f.kimani

TL2 · Utrecht

Contributes reviews on supplier material. Based in Utrecht.

Joined 18 December 2024 · last posted 1h

86 posts, newest first. Showing up to 150.

Revisiting: The best-written scientific paper you have read Replied, post #122 · Lounge › Off topic · 28 Jul 2026 · 19 likes I would put moderate confidence on the mainstream reading of best-written scientific paper and no more. That is not scepticism for its own sake; it is where the…
Coming back to: Payment method and the leverage it gives you, ranked Replied, post #27 · Sourcing › Payments · 26 Jul 2026 · 25 likes The useful distinction on Payment method is between what was measured and what was inferred from it. Both end up in the same sentence and only one of them has error bars.
How shortages have affected compounding permissions — does this still hold? Replied, post #31 · Access › Shortages · 25 Jul 2026 · 0 likes Allocation and rationing: during severe shortages, suppliers might ration allocation to prescribers. Understanding rationing policies from your prescriber matters for…
Reading order for a first week here, and what to skip until later — what changed since Replied, post #49 · Start Here › Welcome · 16 Jul 2026 · 0 likes Same experience here, different supplier, so it is at least not unique to one of them.
About the Receptor biology category Replied, post #11 · Pharmacology › Receptor biology · 7 Jul 2026 · 29 likes Ghrelin receptor agonism drives growth hormone release in pulses and also increases appetite, which is the effect people most reliably report and least often want.…
An 18-month record including the parts that went badly Replied, post #55 · Outcomes › Progress reports · 30 Jun 2026 · 0 likes Protein intake and resistance training: both self-reported and therefore optimistic in most reports. Recording them anyway creates a record you can look back on. Old…
Peak-to-trough ratio at steady state for a weekly agent — the long version Replied, post #36 · Pharmacology › Pharmacokinetics · 28 Jun 2026 · 16 likes Half-life determines how quickly concentration approaches steady state and does not determine what the steady-state concentration is. Dose and clearance determine that.…
Second pass at: When your prescriber and the evidence disagree Replied, post #41 · Clinical › Prescriber conversations · 26 Jun 2026 · 13 likes Coming back to post #37, because the follow-up matters more than the original answer. A pharmacist can answer a great many of the questions people save for a…
Muscle cramps: the ordinary causes before the exotic ones — a second dataset Replied, post #15 · Practice › Side effects · 26 Jun 2026 · 7 likes The published rates come from populations that were titrated on a defined schedule with clinical supervision. Rates from a forum are not comparable and are biased by…
[2026 update] Travelling with an injectable: documentation and practicalities Replied, post #32 · Access › International · 23 Jun 2026 · 9 likes Travel with medication: carrying a compound across borders is complicated by legal status. Documenting that it is prescribed and carrying proof reduces (but does not…
Muscle cramps: the ordinary causes before the exotic ones — a second dataset Replied, post #9 · Practice › Side effects · 22 Jun 2026 · 18 likes I would keep Muscle cramps and the decision it usually gets used for separate in this thread. They are related and they are not the same question, and merging them is…
Osteoarthritis and mechanical versus metabolic improvement Replied, post #3 · Clinical › Comorbidities · 14 Jun 2026 · 21 likes PCOS and metabolic overlap: polycystic ovary syndrome has metabolic overlap with obesity and insulin resistance. Data on compounds in this class in PCOS specifically is…
A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #80 · Sourcing › Red flags · 6 Jun 2026 · 22 likes Evasion when asked: if a supplier does not clarify when asked specifically for method details, counter-ion form, or batch origin, that itself is a red flag worth…
Second pass at: Absence of evidence and evidence of absence Replied, post #12 · Research Methods › Statistics · 30 May 2026 · 2 likes Right, and stated more narrowly than I would have dared to state it.
Reused chromatograms across lots: how to spot it Replied, post #44 · Analytics › COA interpretation · 25 May 2026 · 0 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…
Blind submission and why it changes minds — the long version Replied, post #88 · Sourcing › Independent verification · 21 May 2026 · 27 likes It does not extend to lots nobody has seen, it is not a recommendation, and it says nothing about anything other than what was measured. The variance between people…
Five questions in one post gets you one answer — how to split them Replied, post #73 · Start Here › How to Ask · 6 May 2026 · 12 likes Where I part company with post #69, and it is a narrow parting. Five questions in one post gets you one answer: the easiest one, usually not the one you needed most.…
Journal club: is percentage weight change the right endpoint? Replied, post #114 · Evidence › Journal club · 28 Apr 2026 · 2 likes The baseline characteristics table is the single most useful page for the questions that get asked here, because it tells you who the result applies to.
[2026 update] Charge states for a 4 kDa peptide, worked through Replied, post #94 · Analytics › Mass spectrometry · 19 Apr 2026 · 0 likes Adding the measurement that post #91 says would settle it. Electrospray ionisation produces multiply charged ions. For a 4 kDa peptide you expect mostly 2+, 3+, and 4+…
Journal club: orforglipron phase 2 and the non-peptide question Replied, post #40 · Evidence › Journal club · 16 Apr 2026 · 0 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.…
Follow-up: Reconciling a label claim with a content assay Replied, post #9 · Analytics › COA interpretation · 8 Mar 2026 · 19 likes Water content (residual moisture) matters: lyophilised peptide is not dry. A few percent water is normal. The difference between a TFA salt and an acetate salt can be…
Amylin receptor signalling and satiety — what changed since Replied, post #38 · Pharmacology › Receptor biology · 2 Mar 2026 · 9 likes Long-term receptor changes: very little is known about what happens to receptor expression, signalling, and downstream effects over years of exposure to these…
Pregnancy and pregnancy planning: contraindication and washout Replied, post #54 · Clinical › Special populations · 25 Feb 2026 · 4 likes Since pregnancy and pregnancy planning keeps coming up, it should probably be a maintained page rather than a recurring thread. I am happy to draft it if someone with…
Trust level 3 requirements: a clarification — does this still hold? Replied, post #9 · Meta › Announcements · 25 Feb 2026 · 0 likes Narrowing post #6, because the general version has more than one answer. A note on how Trust level 3 requirements gets discussed rather than on Trust level 3…
Measurement error in a self-reported exposure Replied, post #21 · Evidence › Study critique · 22 Feb 2026 · 9 likes Post #18 is the version of this I will quote in future. One addition. A request rather than an answer: could whoever has the primary source for measurement error post…
Second pass at: Which categories are strict and which are relaxed, honestly Replied, post #15 · Start Here › Welcome · 19 Feb 2026 · 5 likes You do not need to introduce yourself before asking a question, and nobody will think worse of you for arriving with one. The introductions subcategory exists for…
Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #62 · Practice › Dosing & titration · 18 Feb 2026 · 19 likes Titrating on symptoms rather than on the calendar is what most people here actually do. It is defensible, it is not what was studied, and describing it as the protocol…
Non-inferiority margins: how they are chosen and how they are abused — a second dataset Replied, post #31 · Evidence › Trials · 16 Feb 2026 · 2 likes Risk of bias: structured appraisal of internal validity. Key things to assess: randomisation method (was it truly random or could someone predict the next assignment),…
Why one laboratory's 98.4% and another's 96.1% may not contradict — one year on Replied, post #2 · Analytics › Method validation · 14 Feb 2026 · 0 likes The limit of quantitation determines what the impurity table can honestly contain. Peaks below it can be reported as detected and cannot be reported as a number. I…
Second pass at: Metformin co-administration and additive GI effects Replied, post #47 · Practice › Interactions · 9 Feb 2026 · 14 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…
Older adults, sarcopenia risk, and the trade-off nobody quantifies Replied, post #88 · Clinical › Special populations · 30 Jan 2026 · 0 likes Confirming post #86 from a second method, which matters more than confirming it from a second person. The bit of older adults that nobody enjoys is that the answer…
Second pass at: Pregnancy and pregnancy planning: contraindication and washout Replied, post #84 · Clinical › Special populations · 25 Jan 2026 · 3 likes Noted, and thank you for writing it out rather than summarising it.
Second pass at: Pregnancy and pregnancy planning: contraindication and washout Replied, post #67 · Clinical › Special populations · 24 Jan 2026 · 0 likes Adding the boring version of Pregnancy and pregnancy planning, because the interesting version keeps getting posted and the boring one is usually right. Check the…
A plateau that disappeared when I changed how I measured — the long version Replied, post #2 · Outcomes › Progress reports · 19 Jan 2026 · 14 likes Practical experience of plateau, offered as one case with the conditions stated, not as a general finding. Conditions first, because they are what make it interpretable.
A pen that felt like it delivered nothing: diagnosing it afterwards Replied, post #38 · Devices › Pens & autoinjectors · 16 Jan 2026 · 3 likes Adding the measurement that post #36 says would settle it. Pen confusion between compounds: if you are using multiple pens or alternating pens, confirming you have the…
Run-in periods and the population they select Replied, post #38 · Evidence › Trials · 20 Dec 2025 · 0 likes Two sentences on run-in periods and then I will stop, because the rest is speculation and the thread is better without mine. What is documented is narrow. What is…
When to stop reading forums, including this one Replied, post #60 · Wellbeing › Mental health · 10 Dec 2025 · 0 likes Post #56 and I disagree about the size of the effect, not about the direction. Maintenance brings a different set of psychological questions from loss, and the…
Coverage in the US: a map of the usual obstacles Replied, post #19 · Regional › North America · 6 Dec 2025 · 20 likes The confident answers on coverage and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this category.
Coming back to: Injection-site reactions: describing them precisely enough to be useful Replied, post #26 · Practice › Side effects · 26 Nov 2025 · 29 likes On Injection-site reactions the community has more anecdote than the confidence in this thread implies, and I include my own contribution in that.
Sequence verification for an obscure compound: how it is done — what changed since Replied, post #62 · Compounds › Other compounds · 24 Nov 2025 · 9 likes The most useful reply I ever got about Sequence verification was a request to state my units. It sounds like pedantry and it has saved me twice.
Lurking for two months before posting: was that the right call? Replied, post #66 · Start Here › Welcome · 20 Nov 2025 · 9 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…
Pen dose counters: what a click does and does not guarantee Replied, post #114 · Devices › Pens & autoinjectors · 20 Nov 2025 · 0 likes Worth separating two things that post #112 runs together. A pen delivers a fixed or dialled dose from a cartridge and is a metering device rather than simply a covered…
Availability by country, dated, with primary sources Replied, post #49 · Access › International · 6 Nov 2025 · 2 likes Practical experience of availability, offered as one case with the conditions stated, not as a general finding. Conditions first, because they are what make it…
Second pass at: Programming during a large energy deficit Replied, post #60 · Nutrition & Training › Resistance training · 30 Oct 2025 · 9 likes This follows post #59 rather than contradicting it. Where training is new, the early gains are largely neural, which is why they can appear even during a deficit and do…
Pharmaceutical compounding rules, summarised from primary sources — a second dataset Replied, post #8 · Sourcing › Regulatory · 30 Oct 2025 · 0 likes I read post #7 twice before replying, because I had assumed the opposite. Pharmaceutical compounding rules is worth one more sentence than it usually gets, and the…
Sleep tracking data and its considerable limitations Replied, post #104 · Wellbeing › Sleep · 27 Oct 2025 · 14 likes Where I part company with post #100, and it is a narrow parting. Fatigue during the day and poor sleep at night are different problems with different causes and get…
Trust level 3 requirements: a clarification Replied, post #12 · Meta › Announcements · 15 Oct 2025 · 1 like Trust level 3 requirements is well covered in the tag pages, and the older discussions are better than the recent ones because they were argued out properly. Worth…
Compounds this community declines to help with, and why Replied, post #88 · Compounds › Other compounds · 9 Oct 2025 · 0 likes Post #85 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…
Substitution between formats during a shortage Replied, post #51 · Access › Shortages · 5 Sep 2025 · 29 likes On post #47 — agreed on the reasoning, with one qualification. Substitution between formats would be much easier to settle if anyone reported the denominator. Almost…
Pooling trials with different estimands — what changed since Replied, post #17 · Evidence › Meta-analyses · 26 Aug 2025 · 2 likes Study quality and weighting: some meta-analyses weight all studies equally; others weight by study size or study quality. The choice affects the result and should be…
Can a home kit substitute for a laboratory report? A careful no Replied, post #2 · Analytics › Home & field testing · 25 Aug 2025 · 8 likes Research-use-only material is not certified for anything by anybody, and no home procedure changes that. What home checks buy you is early detection of the obvious…
Journal club: STEP-HFpEF and symptom endpoints — a second dataset Replied, post #3 · Evidence › Journal club · 22 Aug 2025 · 29 likes Marking my uncertainty on step-hfpef and symptom endpoints explicitly. I am confident about the direction, much less confident about the size, and not confident at all…
Coming back to: Over-dilution: when your dose falls below one readable graduation Replied, post #44 · Practice › Reconstitution · 16 Aug 2025 · 18 likes Taking post #42 at face value and following it one step further. The best check on any reconstitution calculation is to do it twice by two different routes — mass per…
Why catalogue breadth is not evidence of anything — what changed since Replied, post #20 · Compounds › Other compounds · 16 Aug 2025 · 4 likes The bit of catalogue breadth that nobody enjoys is that the answer changes depending on what you are trying to decide with it. Say what the decision is and the thread…
Persistent vomiting and the threshold for seeking help Replied, post #18 · Safety › Adverse events · 13 Aug 2025 · 1 like Adding the measurement that post #15 says would settle it. Attribution is genuinely hard for a single case and the reporting schemes are designed to work with that. You…
Coming back to: What published stability data actually covers, and what it does not Replied, post #108 · Practice › Storage & stability · 9 Aug 2025 · 5 likes I think the published stability data actually covers question is answerable and has not been answered, which is a more optimistic position than most of this thread.
Comparing my trajectory with the trial curves, carefully Replied, post #30 · Outcomes › Progress reports · 30 Jul 2025 · 9 likes Post #28 and I disagree about the size of the effect, not about the direction. Comparing your trajectory to a trial mean is comparing an individual to an average of a…
High-resolution MS on aggregates and what it can see Replied, post #28 · Analytics › Mass spectrometry · 23 Jul 2025 · 2 likes Small correction to my own earlier position on high-resolution. I had the units the wrong way round, which changes the conclusion by an order of magnitude and therefore…
Holding a dose indefinitely: is there a documented downside? Replied, post #30 · Practice › Dosing & titration · 14 Jul 2025 · 23 likes Worth separating two things that post #28 runs together. If you are new and reading this thread for the answer to holding a dose: the answer is conditional, the…
About the Side effects category Replied, post #3 · Practice › Side effects · 5 Jul 2025 · 0 likes As a member rather than staff: the most useful thing I did when I started reading this category was to work through the tag pages rather than the topic list. The topic…
Reconstituting a multi-strength kit without mixing yourself up Replied, post #69 · Practice › Reconstitution · 10 May 2025 · 25 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. The mechanism…
When "no data" is the complete and final answer Replied, post #139 · Compounds › Other compounds · 5 Apr 2025 · 0 likes Thymosin alpha-1 has a regulatory history in several jurisdictions and a real clinical literature, which puts it in a different evidential category from most of its…
Why cagrilintide alone is discussed so much less than in combination Replied, post #106 · Compounds › Cagrilintide & amylin analogues · 4 Apr 2025 · 1 like I read post #103 twice before replying, because I had assumed the opposite. The CagriSema phase 2 paper: a fixed combination of the two components in one weekly…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #26 · Wellbeing › Mental health · 31 Mar 2025 · 4 likes Post #22 describes the usual case. This is about the unusual one. History of disordered eating is a good example of a question where the honest answer is boring and the…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #85 · Compounds › Cagrilintide & amylin analogues · 22 Mar 2025 · 33 likes Second this, and I would have said it less carefully.
Domestic fridge temperature mapping: a cheap experiment — what changed since Replied, post #68 · Devices › Cold chain · 16 Mar 2025 · 0 likes Where the Domestic fridge temperature mapping discussion usually stalls is that nobody wants to say "I do not know" and everyone is willing to say "it varies". Those…
What a seizure notice actually says Replied, post #39 · Sourcing › Logistics · 5 Mar 2025 · 5 likes This is the sort of exchange that makes the archive worth searching.
Preservatives: function, testing, and limits Replied, post #15 · Pharmacology › Formulation chemistry · 28 Feb 2025 · 0 likes My experience of preservatives contradicts the reply above. I am posting it as a data point rather than as a refutation, because one person's experience is exactly that.
Journal club: STEP 4 and what a withdrawal design can prove — one year on Replied, post #33 · Evidence › Journal club · 9 Feb 2025 · 0 likes The baseline characteristics table is the single most useful page for the questions that get asked here, because it tells you who the result applies to.
SNAC and the mechanism of oral peptide absorption — the long version Replied, post #28 · Compounds › Oral incretins · 7 Feb 2025 · 21 likes The SOUL trial: cardiovascular outcomes trial for oral semaglutide in people with type 2 diabetes and cardiovascular disease or chronic kidney disease. It demonstrates…
Journal club: SURMOUNT-1, read without the press release Replied, post #39 · Evidence › Journal club · 6 Jan 2025 · 0 likes Marking my place. If it changes for me I will come back and say so.
Oxidation pathways for methionine and tryptophan Replied, post #54 · Analytics › Impurities & related substances · 30 Dec 2024 · 24 likes Reading back through the oxidation pathways for methionine threads from last year, the same three questions come up every time and only one of them has ever been…
Scheduled maintenance and what will be unavailable Replied, post #4 · Meta › Announcements · 29 Dec 2024 · 20 likes The opening post answers the question as asked. The question underneath it is different. The question underneath scheduled maintenance is usually "how would I tell?"…
Oral semaglutide bioavailability and its variability between people — a second dataset Replied, post #91 · Compounds › Oral incretins · 28 Dec 2024 · 23 likes The absorption enhancer in the licensed oral product works by transiently raising local gastric pH and promoting absorption across the mucosa. It is the reason the…
[2026 update] How to read a forest plot, properly, from scratch Replied, post #4 · Evidence › Trials · 26 Nov 2024 · 19 likes Where I part company with post #2, and it is a narrow parting. Absolute numbers, not just relative: a 30% relative reduction tells you the ratio but not the practical…
Turnaround times and what they mean for a decision — one year on Replied, post #16 · Sourcing › Independent verification · 23 Nov 2024 · 0 likes Building on post #15 rather than restating it. It does not extend to lots nobody has seen, it is not a recommendation, and it says nothing about anything other than…
Renal impairment: what the labelling says about dose Replied, post #4 · Clinical › Special populations · 21 Nov 2024 · 0 likes Hepatic impairment: less is known about dosing in significant liver disease than in kidney disease. Extreme caution applies because the liver metabolises a large…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #98 · Clinical › Prescriber conversations · 12 Nov 2024 · 6 likes The arithmetic in post #97 is right; the assumption feeding it is the part to check. Prescription logistics: confirm whether it will be filled locally, requires mail…
Follow-up: Recovery when intake is low: what to cut first Replied, post #14 · Nutrition & Training › Resistance training · 9 Nov 2024 · 21 likes Taking post #13 at face value and following it one step further. Nothing here is medical advice and anybody with a relevant condition should have a programme reviewed…
Second pass at: Hoarding and why it makes a shortage worse Replied, post #116 · Access › Shortages · 13 Oct 2024 · 1 like This follows post #113 rather than contradicting it. Where an alternative within the class is available, the comparison is a clinical one and the doses are not…
Hypertension improvement and when medication needs revisiting — a second dataset Replied, post #25 · Clinical › Comorbidities · 12 Oct 2024 · 13 likes The failure mode on Hypertension improvement is boring rather than dramatic. It is almost always the step everyone assumes was done correctly because it is too simple…
Requesting a page: what makes a good request — what changed since Replied, post #33 · Documentation › Wiki requests · 10 Oct 2024 · 0 likes Suggesting content for a page: if you know a maintained page is missing something important, post a suggestion with specific content you think should be added. If that…
Circumference measurements as a poor man's composition estimate Replied, post #27 · Outcomes › Body composition · 29 Jul 2024 · 0 likes Circumference measurements at marked sites, taken consistently, track composition change better than most people expect for the cost.
Guidelines revision: what changed and why Replied, post #57 · Meta › Announcements · 26 Jul 2024 · 4 likes The rare case here is the one that costs somebody a week, though, and the common case costs everyone ten seconds. I think the trade is clearly correct.
Splitting a weekly dose in two: the pharmacokinetic argument against — the long version Replied, post #89 · Practice › Dosing & titration · 9 Jul 2024 · 10 likes Splitting a weekly dose is worth one more sentence than it usually gets, and the sentence is the one about how the number was arrived at.
How this community labels and discusses unrefereed work Replied, post #43 · Evidence › Preprints · 26 Jun 2024 · 1 like Practical answer on community labels, since the theoretical one is upthread: do the simplest check first, write down the result, and only then decide whether the…