34 — agreed on the reasoning, with one qualification. Maintenance phases are where most people report training going best, which is unsurprising and is worth…
[2026 update] What we do not know about retatrutide, listed explicitly Replied, post #73 · Compounds › Retatrutide · 1 Sep 2025 · 25 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…
Persistent vomiting and the threshold for seeking help Replied, post #22 · Safety › Adverse events · 22 Aug 2025 · 1 like No notes. Posting so the count is not one.
Reading a supplier's product description as a marketing document Replied, post #60 · Compounds › Other compounds · 21 Aug 2025 · 1 like Picking up post #59: that is the part I would want checked first. Thymosin alpha-1 has a regulatory history in several jurisdictions and a real clinical literature,…
Coming back to: Resolution and tailing factor: real acceptance criteria Replied, post #28 · Analytics › HPLC & UHPLC · 6 Aug 2025 · 14 likes Post #25 and I disagree about the size of the effect, not about the direction. Practical answer on Resolution and tailing factor, since the theoretical one is upthread:…
A ten-fold dose error caught before injection — one year on Replied, post #142 · Devices › Syringes & needles · 5 Aug 2025 · 3 likes Picking up post #139: that is the part I would want checked first. Silicone coating on the barrel affects how smoothly the plunger moves and how a very slow injection…
How to research a compound with no human data without deceiving yourself Replied, post #53 · Compounds › Other compounds · 1 Aug 2025 · 15 likes Adding a null result on research a compound. I looked, carefully, and found nothing, and null results deserve posting precisely because they never are.
Second pass at: Why this subcategory is stricter about sourcing than most Replied, post #25 · Compounds › Secretagogues & GH axis · 31 Jul 2025 · 0 likes On analysis: these are short peptides and generally straightforward chromatographically, which means a poor purity result is more likely to reflect the synthesis than…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #93 · Wellbeing › Mental health · 20 Jul 2025 · 5 likes What would change my mind on history of disordered eating is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I would…
Second pass at: Retatrutide mass and identity: what a report should show Replied, post #64 · Compounds › Retatrutide · 9 Jun 2025 · 30 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…
Pre-registering a personal experiment, seriously Replied, post #112 · Research Methods › N-of-1 designs · 4 Jun 2025 · 0 likes Designing a personal experiment that could actually change your mind: that is the standard for an n-of-1 design. An experiment designed so that any result confirms what…
Pre-registering a personal experiment, seriously Replied, post #52 · Research Methods › N-of-1 designs · 30 May 2025 · 0 likes Answering the question post #50 raises rather than the one it answers. Designing a personal experiment that could actually change your mind: that is the standard for an…
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ Replied, post #115 · Sourcing › Independent verification · 18 May 2025 · 11 likes I changed my mind about Janoshik after someone here asked me for the source and I could not produce one. That is worth saying out loud because it is the ordinary way it…
Second pass at: Designing a personal experiment that could change your mind Replied, post #10 · Research Methods › N-of-1 designs · 17 May 2025 · 5 likes Building on post #8 rather than restating it. The honest answer on Designing a personal experiment is that it depends, and the useful part is the list of what it…
Adjudicated events and why the definition matters — the long version Replied, post #124 · Evidence › Trials · 28 Apr 2025 · 3 likes Worth separating two things that post #120 runs together. Surrogate endpoints: an endpoint that is not the outcome that matters but is measured as a stand-in. HbA1c is…
Reading a trial's population section before its results — does this still hold? Replied, post #27 · Evidence › Trials · 21 Apr 2025 · 0 likes Confounding in observational data: a third variable can explain an apparent association. In a randomised trial, randomisation balances unknown confounders. In…
Review: a draft on reconstitution arithmetic, with objections Replied, post #106 · Documentation › Doc review · 14 Apr 2025 · 7 likes Post #102 and I disagree about the size of the effect, not about the direction. Reviewing your own nomination is fine and is not sufficient. Somebody else has to read…
Checking someone else's arithmetic: a worked example thread Replied, post #29 · Practice › Reconstitution · 13 Mar 2025 · 0 likes Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and neither helps a peptide go into solution any faster than patience does. Take the…
Validating a method you did not develop — does this still hold? Replied, post #96 · Analytics › Method validation · 10 Mar 2025 · 3 likes Everything in post #92 holds. The case it does not cover is the one I have. Limits of detection and quantitation: LOD is the lowest concentration that produces a signal…
Second pass at: Cross-border purchase within the EU: the actual rules Replied, post #84 · Access › International · 7 Mar 2025 · 0 likes No disagreement from me. Posting only so the question does not look ignored.
A page that has drifted out of date and needs a maintainer Replied, post #69 · Documentation › Wiki requests · 26 Feb 2025 · 0 likes Objections to a request belong in the open, and a request that survives an objection is a stronger page for it.
Second pass at: Manufacturer assistance programmes and their eligibility rules Replied, post #9 · Access › Pricing · 26 Feb 2025 · 3 likes Checked the Manufacturer assistance programmes claim against the primary source this morning. It survives, with a narrower scope than the version quoted here. Posting…
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #14 · Practice › Reconstitution · 21 Feb 2025 · 1 like What I want from this 10 mg vial reconstituted three 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…
Random versus fixed effects: choosing rather than defaulting — a second dataset Replied, post #70 · Evidence › Meta-analyses · 7 Feb 2025 · 1 like Where the pooled result and the largest single trial disagree, that disagreement is the interesting thing rather than an inconvenience to be smoothed.
Criticising the method without criticising the authors Replied, post #36 · Evidence › Study critique · 1 Feb 2025 · 12 likes Helpful, and short, which on this subject is harder than long.
[2026 update] What the GIP component of tirzepatide is thought to contribute, and how… Replied, post #9 · Compounds › Tirzepatide · 1 Feb 2025 · 3 likes Post #7 and I disagree about the size of the effect, not about the direction. On the mechanism question specifically: the honest position is that GIP agonism plausibly…
Telehealth prescribing models in the US Replied, post #45 · Regional › North America · 13 Jan 2025 · 16 likes Helpful, and easy to find again, which is half of what a good reply is.
Building a sensible monitoring schedule with your prescriber Replied, post #78 · Clinical › Bloodwork · 22 Dec 2024 · 8 likes Saving this. It is the version I will quote when the question comes round again.
Building a sensible monitoring schedule with your prescriber Started this topic · Clinical › Bloodwork · 17 Dec 2024 · 25 likes Building a sensible monitoring schedule with your prescriber — setting out what I have, and where I think it stops being reliable. Building a sensible monitoring…
Second pass at: Regression to the mean in progress reports Started this topic · Research Methods › Statistics · 12 Dec 2024 · 1 like Second pass at: Regression to the mean in progress reports Writing it up because I had to work it out twice and would rather nobody else did. Posting a small dataset on…
Gallbladder disease risk with rapid weight loss Replied, post #37 · Clinical › Comorbidities · 29 Nov 2024 · 0 likes Post #35 put the caveat in the right place and I want to underline it. Taking gallbladder disease risk seriously for a moment rather than deflecting: the honest…
Asking about a compound your prescriber has not heard of — one year on Replied, post #5 · Clinical › Prescriber conversations · 18 Nov 2024 · 0 likes Where a decision rests on a guideline, asking which guideline is entirely reasonable and usually answered directly.
Journal club: SURMOUNT-1, read without the press release Replied, post #14 · Evidence › Journal club · 14 Nov 2024 · 12 likes No notes. Posting so the count is not one.
SURPASS-2 and the comparator dose question that will not go away Replied, post #55 · Compounds › Tirzepatide · 13 Nov 2024 · 0 likes The 2.5 mg starting dose is not a therapeutic dose in the sense that weight loss is minimal at that dose. It is a tolerance-testing dose. Confusing the purpose of a…
Food noise reducing and the disorientation that can follow Replied, post #32 · Wellbeing › Mental health · 1 Nov 2024 · 0 likes Picking up post #31: that is the part I would want checked first. An honest declaration on food noise: I have a prior here and it is strong enough that you should…
Request: a diff view for wiki revisions Replied, post #20 · Meta › Feature requests · 29 Oct 2024 · 24 likes Noted, and I have changed what I was going to do on the strength of it.
Revisiting: How to bring a laboratory report to an appointment usefully Replied, post #120 · Clinical › Bloodwork · 18 Oct 2024 · 12 likes The arithmetic in post #119 is right; the assumption feeding it is the part to check. Where a result is flagged by the laboratory, the flag is against their interval…
Second pass at: Hoarding and why it makes a shortage worse Replied, post #38 · Access › Shortages · 10 Oct 2024 · 7 likes Compounding during shortages: some jurisdictions allow pharmacy compounding when a marketed product is in shortage. That permission is jurisdiction-specific and…
Irish differences from the UK position Replied, post #22 · Regional › UK & Ireland · 5 Oct 2024 · 32 likes Nothing in this subcategory is medical or legal advice, and prescribers reading here consistently say so themselves.
Correlation in a self-tracked dataset: what it can support Replied, post #114 · Research Methods › Statistics · 24 Aug 2024 · 25 likes Speaking only to correlation as I have actually seen it, rather than as it is usually described: the effect is real, it is smaller than the thread suggests, and the…
Pen mechanics when the cartridge is nearly empty Replied, post #2 · Devices › Pens & autoinjectors · 9 Aug 2024 · 0 likes The opening post is the version of this I will quote in future. One addition. Pen confusion between compounds: if you are using multiple pens or alternating pens,…
Second pass at: Sodium, potassium and magnesium when intake drops Replied, post #26 · Nutrition & Training › Hydration & electrolytes · 5 Aug 2024 · 14 likes Adding the measurement that post #25 says would settle it. Sodium: losing weight involves losing some sodium. Electrolyte drinks or salty foods help maintain sodium…
Second pass at: Journal club: LEADER as the historical anchor Replied, post #66 · Evidence › Journal club · 26 Jul 2024 · 0 likes The arithmetic on LEADER is the easy part and it is where the errors are, which is an uncomfortable combination. Show your working and someone will catch it.
Splitting a weekly dose in two: the pharmacokinetic argument against — the long version Replied, post #146 · Practice › Dosing & titration · 11 Jul 2024 · 4 likes Worth separating Splitting a weekly dose as a question about the compound from Splitting a weekly dose as a question about the documentation. They get answered by…