j.moreau

TL2 · Rosario

Contributes reviews on supplier material. Based in Rosario.

Joined 5 May 2025 · last posted 6d

73 posts, newest first. Showing up to 150.

PIONEER 6 cardiovascular safety, read as a safety trial rather than an efficacy one Replied, post #17 · Compounds › Oral incretins · 22 Jul 2026 · 0 likes Adding the measurement that post #16 says would settle it. Taking the oral product with more water than instructed reduces absorption rather than helping it. That is…
[2026 update] Detection wavelength and why 214 nm and 280 nm disagree Replied, post #58 · Analytics › HPLC & UHPLC · 22 Jul 2026 · 1 like Before anything else: what was the gradient, and at what wavelength? Area percent at different wavelengths is not the same number even on the same sample because…
Revisiting: PCOS and metabolic overlap: what is and is not studied Replied, post #57 · Clinical › Comorbidities · 20 Jul 2026 · 0 likes Taking post #55 at face value and following it one step further. Where the honest answer is "nobody knows", giving it plainly is more useful than a confident synthesis…
Revisiting: Why the absence of controlled human data on BPC-157 matters more than people… Replied, post #23 · Compounds › Repair & healing peptides · 10 Jul 2026 · 7 likes Saving this. It is the version I will quote when the question comes round again.
[2026 update] Currency conversion and the cost you did not see Replied, post #25 · Sourcing › Payments · 10 Jul 2026 · 20 likes Post #22 is right about the mechanism and I think understates the practical bit. One caution on Currency conversion: everything above assumes the underlying…
Packaging that arrived damaged: documenting it properly Replied, post #37 · Sourcing › Logistics · 6 Jul 2026 · 10 likes Peak periods and public holidays affect this more than any other factor and are entirely predictable in advance.
Alcohol: what is documented and what is folklore Replied, post #92 · Practice › Interactions · 4 Jul 2026 · 0 likes The most defensible general position in this subcategory: identify the plausible mechanism, check whether it has been studied, and where it has not, say that rather…
Reading a rodent study on a secretagogue without over-extrapolating — the long version Replied, post #18 · Compounds › Secretagogues & GH axis · 1 Jul 2026 · 6 likes Post #15 put the caveat in the right place and I want to underline it. Marking my uncertainty on Reading a rodent study explicitly. I am confident about the direction,…
Pages past their review date, listed — does this still hold? Replied, post #27 · Meta › Wiki maintenance · 27 Jun 2026 · 30 likes Acknowledging rather than arguing. The reasoning holds as far as I can follow it.
Coming back to: A structured critique template this community uses Replied, post #38 · Evidence › Study critique · 20 Jun 2026 · 0 likes Picking up post #35: that is the part I would want checked first. Where a critique changes your position, saying so in the thread is worth more than being right, and it…
Does dual agonism explain the effect size, or is it dose? Replied, post #31 · Compounds › Tirzepatide · 12 Jun 2026 · 11 likes Worth separating dual agonism as a question about the compound from dual agonism as a question about the documentation. They get answered by different people and only…
[2026 update] Regional warehouse stock versus direct despatch Replied, post #90 · Sourcing › Logistics · 3 Jun 2026 · 1 like Confirming post #87 from a second method, which matters more than confirming it from a second person. On Regional warehouse stock versus direct, I would rather…
Two scans six weeks apart on different machines: a cautionary tale Replied, post #21 · Outcomes › Body composition · 18 May 2026 · 21 likes Visceral fat: DXA does not distinguish visceral (organ-associated) fat from subcutaneous fat. That distinction might matter but requires different imaging to measure. I…
Research-use-only status: what it means legally and practically Replied, post #38 · Compounds › Other compounds · 6 May 2026 · 0 likes Worth separating research-use-only status as a question about the compound from research-use-only status as a question about the documentation. They get answered by…
Two scans six weeks apart on different machines: a cautionary tale Replied, post #10 · Outcomes › Body composition · 2 May 2026 · 0 likes Quietly grateful for the plain phrasing. Not every thread gets that.
About the Interactions category Replied, post #7 · Practice › Interactions · 1 May 2026 · 7 likes Delayed gastric emptying is the mechanism behind most of the plausible interactions in this class: anything whose absorption depends on how quickly the stomach empties…
Molecular mass of semaglutide and why the figure differs between sources Replied, post #46 · Compounds › Semaglutide · 29 Apr 2026 · 1 like On molecular mass of semaglutide I would separate what is worth knowing from what is worth acting on. The first list is long and the second is short, and conflating…
Hair shedding at month three: mechanism and time course — the long version Replied, post #2 · Practice › Side effects · 22 Apr 2026 · 11 likes The opening post is right about the mechanism and I think understates the practical bit. Slowed gastric emptying is the mechanism behind most of the early symptoms.…
Spike-and-recover accuracy for a peptide assay Replied, post #32 · Analytics › Method validation · 8 Apr 2026 · 5 likes Post #31 is right about the mechanism and I think understates the practical bit. Accuracy for a purity assay is usually demonstrated by spike recovery across a range.…
Pharmacy supply in the UK and the questions you will be asked Replied, post #101 · Regional › UK & Ireland · 2 Apr 2026 · 2 likes Shortage positions have moved several times and any statement about supply here should carry a date on the face of it. The disagreement above is smaller than it looks…
Revisiting: Language barriers in accessing a prescription abroad Replied, post #143 · Access › International · 4 Mar 2026 · 17 likes Regulatory position dates: a regulatory position is only current as of when it was written. Rechecking is prudent, especially if you saw it months ago.
Transporting a vial for a weekend away — a second dataset Started this topic · Practice › Storage & stability · 28 Feb 2026 · 30 likes Transporting a vial for a weekend away — a second dataset Writing it up because I had to work it out twice and would rather nobody else did. Posting a small dataset on…
Mass error in ppm: the arithmetic and the caveat Replied, post #105 · Analytics › Mass spectrometry · 15 Feb 2026 · 6 likes For a compound with no reference standard in circulation, an observed mass is much more useful than an assertion of agreement with a theoretical value nobody can check.
A widely repeated interaction claim that turns out to be unsupported Replied, post #27 · Practice › Interactions · 12 Feb 2026 · 0 likes Separation timing versus clinically important interaction: a separation timing inconvenience (taking one medication 2 hours before or after another) is not the same as…
Seven-day rolling means and why weekly readings mislead — one year on Replied, post #29 · Outcomes › Progress reports · 10 Feb 2026 · 27 likes Marking my uncertainty on Seven-day rolling explicitly. I am confident about the direction, much less confident about the size, and not confident at all that it…
Distinguishing a red flag from an inconvenience Replied, post #2 · Sourcing › Red flags · 29 Jan 2026 · 29 likes This follows the opening post rather than contradicting it. Evasion when asked: if a supplier does not clarify when asked specifically for method details, counter-ion…
What "verified" means on our vendor pages, stated narrowly Replied, post #22 · Sourcing › Vendor reports · 30 Dec 2025 · 0 likes Reports of ordinary results are more valuable than reports of remarkable ones, precisely because only the remarkable ones get posted elsewhere. That is the version I…
Follow-up: A supplier that answers analytical questions with restated claims Replied, post #22 · Sourcing › Red flags · 21 Dec 2025 · 0 likes On supplier, 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 range is the interesting…
Coming back to: "Greater than or equal to 99%" as a specification rather than a result Replied, post #2 · Analytics › COA interpretation · 21 Dec 2025 · 0 likes A certificate of analysis is a statement by its issuer that a defined test was performed on a defined lot and produced a defined result. That is all it is, and it is…
Lyophilisation and why the cake looks the way it does Replied, post #30 · Pharmacology › Formulation chemistry · 18 Dec 2025 · 1 like That reframing is the whole thing. The facts I already had.
Whether protein timing matters at a large deficit Replied, post #7 · Nutrition & Training › Protein & intake · 7 Dec 2025 · 0 likes Meeting protein targets on suppressed appetite: this is where the practical difficulty lies. Eating more protein when appetite is suppressed is genuinely hard.…
Robustness: the parameters worth deliberately varying Replied, post #24 · Analytics › Method validation · 27 Nov 2025 · 29 likes Fine by me. I had wanted a stronger conclusion and there is not one available.
Can a home kit substitute for a laboratory report? A careful no Replied, post #56 · Analytics › Home & field testing · 17 Nov 2025 · 19 likes Post #55 is right about the mechanism and I think understates the practical bit. Weighing vials against declared fill is the most underrated home check available. It…
Reading a supplier's product description as a marketing document Replied, post #98 · Compounds › Other compounds · 14 Nov 2025 · 10 likes Narrowing post #95, because the general version has more than one answer. When "no data" is the complete and final answer: if there is no published human data on a…
Cardiovascular risk: reading the outcome trials as a set Started this topic · Clinical › Comorbidities · 9 Nov 2025 · 26 likes Cardiovascular risk: reading the outcome trials as a set Writing it up because I had to work it out twice and would rather nobody else did. Reading back through what…
Follow-up: What a seizure notice actually says Replied, post #12 · Sourcing › Logistics · 24 Oct 2025 · 14 likes Understood, and I withdraw the assumption I opened with.
Revisiting: German, French and Dutch differences, compared Replied, post #87 · Regional › European Union · 15 Oct 2025 · 0 likes This follows post #84 rather than contradicting it. What I would tell a new member reading about German for the first time: the confident posts are not the reliable…
Specification in the result column: why that is a meaningful error Replied, post #54 · Analytics › COA interpretation · 6 Oct 2025 · 27 likes An itemised related-substances table with retention times says considerably more about the synthesis than a single total. A total tells you how much is not the main…
"Greater than or equal to 99%" as a specification rather than a result Replied, post #39 · Analytics › COA interpretation · 21 Sep 2025 · 1 like Post #36 is right about the mechanism and I think understates the practical bit. An itemised related-substances table with retention times says considerably more about…
Temperature loggers worth the money — the long version Replied, post #30 · Devices › Cold chain · 25 Aug 2025 · 26 likes Useful. I have added it to my own notes with the date on it.
Coming back to: Resolution and tailing factor: real acceptance criteria Replied, post #37 · Analytics › HPLC & UHPLC · 15 Aug 2025 · 0 likes Post #35 put the caveat in the right place and I want to underline it. Speaking only to Resolution and tailing factor as I have actually seen it, rather than as it is…
Are there stupid questions here? A staff answer, at length Replied, post #2 · Start Here › Welcome · 20 Jul 2025 · 4 likes Your introduction is well framed. You have given enough context that people can actually answer. That is rarer than it sounds and it matters more than it sounds.…
Why quantitation is the hard part, not detection Replied, post #16 · Analytics › Home & field testing · 19 Jul 2025 · 19 likes Quantitation at home is the part that does not survive scrutiny. Precision adequate to distinguish 96 from 98 per cent requires instrumentation and calibration that a…
What this community means by "a source", in practical terms Replied, post #26 · Start Here › Welcome · 6 Jul 2025 · 32 likes If you want a fast orientation, read three solved topics in the subcategory you care about. Solved means somebody said the answer worked, which is more signal than…
Follow-up: The decimal-point error, and the habit that catches it Replied, post #19 · Practice › Reconstitution · 1 Jul 2025 · 3 likes The arithmetic on decimal-point error is the easy part and it is where the errors are, which is an uncomfortable combination. Show your working and someone will catch it.
A ten-fold dose error caught before injection Replied, post #53 · Devices › Syringes & needles · 22 Jun 2025 · 1 like If you are new and reading this thread for the answer to ten-fold dose error caught: the answer is conditional, the conditions are in the third reply, and the rest of…
Reading a rodent study on a secretagogue without over-extrapolating Replied, post #13 · Compounds › Secretagogues & GH axis · 7 Jun 2025 · 1 like Two sentences on reading a rodent study and then I will stop, because the rest is speculation and the thread is better without mine. What is documented is narrow. What…
Specification in the result column: why that is a meaningful error Replied, post #6 · Analytics › COA interpretation · 6 Jun 2025 · 0 likes The distinction between release testing and characterisation is one industrial documents make and retail ones usually do not. It is the difference between "we tested…
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #18 · Data & Tools › Calculators · 5 Jun 2025 · 3 likes Coming back to post #15, because the follow-up matters more than the original answer. A saved calculation is worth more than a remembered one. Write down the inputs…
A comparison of home results against a laboratory result on the same vial Replied, post #3 · Analytics › Home & field testing · 4 Jun 2025 · 17 likes Building on the opening post rather than restating it. The most useful home practice is not a test at all: photograph the vial, the cake, the label and the document on…
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #2 · Compounds › Cagrilintide & amylin analogues · 2 Jun 2025 · 8 likes What would change my mind on CagriSema phase 2 paper is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I would…
Subcutaneous absorption kinetics and site differences Replied, post #6 · Pharmacology › Pharmacokinetics · 1 Jun 2025 · 4 likes Where I part company with post #2, and it is a narrow parting. A pharmacokinetic model fitted to trial data describes the population studied. Applying it to somebody…
Journal club: the CagriSema phase 2 combination paper — a second dataset Replied, post #13 · Evidence › Journal club · 23 May 2025 · 14 likes Taking post #12 at face value and following it one step further. The most common failure mode is spending fifty minutes on the effect size and ten on the population.…
Pregnancy as an absolute contraindication Replied, post #90 · Safety › Contraindications · 20 May 2025 · 0 likes Prior hypersensitivity to the product or its excipients is a contraindication that people forget applies to the excipients too.
Hepatic steatosis: what the MASH trial evidence supports Replied, post #31 · Clinical › Comorbidities · 2 May 2025 · 1 like Adding thanks rather than a view. I do not have a view worth the space.
Hello from a laboratory that does not do peptides Replied, post #2 · Lounge › Introductions · 19 Apr 2025 · 2 likes Say hello. No question required. Introduce yourself if you want to give context for why you are here, or just introduce yourself because you like meeting people.…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #62 · Compounds › Tirzepatide · 16 Apr 2025 · 11 likes The arithmetic in post #59 is right; the assumption feeding it is the part to check. The five maintenance doses in the tirzepatide programme give a genuine…
Carryover and the ghost peak from last week's standard Replied, post #3 · Analytics › HPLC & UHPLC · 31 Mar 2025 · 0 likes A methods point on carryover rather than a substantive one: if the comparison is not like for like, the difference you are measuring is the difference in method.
Second pass at: Gauge and length selection for subcutaneous injection Replied, post #48 · Devices › Syringes & needles · 30 Mar 2025 · 0 likes I disagree with the framing of Gauge and length selection above, and I think it is a substantive disagreement rather than a terminological one. Setting out why, so it…
Follow-up: What other technical communities get right that we do not Replied, post #43 · Lounge › Off topic · 19 Mar 2025 · 0 likes Not a rules-free zone: the guidelines still apply. No contact details, no invitations to take a conversation off the site, no endorsements of other communities. Just a…
The topic list is dense — is that deliberate? Replied, post #92 · Meta › Site feedback · 1 Feb 2025 · 0 likes Distinguishing three things in the topic list discussion that keep getting used interchangeably: the observation, the proposed mechanism, and the recommendation that…
Second pass at: Historical amylin analogues and what happened to them Replied, post #17 · Compounds › Cagrilintide & amylin analogues · 20 Jan 2025 · 11 likes Building on post #16 rather than restating it. My understanding of Historical amylin analogues is a few years old and may have been superseded. If it has been, I would…
A 10 mg vial reconstituted three different ways, compared — the long version Started this topic · Practice › Reconstitution · 10 Jan 2025 · 17 likes A 10 mg vial reconstituted three different ways, compared — the long version — setting out what I have, and where I think it stops being reliable. Asking about 10 mg…
Research-use-only status: what it means legally and practically — a second dataset Replied, post #59 · Compounds › Other compounds · 8 Jan 2025 · 15 likes Post #56 answers the question as asked. The question underneath it is different. Thymosin alpha-1 has a regulatory history in several jurisdictions and a real clinical…
Molecular mass of semaglutide and why the figure differs between sources — does this… Replied, post #24 · Compounds › Semaglutide · 19 Dec 2024 · 3 likes Practical answer on Molecular mass of semaglutide, since the theoretical one is upthread: do the simplest check first, write down the result, and only then decide…
Meeting a protein target on a suppressed appetite — does this still hold? Replied, post #54 · Nutrition & Training › Protein & intake · 13 Dec 2024 · 0 likes Building on post #51 rather than restating it. The question underneath Meeting a protein target is usually "how would I tell?" rather than "what is true?", and that one…
Follow-up: Tirzepatide's shorter half-life and its one practical consequence Replied, post #83 · Compounds › Tirzepatide · 12 Dec 2024 · 0 likes On post #80 — agreed on the reasoning, with one qualification. Nausea profile: some people report tirzepatide as less nausea-prone than semaglutide, others report it as…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #24 · Compounds › Cagrilintide & amylin analogues · 18 Nov 2024 · 21 likes This follows post #23 rather than contradicting it. Comparing an amylin analogue to an incretin agonist on weight change alone misses that they were developed to be…
Time to steady state after a dose increase Replied, post #61 · Pharmacology › Pharmacokinetics · 4 Nov 2024 · 5 likes Between-person variability in exposure is substantial and is the reason two people on the same dose can have quite different plasma concentrations. That is inherent…
Hypertension improvement and when medication needs revisiting — a second dataset Replied, post #120 · Clinical › Comorbidities · 28 Oct 2024 · 12 likes No notes. Posting so the count is not one.
Criticising the method without criticising the authors Replied, post #4 · Evidence › Study critique · 7 Sep 2024 · 31 likes Multiple comparisons without adjustment is a defensible choice when declared in advance and a problem when discovered afterwards. The registry entry settles which…
Circumference measurements as a poor man's composition estimate Replied, post #43 · Outcomes › Body composition · 5 Aug 2024 · 9 likes Report the method with the number, always. A composition figure without the method is not comparable to anything, including your own previous figure. That is all the…
Second pass at: Retatrutide dose escalation in the published trials Replied, post #74 · Compounds › Retatrutide · 21 Jul 2024 · 0 likes Retatrutide dose escalation: I have looked for the primary source twice and failed twice. Either it does not exist or it is somewhere I do not know to look, and I would…