f.fonseca

TL2 · Trondheim

Contributes reviews on supplier material. Based in Trondheim.

Joined 1 October 2025 · last posted 5d

55 posts, newest first. Showing up to 150.

Restarting after a long gap: what the labelling implies Replied, post #40 · Practice › Dosing & titration · 23 Jul 2026 · 21 likes This is the answer, and the reason it is the answer is the more useful part.
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #111 · Evidence › Journal club · 16 Jul 2026 · 24 likes Post #107 put the caveat in the right place and I want to underline it. Checked the SURMOUNT-OSA claim against the primary source this morning. It survives, with a…
Tracking intake honestly when appetite is absent Replied, post #85 · Nutrition & Training › Protein & intake · 4 Jul 2026 · 21 likes Taking post #82 at face value and following it one step further. Where intake has fallen a long way, protein is usually the first thing to fall because it is the least…
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #73 · Evidence › Journal club · 1 Jul 2026 · 1 like What I want from this SURMOUNT-OSA 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: Where the four-week escalation interval comes from, and what it is not Replied, post #5 · marked as the solution · Practice › Dosing & titration · 29 Jun 2026 · 7 likes The most common practical error is not the schedule at all — it is losing track of which step you are on after a break, and then resuming at the top rather than…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full Replied, post #95 · Practice › Reconstitution · 23 Jun 2026 · 7 likes Two people can reconstitute the same vial to different concentrations and both be right. The dose is the same; only the volume drawn differs. This confuses more…
Journal club: orforglipron phase 2 and the non-peptide question Replied, post #91 · Evidence › Journal club · 14 Jun 2026 · 3 likes Narrowing post #90, because the general version has more than one answer. An update on my earlier orforglipron phase 2 post: the pattern held for another six weeks and…
Prescription requirements and telehealth models — a second dataset Replied, post #40 · Sourcing › Regulatory · 24 May 2026 · 6 likes An indication approved for one age range does not extend to another, and paediatric extensions are separate decisions with separate evidence. Written quickly, so the…
How much fluid is actually needed, and how you would know Replied, post #11 · Nutrition & Training › Hydration & electrolytes · 22 May 2026 · 4 likes Picking up post #8: that is the part I would want checked first. Rapid correction of a genuine abnormality can be more dangerous than the abnormality, which is another…
Revisiting: What pooling buys you and what it destroys Replied, post #28 · Evidence › Meta-analyses · 20 May 2026 · 0 likes Post #26 describes the usual case. This is about the unusual one. Individual participant data pooling is a much stronger design than aggregate pooling and is rare…
Fasting versus non-fasting and which tests care Replied, post #26 · Clinical › Bloodwork · 10 May 2026 · 0 likes Adding the measurement that post #25 says would settle it. I keep a log for fasting versus non-fasting specifically because my memory of it turned out to be…
Type 2 diabetes and the largest part of the evidence base — does this still hold? Replied, post #8 · marked as the solution · Clinical › Comorbidities · 8 May 2026 · 8 likes Gastrointestinal conditions interact with a mechanism that slows gastric emptying in ways that are plausible and largely unstudied. Marking that as an opinion rather…
Spreadsheets: an appreciation — what changed since Replied, post #32 · Lounge › Off topic · 2 May 2026 · 0 likes I changed my mind about Spreadsheets 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…
Reused chromatograms across lots: how to spot it Replied, post #38 · Analytics › COA interpretation · 2 May 2026 · 9 likes Post #37 is right about the mechanism and I think understates the practical bit. Practical note on reused chromatograms across lots: write down what you expect before…
Bug report: the reconstitution calculator and a rounding edge case Replied, post #42 · Data & Tools › Calculators · 7 Apr 2026 · 4 likes Post #41 is right about the mechanism and I think understates the practical bit. Mass error checking: enter your observed mass and theoretical mass and check whether…
Which panel is worth repeating and which is worth ignoring — a second dataset Replied, post #110 · Clinical › Bloodwork · 25 Mar 2026 · 22 likes That is the distinction I keep failing to hold on to. Written down now.
Reading U-100 graduations, with a conversion table Replied, post #17 · Devices › Syringes & needles · 20 Mar 2026 · 6 likes U-100 means the barrel is graduated for a solution containing one hundred units of insulin per millilitre. For anything that is not insulin, the units are simply…
Coming back to: Semaglutide in people without diabetes: what the evidence base looks like Replied, post #41 · Compounds › Semaglutide · 17 Mar 2026 · 0 likes Counter-ion form matters for the arithmetic and is almost never stated. A vial labelled 5 mg of peptide as an acetate salt and one labelled 5 mg as trifluoroacetate do…
Coming back to: Training through a dose escalation week Replied, post #34 · Nutrition & Training › Resistance training · 21 Feb 2026 · 4 likes Building on post #32 rather than restating it. Answering the Training through a dose escalation question as asked, then the question I think is meant. As asked: yes,…
When to stop reading forums, including this one Replied, post #87 · Wellbeing › Mental health · 8 Feb 2026 · 11 likes Where I part company with post #83, and it is a narrow parting. Motivation and expectation: starting with clear motivation and realistic expectations about what will…
Stepping down deliberately, and how to do it without losing progress Replied, post #51 · Practice › Dosing & titration · 31 Jan 2026 · 16 likes Going back down a step is not a failure and the trials allowed it. Several protocols permitted a return to the previous dose for tolerability and then a second attempt…
Why an oral GLP-1 agonist is a formulation achievement more than a chemistry one Replied, post #130 · Compounds › Oral incretins · 5 Jan 2026 · 0 likes Dose numbers for oral formulations are not comparable to injectable ones. The 14 mg oral dose is not equivalent to any injectable dose in the traditional comparison…
Why the titration planner refuses to produce a schedule below a floor Replied, post #21 · Data & Tools › Calculators · 23 Dec 2025 · 26 likes Titration planning: a calculator that shows you the escalation schedule for different starting and ending doses can help you visualize your path. Actual path might be…
DXA precision and the least significant change for lean mass Replied, post #35 · Outcomes › Body composition · 1 Dec 2025 · 25 likes DXA (dual-energy X-ray absorptiometry): the standard for body composition in research. Precision is roughly ±1 kg for lean mass. Two scans six months apart on the same…
Comparing my trajectory with the trial curves, carefully Replied, post #81 · Outcomes › Progress reports · 25 Nov 2025 · 0 likes Post #80 is the version of this I will quote in future. One addition. Rate of change matters more than the absolute number for most of the questions people ask about…
[2026 update] How much of the diluent volume the powder itself displaces Replied, post #39 · Practice › Reconstitution · 24 Nov 2025 · 4 likes Concentration is total mass divided by total volume, and everything else follows from that. Ten milligrams into two millilitres is five milligrams per millilitre, and…
Tracking that stops updating and then resumes — the long version Replied, post #37 · Sourcing › Logistics · 12 Nov 2025 · 10 likes Narrowing post #34, because the general version has more than one answer. Import restrictions by jurisdiction: what is legal to import for personal use varies…
Sleep tracking data and its considerable limitations Replied, post #91 · Wellbeing › Sleep · 26 Oct 2025 · 9 likes Building on post #88 rather than restating it. Sleep quality versus quantity: some people report changes to sleep duration; others report changes to sleep quality…
Power cut for eleven hours: how I assessed it afterwards Replied, post #101 · Practice › Storage & stability · 18 Oct 2025 · 2 likes Post #97 describes the usual case. This is about the unusual one. Clarity is a weak test. A solution can lose a significant fraction of its active content to…
Reconciling a supplier certificate with an independent result Replied, post #2 · Sourcing › Vendor reports · 7 Oct 2025 · 23 likes Comparing your result to somebody else's on a different lot is not a comparison of suppliers. Lot is the unit and it should be in every report.
Follow-up: The decimal-point error, and the habit that catches it Replied, post #60 · Practice › Reconstitution · 15 Sep 2025 · 7 likes Whatever the answer on decimal-point error turns out to be, the method for getting there is the same: state the assumption, do the arithmetic in public, invite the…
Enforcement priorities versus written rules — does this still hold? Replied, post #23 · Sourcing › Regulatory · 22 Aug 2025 · 0 likes Enforcement practice and legal position are different things and both matter to somebody making a decision. Conflating them is common in both directions. I would want…
Revisiting: Filter needles: when they help and what they cost you Replied, post #47 · Devices › Syringes & needles · 19 Aug 2025 · 13 likes Filter needles are for drawing from glass ampoules where particulate is a real risk. For a stoppered vial they add dead volume in exchange for very little. Two sources,…
Second pass at: Why this subcategory is stricter about sourcing than most Replied, post #58 · Compounds › Secretagogues & GH axis · 12 Aug 2025 · 6 likes Answering the question post #54 raises rather than the one it answers. On analysis: these are short peptides and generally straightforward chromatographically, which…
Which panel is worth repeating and which is worth ignoring Replied, post #78 · Clinical › Bloodwork · 6 Aug 2025 · 1 like Post #77 describes the usual case. This is about the unusual one. Time of day: some biomarkers vary across the day. Cortisol in the morning differs from cortisol in the…
Immortal time bias in a claims-database study Replied, post #12 · Evidence › Study critique · 3 Aug 2025 · 0 likes Post #10 and I disagree about the size of the effect, not about the direction. Immortal time bias looks different depending on whether you are reading the primary…
A ten-fold dose error caught before injection — one year on Replied, post #71 · Devices › Syringes & needles · 3 Aug 2025 · 2 likes Practical experience of ten-fold dose error caught, offered as one case with the conditions stated, not as a general finding. Conditions first, because they are what…
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #52 · Access › Insurance & coverage · 21 Jul 2025 · 28 likes I came in to disagree and I am leaving without a disagreement.
Coming back to: Nausea profile of amylin analogues compared with GLP-1 agonists Replied, post #40 · Compounds › Cagrilintide & amylin analogues · 10 Jul 2025 · 22 likes Agreed on Nausea profile of amylin analogues, with one qualification that I think matters. The reasoning holds for the case as described. Change the starting assumption…
Domestic fridge temperature mapping: a cheap experiment — what changed since Replied, post #136 · Devices › Cold chain · 5 Jul 2025 · 9 likes Reading rather than answering, but this is the post I would point somebody at.
Promotion criteria, and the one that stops most nominations — the long version Replied, post #19 · Documentation › Doc review · 30 Jun 2025 · 11 likes Where I part company with post #16, and it is a narrow parting. Reviewing your own nomination is fine and is not sufficient. Somebody else has to read it for the…
Antibiotics and a course of something with delayed emptying Replied, post #49 · Practice › Interactions · 25 May 2025 · 1 like I disagree with the framing of antibiotics above, and I think it is a substantive disagreement rather than a terminological one. Setting out why, so it can be checked.…
Coming back to: Over-dilution: when your dose falls below one readable graduation Replied, post #8 · Practice › Reconstitution · 30 Apr 2025 · 0 likes The most useful thing anyone has posted about Over-dilution in this category was a table of what had been measured and by whom. That is what I would want again.
Revisiting: Oral versus injected administration claims for BPC-157 Replied, post #25 · Compounds › Repair & healing peptides · 28 Apr 2025 · 2 likes What I can speak to on Oral versus injected administration claims is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not…
When a preprint is the best available evidence and we say so — a second dataset Replied, post #20 · Evidence › Preprints · 23 Apr 2025 · 6 likes If you cite a preprint in a maintained document here, the convention is to label it in the sentence and to note the check date. The document review will catch the…
Retatrutide dose escalation in the published trials Replied, post #156 · Compounds › Retatrutide · 19 Apr 2025 · 8 likes Answering the question post #154 raises rather than the one it answers. The most useful thing anyone has posted about retatrutide dose escalation in this category was a…
Second pass at: Pen dose counters: what a click does and does not guarantee Replied, post #12 · Devices › Pens & autoinjectors · 4 Apr 2025 · 19 likes Storage after first use: most pens can be stored at room temperature after first use, even if unrefrigerated, for a limited time (often 28 days). Check your specific…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #12 · Wellbeing › Mental health · 1 Mar 2025 · 0 likes Social and relationship impacts: weight change affects how others perceive and interact with a person. Those impacts are real and can be psychologically significant. It…
Oxidation and deamidation mass shifts, tabulated Replied, post #32 · Analytics › Mass spectrometry · 7 Jan 2025 · 0 likes Oxidation adds sixteen per oxygen and is the most common modification seen in aged material. Its presence in the spectrum is informative about handling as well as…
[2026 update] How to read a forest plot, properly, from scratch Replied, post #32 · Evidence › Trials · 13 Dec 2024 · 24 likes Absolute and relative effects answer different questions. Write down the event rate in each arm and the difference between them; everything quotable is derived from…
Revisiting: How to bring a laboratory report to an appointment usefully Replied, post #86 · Clinical › Bloodwork · 6 Oct 2024 · 12 likes Filing a mild objection to the consensus on bring a laboratory. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit.
Second pass at: Sodium, potassium and magnesium when intake drops Replied, post #125 · Nutrition & Training › Hydration & electrolytes · 30 Sep 2024 · 10 likes Post #122 is right about the mechanism and I think understates the practical bit. Constipation and hydration: dehydration makes constipation worse. Increasing fluid…
When a red flag was a misunderstanding, and the retraction Replied, post #7 · Sourcing › Red flags · 25 Aug 2024 · 0 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.
Cold packs, phase-change material, and what survives ten days Replied, post #77 · Sourcing › Logistics · 6 Jul 2024 · 12 likes Cold packs was covered in the wiki last year and the page has a review date on it, which is a better starting point than my memory of a thread.
How this community labels and discusses unrefereed work Replied, post #23 · Evidence › Preprints · 16 Jun 2024 · 0 likes Genuine question rather than a rhetorical one: has anyone here actually observed community labels, as opposed to read about it? The thread is long and I cannot tell.