y.adeyemi

TL2 · Bergen

Contributes reviews on supplier material. Based in Bergen.

Joined 22 November 2024 · last posted 4h

81 posts, newest first. Showing up to 150.

Reading order for a first week here, and what to skip until later — what changed since Replied, post #94 · Start Here › Welcome · 28 Jul 2026 · 10 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
Immortal time bias in a claims-database study — one year on Replied, post #26 · Evidence › Study critique · 16 Jul 2026 · 0 likes Whatever the answer on Immortal time bias turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, invite the…
Why retatrutide discussion here is more cautious than elsewhere — one year on Replied, post #64 · Compounds › Retatrutide · 15 Jul 2026 · 0 likes Right — I had this wrong and I am glad to have read it before it mattered.
Immortal time bias in a claims-database study — one year on Replied, post #9 · Evidence › Study critique · 5 Jul 2026 · 27 likes Worth stating the null on Immortal time bias before we explain it: the observation may be nothing. That possibility deserves a sentence and usually does not get one.
How shortages have affected compounding permissions Replied, post #17 · Access › Shortages · 5 Jul 2026 · 3 likes My understanding of shortages is a few years old and may have been superseded. If it has been, I would genuinely like to know rather than keep repeating it.
What a certificate commits its issuer to — one year on Replied, post #91 · Analytics › COA interpretation · 18 Jun 2026 · 3 likes Sensible. I would want the same detail before I acted on it either.
Why the absence of controlled human data on BPC-157 matters more than people admit Replied, post #41 · Compounds › Repair & healing peptides · 13 Jun 2026 · 0 likes Publication patterns in the BPC-157 literature: a large proportion of the evidence comes from one research group. That is not necessarily wrong — one group can do…
Why chargeback is not the safety net people assume Replied, post #18 · Sourcing › Payments · 9 Jun 2026 · 1 like Agreed on all of that, and I have nothing to add to it.
Micronutrient adequacy at low total intake Replied, post #19 · Nutrition & Training › Protein & intake · 7 Jun 2026 · 0 likes Right, and stated more narrowly than I would have dared to state it.
[2026 update] A vial that will not fully dissolve: what to check and in what order Replied, post #89 · Practice › Reconstitution · 4 Jun 2026 · 13 likes Confirming post #88 from a second method, which matters more than confirming it from a second person. Foaming during reconstitution: bubbles in the solution are usually…
Reading a trial's population section before its results Replied, post #84 · Evidence › Trials · 3 Jun 2026 · 5 likes Everything in post #81 holds. The case it does not cover is the one I have. Confounding in observational data: a third variable can explain an apparent association. In…
The anatomy of a question that gets answered within an hour Replied, post #60 · Start Here › How to Ask · 29 May 2026 · 2 likes Saving this. It is the version I will quote when the question comes round again.
Trust level 3 requirements: a clarification — does this still hold? Replied, post #51 · Meta › Announcements · 22 May 2026 · 10 likes Distinguishing three things in the Trust level 3 requirements discussion that keep getting used interchangeably: the observation, the proposed mechanism, and the…
Follow-up: I have no scientific background — can I still follow the analytics categories? Replied, post #11 · Start Here › Welcome · 28 Apr 2026 · 32 likes Same experience here, different supplier, so it is at least not unique to one of them.
Micro-titration: a disputed topic, argued properly Replied, post #65 · Practice › Dosing & titration · 25 Apr 2026 · 13 likes I had written a reply contradicting post #61 and deleted it. Here is what survived. Concentration and dose get conflated constantly in this subcategory. Changing how…
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are… Replied, post #78 · Practice › Storage & stability · 31 Mar 2026 · 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. I have changed my mind on this once…
When a dose reduction is the correct response to a side effect — a second dataset Replied, post #9 · Practice › Dosing & titration · 22 Mar 2026 · 28 likes Post #5 describes the usual case. This is about the unusual one. Splitting a weekly dose in two: the pharmacokinetic argument against is that you want the benefit of…
Bioimpedance and hydration: why the number moves Replied, post #20 · Outcomes › Body composition · 20 Mar 2026 · 0 likes Everything in post #18 holds. The case it does not cover is the one I have. Percentage body fat is a ratio, so it changes when either component changes. A rising…
Anaesthesia and elective surgery: the aspiration question Replied, post #45 · Practice › Interactions · 10 Mar 2026 · 1 like The arithmetic in post #43 is right; the assumption feeding it is the part to check. A supplement is a drug for interaction purposes, and the fact that it is sold…
The lowest dose that does anything: is that a real question? Replied, post #102 · Practice › Dosing & titration · 7 Mar 2026 · 4 likes Post #99 answers the question as asked. The question underneath it is different. Holding a dose indefinitely: the trials did not study indefinite holding at a…
Amylin receptor signalling and satiety — what changed since Replied, post #40 · Pharmacology › Receptor biology · 6 Mar 2026 · 29 likes Post #37 is the version of this I will quote in future. One addition. The area postrema sits outside the blood-brain barrier and is where a great deal of the nausea…
Measurement error in home scales, with a worked standard deviation Replied, post #9 · Research Methods › Statistics · 18 Feb 2026 · 15 likes A standard deviation describes the spread of individuals and a standard error describes the precision of the mean. Quoting one where the other belongs changes the…
The headache that turns out to be dehydration Replied, post #140 · Nutrition & Training › Hydration & electrolytes · 16 Jan 2026 · 31 likes Worth stating the null on headache before we explain it: the observation may be nothing. That possibility deserves a sentence and usually does not get one.
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #48 · Pharmacology › Pharmacokinetics · 29 Dec 2025 · 29 likes Reframing Half-life slightly, because I think the disagreement is about the question rather than the answer. If the question is "does it happen", yes. If it is "how…
Which panel is worth repeating and which is worth ignoring — a second dataset Replied, post #32 · Clinical › Bloodwork · 19 Dec 2025 · 0 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…
Heterogeneity as information rather than as a nuisance Replied, post #29 · Evidence › Meta-analyses · 17 Dec 2025 · 0 likes Double extraction with disagreement resolution is standard and is worth checking for, because single extraction errors are common and non-random.
What "marked as solution" means and who gets to mark it — does this still hold? Replied, post #20 · Start Here › Welcome · 13 Dec 2025 · 32 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
Second pass at: Circumference measurements as a poor man's composition estimate Replied, post #26 · Outcomes › Body composition · 13 Dec 2025 · 15 likes This follows post #23 rather than contradicting it. Maintenance phase: tracking body composition during maintenance (weight stable) is different from tracking during…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly — the long… Replied, post #47 · Compounds › Tirzepatide · 7 Dec 2025 · 25 likes Post #46 is right about the mechanism and I think understates the practical bit. Tirzepatide's half-life of roughly five days means steady state is approached in about…
[2026 update] What a good consultation looks like from the other side Replied, post #4 · Clinical › Prescriber conversations · 17 Nov 2025 · 0 likes Post #2 is the version of this I will quote in future. One addition. I have three months of notes on good consultation and the honest summary is that the trend is real…
Revisiting: Aggregates and why a purity assay may miss them entirely Replied, post #21 · Analytics › Impurities & related substances · 17 Nov 2025 · 12 likes Summarising the Aggregates thread so far, since it is long and the answer is buried: the first reply has the method, the fourth has the correction to it, and the rest…
The anatomy of a question that gets answered within an hour — the long version Replied, post #59 · Start Here › How to Ask · 4 Nov 2025 · 2 likes Nobody minds being asked to explain a term. The people who use them most are the quickest to define them, and a question that stops to ask is usually a question that…
Reused chromatograms across lots: how to spot it Replied, post #2 · Analytics › COA interpretation · 4 Nov 2025 · 27 likes The opening post put the caveat in the right place and I want to underline it. I would keep reused chromatograms across lots and the decision it usually gets used for…
Semaglutide versus liraglutide head to head: reading STEP 8 carefully Replied, post #82 · Compounds › Semaglutide · 26 Oct 2025 · 4 likes Answering the question post #80 raises rather than the one it answers. On identity confirmation: a mass close to 4113.6 Da on the intact molecule is consistent with…
Sleep quality changes during weight loss — what changed since Replied, post #36 · Wellbeing › Sleep · 23 Oct 2025 · 0 likes Sleep-disordered breathing improving with weight reduction is one of the better-evidenced downstream effects, and the trial that measured it used an objective index…
Thyroid function tests during substantial weight change Replied, post #102 · Clinical › Bloodwork · 20 Oct 2025 · 2 likes Reading rather than contributing, but this is the most useful thread I have found on it.
What a purity-only report leaves out Replied, post #37 · Sourcing › Independent verification · 6 Oct 2025 · 21 likes What I would want before treating purity-only as settled: the method, the sample, and whether anyone tried to find the opposite result. Two of the three are usually…
What the GIP component of tirzepatide is thought to contribute, and how confident we can… Replied, post #50 · Compounds › Tirzepatide · 6 Oct 2025 · 7 likes Agreed, and I will stop repeating the version of this I had been repeating.
Older adults, sarcopenia risk, and the trade-off nobody quantifies Replied, post #4 · Clinical › Special populations · 25 Sep 2025 · 0 likes The most useful thing anyone has posted about older adults in this category was a table of what had been measured and by whom. That is what I would want again.
Aggregated purity results across four services, with caveats — a second dataset Replied, post #129 · Data & Tools › Datasets · 11 Sep 2025 · 0 likes Sample size is not the only thing that determines what a dataset can support. Selection is usually the larger problem here and it does not improve with volume. Noting…
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #111 · Access › Insurance & coverage · 8 Sep 2025 · 20 likes Adding a small correction to the Reading a denial letter summary above rather than a disagreement with it. The substance holds; one of the figures is out by a factor…
Aggregated purity results across four services, with caveats — a second dataset Replied, post #36 · Data & Tools › Datasets · 7 Sep 2025 · 14 likes Everything in post #32 holds. The case it does not cover is the one I have. Where a value is derived rather than measured, mark it. Derived columns get treated as…
Hypertension improvement and when medication needs revisiting Replied, post #46 · Clinical › Comorbidities · 7 Sep 2025 · 5 likes Gastrointestinal conditions interact with a mechanism that slows gastric emptying in ways that are plausible and largely unstudied. I have kept the units in throughout,…
Tirzepatide molecular mass and the charge states you would expect on ESI Replied, post #22 · Compounds › Tirzepatide · 27 Aug 2025 · 0 likes Comparisons between the tirzepatide and semaglutide programmes across trials rather than within one are weak. Different populations, different durations, different…
Travel coolers and how long they really hold Replied, post #62 · Devices › Cold chain · 6 Aug 2025 · 11 likes Reading rather than answering, but this is the post I would point somebody at.
How to research a compound with no human data without deceiving yourself Replied, post #84 · Compounds › Other compounds · 3 Aug 2025 · 2 likes Post #80 and I disagree about the size of the effect, not about the direction. This subcategory exists because some people will research compounds outside the main…
Domestic fridge temperature mapping: a cheap experiment — what changed since Replied, post #154 · Devices › Cold chain · 1 Aug 2025 · 26 likes Temperature logging: devices that record temperature over time let you confirm cold chain was maintained. Useful if a shipment was delayed or if you are concerned about…
When a preprint is the best available evidence and we say so Replied, post #11 · Evidence › Preprints · 30 Jul 2025 · 7 likes I had read the opposite somewhere and cannot now find where, which tells me something.
[2026 update] What the GIP component of tirzepatide is thought to contribute, and how… Replied, post #85 · Compounds › Tirzepatide · 10 Jul 2025 · 8 likes Everything in post #81 holds. The case it does not cover is the one I have. Titration schedules for tirzepatide have more dose steps than semaglutide partly because the…
Antibiotics and a course of something with delayed emptying Replied, post #75 · Practice › Interactions · 26 Jun 2025 · 24 likes SGLT2 inhibitors: frequently co-administered and relevant to renal and cardiovascular discussion, not to interactions. There is no pharmacokinetic interaction of…
Coming back to: Official shortage notices and what they authorise Replied, post #35 · Access › Shortages · 20 Jun 2025 · 1 like Adding the measurement that post #32 says would settle it. What I want from this Official shortage notices thread is the list of things that would need to be true for…
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #129 · Compounds › Cagrilintide & amylin analogues · 18 Jun 2025 · 0 likes On storage: aggregation-prone peptides are the ones where repeated warming and cooling does the most damage, and where a solution that looks fine may already have…
Request: a diff view for wiki revisions — the long version Replied, post #10 · Meta › Feature requests · 17 Jun 2025 · 30 likes Grateful for the specificity. Vague answers to this question are what sent me looking.
Publishing an inconvenient result: a case study Replied, post #31 · Sourcing › Independent verification · 8 Jun 2025 · 3 likes That is consistent with mine, for whatever one more account is worth.
Coming back to: Oxidation and deamidation mass shifts, tabulated Replied, post #11 · Analytics › Mass spectrometry · 31 May 2025 · 24 likes The arithmetic in post #8 is right; the assumption feeding it is the part to check. Sample preparation for mass spectrometry can itself introduce modifications,…
A claim built entirely on a subgroup analysis Replied, post #64 · Evidence › Study critique · 30 May 2025 · 26 likes Post #61 is right about the mechanism and I think understates the practical bit. Genuine question rather than a rhetorical one: has anyone here actually observed claim…
Distinguishing a deletion sequence by mass alone — the long version Replied, post #23 · Analytics › Mass spectrometry · 28 May 2025 · 13 likes The arithmetic in post #20 is right; the assumption feeding it is the part to check. An acylated peptide has a mass that reflects the modification, so comparing against…
A report I filed that turned out to be wrong, and the correction Replied, post #45 · Sourcing › Vendor reports · 9 May 2025 · 31 likes The format we ask for is compound, lot, testing service, method as reported, result, and the certificate figure for the same lot. A report missing any of those goes to…
UK access routes, dated and sourced — a second dataset Replied, post #73 · Regional › UK & Ireland · 5 May 2025 · 28 likes Coming back to post #71, because the follow-up matters more than the original answer. Date the claim and say whether it is the United Kingdom or Ireland. They are…
DXA precision and the least significant change for lean mass — the long version Replied, post #6 · Outcomes › Body composition · 5 May 2025 · 0 likes DXA on the same machine with the same technician has a least significant change for lean mass of roughly a kilogram, sometimes more. Below that, two scans are the same…
What happens after your first post: likes, trust levels, and why none of it matters much Replied, post #17 · Start Here › Welcome · 31 Mar 2025 · 2 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
Validating a method you did not develop — does this still hold? Replied, post #67 · Analytics › Method validation · 3 Mar 2025 · 3 likes Post #65 and I disagree about the size of the effect, not about the direction. The distinction between a qualified instrument and a validated method is worth keeping.…
Reading an MS report that only gives you a single number Replied, post #17 · Analytics › Mass spectrometry · 25 Feb 2025 · 0 likes The honest summary of what a mass result buys you: it narrows the field of what the material could be, considerably. It never closes it, and no certificate should be…
Gallbladder disease risk with rapid weight loss Replied, post #58 · Clinical › Comorbidities · 16 Jan 2025 · 0 likes Adding the measurement that post #57 says would settle it. Gallbladder disease risk looks different depending on whether you are reading the primary literature or the…
[2026 update] New subcategory: rationale and scope Replied, post #150 · Meta › Announcements · 15 Jan 2025 · 20 likes Where I part company with post #148, and it is a narrow parting. Posting my New subcategory numbers with the method attached so they can be discounted properly.…
Specification in the result column: why that is a meaningful error — the long version Replied, post #4 · Analytics › COA interpretation · 23 Dec 2024 · 7 likes The opening post answers the question as asked. The question underneath it is different. What fields matter on a certificate: lot number matching the vial, test date,…
Reading a supplementary appendix and finding the interesting part Replied, post #50 · Evidence › Trials · 23 Dec 2024 · 5 likes Narrowing post #49, because the general version has more than one answer. Risk of bias: structured appraisal of internal validity. Key things to assess: randomisation…
Building a sensible monitoring schedule with your prescriber Replied, post #57 · Clinical › Bloodwork · 20 Dec 2024 · 0 likes The documentation on building a sensible monitoring schedule is better than this thread and I say that as someone who has posted in the thread.
Molecular mass of semaglutide and why the figure differs between sources — does this… Replied, post #33 · Compounds › Semaglutide · 20 Dec 2024 · 9 likes Post #31 put the caveat in the right place and I want to underline it. Semaglutide versus liraglutide in STEP 8: semaglutide produced greater weight reduction and the…
What we do not know about retatrutide, listed explicitly Replied, post #24 · Compounds › Retatrutide · 17 Dec 2024 · 0 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…
Checking someone else's arithmetic: a worked example thread Replied, post #7 · Practice › Reconstitution · 13 Dec 2024 · 18 likes Good question, well framed, and I would like to see it answered properly.
Follow-up: Where the four-week escalation interval comes from, and what it is not Replied, post #119 · Practice › Dosing & titration · 5 Dec 2024 · 0 likes Four-week escalation interval has a well-known answer and a correct answer, and the interesting work is establishing that they are the same. Nobody has done that here…
A vial that will not fully dissolve: what to check and in what order Replied, post #7 · Practice › Reconstitution · 3 Dec 2024 · 21 likes The best check on any reconstitution calculation is to do it twice by two different routes — mass per volume, then volume per dose — and see whether they agree. They…
Why we hide unevidenced fraud accusations and log the hiding Replied, post #16 · Sourcing › Red flags · 16 Nov 2024 · 32 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.
Reading a preclinical wound-healing model and its relevance to a human tendon Replied, post #55 · Compounds › Repair & healing peptides · 14 Nov 2024 · 22 likes I would be cautious about generalising from the reading a preclinical wound-healing model example above. It is a good example. It is one example.
Coming back to: Research-use-only labelling: what it means and what it does not Replied, post #25 · Sourcing › Regulatory · 10 Nov 2024 · 0 likes Post #24 describes the usual case. This is about the unusual one. Research-use-only material is not approved for human use anywhere. That is a statement about the…
Revisiting: Moderation log format change Replied, post #10 · Meta › Announcements · 29 Oct 2024 · 23 likes Worth separating Moderation log format change as a question about the compound from Moderation log format change as a question about the documentation. They get…
Follow-up: Oral contraceptives and delayed emptying: what the data shows Replied, post #20 · Practice › Interactions · 17 Oct 2024 · 0 likes Helpful, and short, which on this subject is harder than long.
Criticising the method without criticising the authors Replied, post #11 · Evidence › Study critique · 16 Oct 2024 · 0 likes Post #9 answers the question as asked. The question underneath it is different. Answering the criticising the method without criticising question as asked, then the…
Splitting a vial for two laboratories: how to do it without ruining both — what changed… Replied, post #116 · Sourcing › Independent verification · 7 Oct 2024 · 4 likes Everything in post #114 holds. The case it does not cover is the one I have. It does not extend to lots nobody has seen, it is not a recommendation, and it says nothing…
The C-cell question: rodent findings and their human context — what changed since Replied, post #40 · Compounds › Semaglutide · 7 Sep 2024 · 0 likes Where I part company with post #36, and it is a narrow parting. The practical version of c-cell question is three sentences long. The rigorous version is three pages…