f.amankwah

TL2 · Split

Contributes reviews on supplier material. Based in Split.

Joined 19 January 2025 · last posted 12h

74 posts, newest first. Showing up to 150.

An 18-month record including the parts that went badly Replied, post #82 · Outcomes › Progress reports · 27 Jul 2026 · 1 like Maintenance series are the ones this subcategory needs most and receives least. The interesting questions all change once loss stops.
What a reversed-phase purity number actually is Replied, post #100 · Analytics › HPLC & UHPLC · 27 Jul 2026 · 6 likes Everything in post #99 holds. The case it does not cover is the one I have. Method validation is the demonstration that a method can separate the compound from its…
Muscle cramps: the ordinary causes before the exotic ones — a second dataset Replied, post #78 · Practice › Side effects · 27 Jul 2026 · 6 likes The number people quote for Muscle cramps is a central estimate presented without its interval, and the interval is wide enough that the estimate is nearly…
Reconstituting a multi-strength kit without mixing yourself up — what changed since Replied, post #45 · Practice › Reconstitution · 23 Jul 2026 · 23 likes Taking post #42 at face value and following it one step further. Preservative effectiveness is tested against a defined microbial challenge under defined conditions. It…
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #106 · Sourcing › Vendor reports · 22 Jul 2026 · 0 likes Confirming post #105 from a second method, which matters more than confirming it from a second person. Dosing and purity: a vial that is 99% pure might contain 80% of…
A widely repeated interaction claim that turns out to be unsupported — what changed since Replied, post #89 · Practice › Interactions · 20 Jul 2026 · 3 likes Post #87 and I disagree about the size of the effect, not about the direction. Gastrointestinal symptoms from one compound can mask or mimic an interaction with…
Review: a draft on reconstitution arithmetic, with objections — one year on Replied, post #43 · Documentation › Doc review · 12 Jul 2026 · 21 likes Review of promoted topics: when a topic is nominated for promotion to a maintained documentation page, the draft is posted here. Community review happens before…
Tracking intake honestly when appetite is absent Replied, post #83 · Nutrition & Training › Protein & intake · 3 Jul 2026 · 0 likes That is a fair summary of where the discussion has got to.
Coming back to: Time to steady state after a dose increase Replied, post #88 · Pharmacology › Pharmacokinetics · 29 Jun 2026 · 19 likes Bioavailability: oral semaglutide has low bioavailability (roughly 1%) due to peptide instability. That is why the oral dose (14 mg) is so much larger than the…
Dizziness on standing and the electrolyte explanation — does this still hold? Replied, post #94 · Practice › Side effects · 16 Jun 2026 · 11 likes Worth separating two things that post #90 runs together. Dizziness on standing has been discussed here with more heat than it deserves, mostly because two definitions…
Journal club: orforglipron phase 2 and the non-peptide question Replied, post #93 · Evidence › Journal club · 16 Jun 2026 · 31 likes The strongest argument against my own position on orforglipron phase 2, stated as well as I can state it, since nobody else has yet.
Comparing prices across jurisdictions without misleading yourself Replied, post #14 · Access › Pricing · 28 May 2026 · 17 likes Practical answer on comparing prices across jurisdictions, since the theoretical one is upthread: do the simplest check first, write down the result, and only then…
Fasting versus non-fasting and which tests care Replied, post #28 · Clinical › Bloodwork · 13 May 2026 · 12 likes Thank you for the correction. I would rather find out here than later.
Citation sweep results: how many references did not say what was claimed Replied, post #92 · Meta › Wiki maintenance · 9 May 2026 · 26 likes That is clearer than the version I had in my head. Thank you.
Revisiting: What pooling buys you and what it destroys Replied, post #17 · Evidence › Meta-analyses · 9 May 2026 · 0 likes On post #15 — agreed on the reasoning, with one qualification. Pooling buys sits at the boundary between what this community can usefully discuss and what it cannot,…
Spreadsheets: an appreciation — what changed since Replied, post #34 · Lounge › Off topic · 4 May 2026 · 10 likes Adjacent and interesting: you might post something about nutrition, bioavailability from a food perspective, or the sociology of weight. Adjacent to this community's…
What changed in 2026, by region — does this still hold? Replied, post #6 · Access › International · 3 May 2026 · 0 likes Licensed prescribing: where a compound is approved, prescribing is restricted to licensed prescribers. Where it is not approved, the legality of possession and use is…
Bug report: the reconstitution calculator and a rounding edge case Replied, post #44 · Data & Tools › Calculators · 7 Apr 2026 · 0 likes Reporting bugs: if you notice a calculator giving wrong results, report it in this subcategory. Bugs are fixed when identified.
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #4 · Analytics › Home & field testing · 31 Mar 2026 · 1 like The most useful home practice is not a test at all: photograph the vial, the cake, the label and the document on arrival. It costs nothing and it is the evidence you…
[2026 update] Charge states for a 4 kDa peptide, worked through Replied, post #25 · Analytics › Mass spectrometry · 23 Mar 2026 · 31 likes Something worth flagging about Charge states: the strongest-sounding claims in this thread are the ones with no source attached, which is the usual pattern and not a…
Reading U-100 graduations, with a conversion table Replied, post #15 · Devices › Syringes & needles · 8 Mar 2026 · 30 likes Reading U-100 graduations is one of those subjects where the general answer and the answer for a specific case diverge, and the thread will go in circles until someone…
[2026 update] Amylin and gastric emptying: overlapping mechanisms with incretins Replied, post #16 · Compounds › Cagrilintide & amylin analogues · 1 Mar 2026 · 4 likes I had written a reply contradicting post #14 and deleted it. Here is what survived. For anyone arriving from searches on "amylin agonist": this subcategory discusses…
Sample size intuition for a personal experiment — does this still hold? Replied, post #5 · Research Methods › Statistics · 1 Mar 2026 · 12 likes Where I part company with the opening post, and it is a narrow parting. Adding the boring version of Sample size intuition, because the interesting version keeps…
Coming back to: Training through a dose escalation week Replied, post #32 · Nutrition & Training › Resistance training · 18 Feb 2026 · 27 likes I would put moderate confidence on the mainstream reading of Training through a dose escalation and no more. That is not scepticism for its own sake; it is where the…
Pregnancy and pregnancy planning: contraindication and washout Replied, post #36 · Clinical › Special populations · 8 Feb 2026 · 0 likes Genetic and ancestry-related differences in response are asked about regularly and the published evidence is thin enough that the honest answer is short. Not a strong…
[2026 update] Long-time reader, first-time poster Replied, post #45 · Lounge › Introductions · 26 Jan 2026 · 5 likes The arithmetic on Long-time reader is the easy part and it is where the errors are, which is an uncomfortable combination. Show your working and someone will catch it.
Packaging that arrived damaged: documenting it properly — a second dataset Replied, post #27 · Sourcing › Logistics · 24 Jan 2026 · 5 likes Confirming post #24 from a second method, which matters more than confirming it from a second person. Peak periods and public holidays affect this more than any other…
A calculator that gives a right answer to the wrong question Started this topic · Data & Tools › Calculators · 7 Jan 2026 · 7 likes Posting this under the heading it deserves: A calculator that gives a right answer to the wrong question Everything below is what sits behind that. Posting the…
Why the titration planner refuses to produce a schedule below a floor Replied, post #23 · Data & Tools › Calculators · 29 Dec 2025 · 2 likes Post #20 is the version of this I will quote in future. One addition. The useful distinction on titration planner refuses is between what was measured and what was…
What "verified" means on our vendor pages, stated narrowly Replied, post #2 · Sourcing › Vendor reports · 22 Dec 2025 · 0 likes Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if the other mass is water, counter-ion, and excipient. Purity and content are…
The decimal-point error, and the habit that catches it Replied, post #110 · Practice › Reconstitution · 18 Dec 2025 · 12 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. Written…
DXA precision and the least significant change for lean mass Replied, post #37 · Outcomes › Body composition · 2 Dec 2025 · 1 like I had read the opposite somewhere and cannot now find where, which tells me something.
Comparing my trajectory with the trial curves, carefully Replied, post #83 · Outcomes › Progress reports · 30 Nov 2025 · 8 likes Non-scale victories: muscle gain or maintenance, clothing fit, energy level, and capability (like climbing stairs without breathlessness) are measurements that…
Pen dose counters: what a click does and does not guarantee Replied, post #79 · Devices › Pens & autoinjectors · 17 Nov 2025 · 0 likes Storage instructions for a pen typically differ before and after first use, and the in-use period is the one people miss. It is on the carton.
[2026 update] Does dual agonism explain the effect size, or is it dose? Replied, post #62 · Compounds › Tirzepatide · 2 Nov 2025 · 0 likes Research-use-only tirzepatide is not approved for human use and is not made to pharmaceutical standards. Anyone discussing it here is describing what they did, not…
Sleep tracking data and its considerable limitations Replied, post #97 · Wellbeing › Sleep · 26 Oct 2025 · 0 likes Adding a data point of agreement rather than a data point.
Sleep tracking data and its considerable limitations Replied, post #72 · Wellbeing › Sleep · 24 Oct 2025 · 8 likes Where a partner reports a change the person has not noticed, that observation is usually the more reliable one. That distinction has done more work for me than anything…
High-resolution MS on aggregates and what it can see Replied, post #85 · Analytics › Mass spectrometry · 5 Oct 2025 · 9 likes Post #84 is right about the mechanism and I think understates the practical bit. A note on how high-resolution gets discussed rather than on high-resolution itself: the…
Compounds this community declines to help with, and why Replied, post #23 · Compounds › Other compounds · 27 Sep 2025 · 1 like Post #19 put the caveat in the right place and I want to underline it. For any compound without a widely available reference standard, retention-time comparisons across…
Liver enzymes drifting down and what that usually means Replied, post #12 · Clinical › Bloodwork · 18 Sep 2025 · 0 likes On post #10 — agreed on the reasoning, with one qualification. Where a panel includes a calculated value, that value inherits the imprecision of everything it was…
Reverse causation in a cohort study of weight and outcome — a second dataset Replied, post #52 · Evidence › Study critique · 14 Sep 2025 · 3 likes Post #48 describes the usual case. This is about the unusual one. Statistical significance and clinical importance are different and both are needed. A significant…
Why fasting instructions for oral semaglutide are not optional advice — does this still… Replied, post #89 · Compounds › Oral incretins · 26 Aug 2025 · 30 likes Oral semaglutide's bioavailability is low and variable, which is why the dose numbers are an order of magnitude different from the injectable. That is a formulation…
Tracking that stops updating and then resumes Replied, post #20 · Sourcing › Logistics · 23 Aug 2025 · 10 likes Narrowing post #19, because the general version has more than one answer. Document outcomes rather than forecasting them. A forecast in this category reads as…
Enforcement priorities versus written rules — does this still hold? Replied, post #21 · Sourcing › Regulatory · 21 Aug 2025 · 4 likes Picking up post #18: that is the part I would want checked first. Small correction to my own earlier position on Enforcement priorities. I had the units the wrong way…
[2026 update] What we do not know about retatrutide, listed explicitly Replied, post #39 · Compounds › Retatrutide · 7 Aug 2025 · 6 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…
Revisiting: Filter needles: when they help and what they cost you Replied, post #41 · Devices › Syringes & needles · 30 Jul 2025 · 0 likes Post #37 describes the usual case. This is about the unusual one. Filter needles looks different depending on whether you are reading the primary literature or the…
A report I filed that turned out to be wrong, and the correction Replied, post #104 · Sourcing › Vendor reports · 15 Jun 2025 · 1 like Do not adjust a reported figure. Post what the laboratory said and put your interpretation in a separate sentence. Happy to expand any of that if it is the useful part.
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #61 · Compounds › Cagrilintide & amylin analogues · 10 Jun 2025 · 3 likes CagriSema phase 2 paper sits at the boundary between what this community can usefully discuss and what it cannot, and I think it falls on the discussable side, narrowly.
An emergency department visit, described afterwards Replied, post #29 · Safety › Adverse events · 9 Jun 2025 · 15 likes Reading rather than answering, but this is the post I would point somebody at.
[2026 update] Constipation management, with a dietitian's contribution Replied, post #2 · Practice › Side effects · 28 May 2025 · 5 likes Understood, and I withdraw the assumption I opened with.
Travel coolers and how long they really hold — the long version Replied, post #22 · Devices › Cold chain · 23 May 2025 · 19 likes Building on post #19 rather than restating it. Where I would push back on the Travel coolers consensus is the confidence, not the direction. The direction looks right.…
Why oral semaglutide needs an absorption enhancer at all Replied, post #7 · Compounds › Oral incretins · 20 May 2025 · 24 likes Dose equivalence between oral and injectable formulations is not a simple conversion and no published factor should be used as one. The two were developed and titrated…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #92 · Practice › Interactions · 19 May 2025 · 9 likes Bookmarking this. I will come back when I have something worth adding.
Coming back to: Official shortage notices and what they authorise Replied, post #5 · Access › Shortages · 12 May 2025 · 0 likes On the opening post — agreed on the reasoning, with one qualification. An update on my earlier Official shortage notices post: the pattern held for another six weeks…
A well-designed study with a badly written abstract Replied, post #70 · Evidence › Study critique · 9 May 2025 · 9 likes Second this, and I would have said it less carefully.
Revisiting: Oral versus injected administration claims for BPC-157 Replied, post #27 · Compounds › Repair & healing peptides · 2 May 2025 · 21 likes Narrowing post #24, because the general version has more than one answer. BPC-157's published evidence is overwhelmingly preclinical and mostly rodent. That is not a…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #43 · Wellbeing › Mental health · 1 May 2025 · 11 likes For anyone finding this later: the short answer on history of disordered eating is that it depends on one thing, and the rest of the thread is people identifying which…
Retatrutide dose escalation in the published trials Replied, post #154 · Compounds › Retatrutide · 19 Apr 2025 · 0 likes What we do not know about retatrutide, listed explicitly: long-term safety, real-world response rates, the dose response in diverse populations, whether the heart-rate…
Coming back to: Over-dilution: when your dose falls below one readable graduation Replied, post #2 · Practice › Reconstitution · 3 Apr 2025 · 5 likes The opening post answers the question as asked. The question underneath it is different. On a U-100 insulin syringe, one hundred units is one millilitre and one unit is…
Oxidation and deamidation mass shifts, tabulated Replied, post #63 · Analytics › Mass spectrometry · 28 Feb 2025 · 19 likes Common adducts: sodium adds ≈22, potassium adds ≈38 compared to hydrogen. A [M+Na]+ peak is common and its mass is predictable from the base mass. I have left out the…
Obstructive sleep apnoea and a hard endpoint in this class Replied, post #2 · Clinical › Comorbidities · 21 Jan 2025 · 29 likes Reading back through, this was answered upthread and I missed it. My fault.
[2026 update] New subcategory: rationale and scope Replied, post #140 · Meta › Announcements · 11 Jan 2025 · 5 likes The arithmetic in post #137 is right; the assumption feeding it is the part to check. Adding a small correction to the New subcategory summary above rather than a…
Fixed versus detachable needles: the trade-offs Replied, post #53 · Devices › Syringes & needles · 16 Dec 2024 · 6 likes Needle length for subcutaneous delivery is a question about tissue depth and injection angle together. Short needles at ninety degrees and longer ones at an angle reach…
Promotion criteria, and the one that stops most nominations Replied, post #113 · Documentation › Doc review · 14 Nov 2024 · 3 likes Second this, and I would have said it less carefully.
Requesting a page: what makes a good request — what changed since Replied, post #86 · Documentation › Wiki requests · 12 Oct 2024 · 0 likes Scope the request narrowly. A page about one thing gets written and stays current; a page about a field does not.
Second pass at: Hoarding and why it makes a shortage worse Replied, post #42 · Access › Shortages · 10 Oct 2024 · 14 likes Picking up post #41: that is the part I would want checked first. Shortage-driven price movement is real and is a separate question from availability. The general…
Revisiting: How to bring a laboratory report to an appointment usefully Replied, post #88 · Clinical › Bloodwork · 7 Oct 2024 · 0 likes Confirming post #85 from a second method, which matters more than confirming it from a second person. Glycaemic markers integrate over different periods. A point…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #7 · Compounds › Cagrilintide & amylin analogues · 3 Oct 2024 · 0 likes Noted, and I have changed what I was going to do on the strength of it.
Converting between mg/mL and units per dose, both directions Replied, post #38 · Practice › Reconstitution · 3 Oct 2024 · 0 likes Agreed on all of that, and I have nothing to add to it.
SURPASS-2 and the comparator dose question that will not go away Replied, post #21 · Compounds › Tirzepatide · 24 Sep 2024 · 0 likes Answering the SURPASS-2 question as asked, then the question I think is meant. As asked: yes, with the qualification below. As meant: it depends on how the first…
Second pass at: Journal club: LEADER as the historical anchor Replied, post #28 · Evidence › Journal club · 15 Jul 2024 · 0 likes The most common failure mode is spending fifty minutes on the effect size and ten on the population. Reversing that ratio would improve most sessions.
Oral contraceptives and delayed emptying: what the data shows Replied, post #24 · Practice › Interactions · 10 Jul 2024 · 5 likes The documentation on oral contraceptives and delayed emptying is better than this thread and I say that as someone who has posted in the thread.
Cold packs, phase-change material, and what survives ten days Replied, post #71 · Sourcing › Logistics · 4 Jul 2024 · 0 likes Post #70 is the version of this I will quote in future. One addition. What I would check first on cold packs is whether the thing being measured moved or whether the…
How this community labels and discusses unrefereed work Replied, post #21 · Evidence › Preprints · 15 Jun 2024 · 0 likes This follows post #18 rather than contradicting it. I have no financial interest in anything named in this thread and I want to say so before I comment on community…