s.rasmussen

TL2 Moderator · Setúbal

Contributes reviews on supplier material. Based in Setúbal.

Joined 10 March 2025 · last posted 9h

78 posts, newest first. Showing up to 150.

Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #90 · Analytics › Home & field testing · 28 Jul 2026 · 0 likes False positives and false negatives: no test has 100% sensitivity and 100% specificity. A negative result does not guarantee absence; a positive result does not…
Tesamorelin has an approved indication — what that changes about the evidence Replied, post #28 · Compounds › Secretagogues & GH axis · 27 Jul 2026 · 23 likes Pulsatile secretion matters because growth hormone is secreted in pulses, not continuously. A single post-dose growth hormone level is nearly uninterpretable. Assessing…
Immortal time bias in a claims-database study — one year on Replied, post #46 · Evidence › Study critique · 26 Jul 2026 · 0 likes On post #42 — agreed on the reasoning, with one qualification. Building consensus on which criticisms matter: if everyone agrees that the sample size is small but only…
Journal club: LEADER as the historical anchor Replied, post #109 · Evidence › Journal club · 24 Jul 2026 · 0 likes For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.
Documenting a supplier's response to a discrepancy Replied, post #45 · Sourcing › Vendor reports · 22 Jul 2026 · 0 likes This follows post #42 rather than contradicting it. Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if the other mass is water,…
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #117 · Evidence › Journal club · 19 Jul 2026 · 3 likes I read post #115 twice before replying, because I had assumed the opposite. SURMOUNT-OSA (N Engl J Med 2024): Tirzepatide in obstructive sleep apnoea, using an…
Coming back to: Why I now write the concentration on the vial in marker Replied, post #12 · Practice › Reconstitution · 16 Jul 2026 · 0 likes A vial that will not fully dissolve: check in order: is the diluent genuinely room temperature (some preservatives crystallise in cold), is the vial being warmed gently…
Programming during a large energy deficit Replied, post #39 · Nutrition & Training › Resistance training · 13 Jul 2026 · 22 likes Recovery: heavier training on a energy deficit and on a compound that slows gastric emptying requires attention to recovery (sleep, nutrition, stress). Recovery…
Revisiting: The best-written scientific paper you have read Replied, post #87 · Lounge › Off topic · 12 Jul 2026 · 1 like I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
How shortages have affected compounding permissions Replied, post #29 · Access › Shortages · 11 Jul 2026 · 1 like Communication from suppliers: a supplier having supply problems usually communicates them. If a supplier goes silent, that is itself information.
Selection into a registry and what it does to the estimate — a second dataset Replied, post #9 · marked as the solution · Evidence › Study critique · 6 Jul 2026 · 7 likes post #8 answers the question as asked. The question underneath it is different. Building consensus on which criticisms matter: if everyone agrees that the sample size…
Tracking intake honestly when appetite is absent Replied, post #87 · Nutrition & Training › Protein & intake · 6 Jul 2026 · 2 likes Leucine and MPS: leucine stimulates muscle protein synthesis at a threshold of roughly 2 to 3 grams per meal. That influences how much protein per meal matters, but…
What to bring: records that a clinician can actually use — a second dataset Replied, post #2 · Clinical › Prescriber conversations · 2 Jul 2026 · 9 likes What to bring: copies of relevant lab results, pharmacy records (to confirm doses actually taken), and records of any adverse effects you have experienced with other…
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #71 · Evidence › Journal club · 30 Jun 2026 · 17 likes TRIUMPH (ongoing): Retatrutide phase 3. No results yet. Nothing should be attributed to it because it has not finished. When it does, this discussion will return to it.
[2026 update] Travelling with an injectable: documentation and practicalities Replied, post #43 · Access › International · 28 Jun 2026 · 17 likes Language barriers: if you need to communicate with a supplier, clinician, or regulator in a language not your first language, misunderstanding is possible. Clarify when…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full Replied, post #93 · Practice › Reconstitution · 21 Jun 2026 · 0 likes Picking up post #90: that is the part I would want checked first. Choosing a concentration on purpose rather than by accident: starting with "I want to draw 0.5 mL per…
Preservatives: function, testing, and limits — one year on Replied, post #24 · Pharmacology › Formulation chemistry · 15 Jun 2026 · 10 likes I read post #22 twice before replying, because I had assumed the opposite. Amino acid residues and formulation: the specific sequence and composition of a peptide…
Injecting into an area that has become firm: why not to Replied, post #54 · Practice › Administration · 11 Jun 2026 · 33 likes Pinch or no pinch: the decision depends on needle length and on your own anatomy. A longer needle (8 mm and up) reaches subcutaneous tissue easily without a pinch. A…
Follow-up: UK access routes, dated and sourced Replied, post #2 · Regional › UK & Ireland · 2 Jun 2026 · 0 likes I read the opening post twice before replying, because I had assumed the opposite. Private prescribing is legal and widespread, including through remote consultation.…
Coming back to: A structured critique template this community uses Replied, post #21 · Evidence › Study critique · 29 May 2026 · 0 likes When you change your mind: if a reply convinces you that your criticism was not well-founded, say so plainly. The critique might still be real but smaller than you…
How much fluid is actually needed, and how you would know Replied, post #13 · Nutrition & Training › Hydration & electrolytes · 26 May 2026 · 27 likes Sodium: losing weight involves losing some sodium. Electrolyte drinks or salty foods help maintain sodium balance. Very low sodium intake on these compounds raises…
Why fasting instructions for oral semaglutide are not optional advice Replied, post #10 · Compounds › Oral incretins · 21 May 2026 · 0 likes I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
Revisiting: What pooling buys you and what it destroys Replied, post #26 · Evidence › Meta-analyses · 18 May 2026 · 8 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…
HbA1c lag and what it can and cannot tell you at eight weeks — one year on Replied, post #3 · Clinical › Bloodwork · 11 May 2026 · 0 likes This follows post #2 rather than contradicting it. HbA1c and glucose: HbA1c reflects average glucose over months; a spot glucose measurement reflects the moment.…
Reused chromatograms across lots: how to spot it Replied, post #40 · Analytics › COA interpretation · 10 May 2026 · 2 likes I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
An 18-month record including the parts that went badly Replied, post #10 · Outcomes › Progress reports · 5 May 2026 · 14 likes Picking up post #7: that is the part I would want checked first. For anyone arriving from a search: the marked solution above is the direct answer, and the replies…
Type 2 diabetes and the largest part of the evidence base — does this still hold? Replied, post #6 · Clinical › Comorbidities · 26 Apr 2026 · 0 likes Obstructive sleep apnoea: SURMOUNT-OSA used an objective endpoint, the apnoea-hypopnoea index. Reduction was substantial. Whether the benefit is weight loss or a direct…
Bug report: the reconstitution calculator and a rounding edge case Replied, post #48 · Data & Tools › Calculators · 8 Apr 2026 · 0 likes Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
Follow-up: Search filters: what is missing Replied, post #63 · Meta › Site feedback · 28 Mar 2026 · 0 likes Bugs and friction: the parts of the site that do not work the way you expected. Report them specifically (what you did, what you expected, what happened instead) so…
[2026 update] Charge states for a 4 kDa peptide, worked through Replied, post #29 · Analytics › Mass spectrometry · 25 Mar 2026 · 1 like Electrospray ionisation produces multiply charged ions. For a 4 kDa peptide you expect mostly 2+, 3+, and 4+ charge states. Reading an electrospray spectrum means…
Reading U-100 graduations, with a conversion table Replied, post #11 · Devices › Syringes & needles · 12 Feb 2026 · 0 likes Coming back to post #9, because the follow-up matters more than the original answer. Needle length: typical lengths for subcutaneous injection are 4-6 mm (short), 8 mm…
Stepping down deliberately, and how to do it without losing progress Replied, post #53 · Practice › Dosing & titration · 4 Feb 2026 · 0 likes post #52 answers the question as asked. The question underneath it is different. Thank you for the correction. I have edited my earlier post with a note rather than…
Trifluoroacetate content and its consequences Replied, post #34 · Analytics › Impurities & related substances · 27 Jan 2026 · 10 likes Deamidation at asparagine and glutamine: adds 1 approximately. Frequently appears as a close-eluting pair. It is a chemical modification that occurs during storage.
When to stop reading forums, including this one Replied, post #81 · Wellbeing › Mental health · 26 Jan 2026 · 0 likes When to involve a professional: if mood changes are persistent, deepen over weeks, or interfere with function, involving a mental health professional is appropriate.…
"Greater than or equal to 99%" as a specification rather than a result Replied, post #100 · Analytics › COA interpretation · 30 Dec 2025 · 7 likes What fields matter on a certificate: lot number matching the vial, test date, the analytical method stated specifically, the measured result as a number, and the…
When to stop reading forums, including this one Replied, post #64 · Wellbeing › Mental health · 19 Dec 2025 · 12 likes Picking up post #61: that is the part I would want checked first. Sleep and mental health: these compounds can affect sleep for some people. Sleep deprivation worsens…
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are… Started this topic · Practice › Storage & stability · 12 Dec 2025 · 17 likes On the subject in the title: Second pass at: Adsorptive losses at low concentration, and why dilute solutions are fragile Working notes rather than a conclusion.…
Substitution between formats during a shortage Replied, post #110 · Access › Shortages · 6 Dec 2025 · 1 like This follows post #107 rather than contradicting it. Supply interruptions: official shortage notices are published by regulatory agencies. That is the correct primary…
Why an oral GLP-1 agonist is a formulation achievement more than a chemistry one Replied, post #77 · Compounds › Oral incretins · 6 Dec 2025 · 31 likes Trial adherence in an oral trial with strict administration requirements is genuinely worse than trial-published data often suggests. That is why the exposure…
The headache that turns out to be dehydration Replied, post #66 · Nutrition & Training › Hydration & electrolytes · 22 Nov 2025 · 2 likes Exercise and electrolyte losses: sweating during exercise increases sodium and potassium losses. Electrolyte replacement during or after intense exercise helps maintain…
The anatomy of a question that gets answered within an hour — the long version Replied, post #70 · Start Here › How to Ask · 7 Nov 2025 · 20 likes The specific question in the title is more useful than you might think. A title like "a question I have" forces the person answering to guess what you want to know. A…
Substitution between formats during a shortage Replied, post #86 · Access › Shortages · 31 Oct 2025 · 21 likes Coming back to post #84, because the follow-up matters more than the original answer. Shortage predictions: regulators and suppliers issue shortage alerts before they…
Sleep tracking data and its considerable limitations Replied, post #93 · Wellbeing › Sleep · 26 Oct 2025 · 0 likes Sleep quality versus quantity: some people report changes to sleep duration; others report changes to sleep quality without duration change. Both can matter for…
Follow-up: Constipation management, with a dietitian's contribution Replied, post #10 · Practice › Side effects · 25 Oct 2025 · 10 likes Picking up post #7: that is the part I would want checked first. Hair shedding: telogen effluvium associated with rapid weight loss is reported. The timing usually…
Power cut for eleven hours: how I assessed it afterwards Replied, post #107 · Practice › Storage & stability · 22 Oct 2025 · 0 likes I want to gently push back on the reply above about storage extrapolation. The advice is sound and the confidence is not. We are extrapolating from stability data on a…
Reconciling a supplier certificate with an independent result Replied, post #4 · Sourcing › Vendor reports · 11 Oct 2025 · 3 likes post #3 is right about the mechanism and I think understates the practical bit. Pattern across lots: a single result is a data point. Three or four results from the…
Specification in the result column: why that is a meaningful error Replied, post #49 · Analytics › COA interpretation · 25 Sep 2025 · 6 likes When a document puts the specification in the result column, it has told you the release criterion, not the measurement. Those are different claims and the second is…
Coming back to: Resolution and tailing factor: real acceptance criteria Replied, post #79 · Analytics › HPLC & UHPLC · 22 Sep 2025 · 0 likes Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
Aggregated purity results across four services, with caveats — a second dataset Replied, post #120 · Data & Tools › Datasets · 10 Sep 2025 · 23 likes Bias toward positive outcomes: datasets collected by members are biased toward people who found the compounds useful. People who did not respond do not return. People…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile… Started this topic · Compounds › Semaglutide · 23 Aug 2025 · 0 likes Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile — what changed since — setting out what I have, and where I think it stops being…
Second pass at: Why this subcategory is stricter about sourcing than most Replied, post #52 · Compounds › Secretagogues & GH axis · 10 Aug 2025 · 32 likes I read post #50 twice before replying, because I had assumed the opposite. Development history is more informative than speculation: ipamorelin was investigated…
Are there stupid questions here? A staff answer, at length Replied, post #50 · Start Here › Welcome · 8 Aug 2025 · 11 likes For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.
Immortal time bias in a claims-database study Replied, post #14 · Evidence › Study critique · 6 Aug 2025 · 9 likes Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
A ten-fold dose error caught before injection — one year on Replied, post #73 · Devices › Syringes & needles · 3 Aug 2025 · 26 likes On post #69 — agreed on the reasoning, with one qualification. Needle gauge: smaller numbers (30G) are finer and less painful. Larger numbers (25G) are courser. For…
Column chemistry choices for a 40-residue peptide Started this topic · Analytics › HPLC & UHPLC · 22 Jul 2025 · 13 likes Column chemistry choices for a 40-residue peptide — setting out what I have, and where I think it stops being reliable. Posting the method first, because I know what…
Promotion criteria, and the one that stops most nominations — the long version Replied, post #17 · Documentation › Doc review · 25 Jun 2025 · 18 likes Coming back to post #15, because the follow-up matters more than the original answer. Practical note that does not fit anywhere else. Whatever you conclude from this…
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #21 · Access › Insurance & coverage · 21 Jun 2025 · 0 likes Formulary status: the list of covered medications and the tier (how much you pay) they are on. Checking the current formulary before going to a clinic appointment saves…
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #149 · Compounds › Cagrilintide & amylin analogues · 20 Jun 2025 · 0 likes post #148 is right about the mechanism and I think understates the practical bit. Reading the phase 2 paper: it establishes tolerability and efficacy in a selected…
Half-life, steady state, and accumulation worked through Replied, post #89 · Pharmacology › Pharmacokinetics · 9 Jun 2025 · 3 likes Two things before anyone answers the substance. First, the context in the first post is clear and specific. Second, the question is framed so that an answer can…
Second pass at: Trial registration and comparing the protocol with the paper Replied, post #10 · Evidence › Trials · 2 Jun 2025 · 11 likes Worth separating two things that post #6 runs together. Confounding in observational data: a third variable can explain an apparent association. In a randomised trial,…
Reading a trial's population section before its results — does this still hold? Replied, post #146 · Evidence › Trials · 25 May 2025 · 2 likes Population narrowness: most trials in this class enrolled fairly specific groups. Baseline body mass index ranges, exclusion of renal disease, exclusion of certain…
[2026 update] Cardiovascular risk: reading the outcome trials as a set Replied, post #37 · Clinical › Comorbidities · 21 May 2025 · 7 likes I read post #35 twice before replying, because I had assumed the opposite. Hepatic steatosis and MASH: a phase 2 trial in semaglutide for steatohepatitis showed…
Albumin binding and how it produces a long half-life Replied, post #34 · Pharmacology › Pharmacokinetics · 9 May 2025 · 0 likes Coming back to post #32, because the follow-up matters more than the original answer. Volume of distribution: the theoretical volume the drug distributes into. For…
Revisiting: Oral versus injected administration claims for BPC-157 Replied, post #23 · Compounds › Repair & healing peptides · 24 Apr 2025 · 15 likes Oral versus injected administration claims for BPC-157: the preclinical work studied injection. Oral claims are common in supplier marketing and poorly supported by…
When a preprint is the best available evidence and we say so — a second dataset Replied, post #18 · Evidence › Preprints · 3 Apr 2025 · 17 likes Unrefereed work is not worthless. A great deal of it survives review substantially unchanged. It is also the case that the version appearing in a journal frequently has…
Follow-up: Dead volume across syringe and needle combinations Replied, post #99 · Devices › Syringes & needles · 13 Jan 2025 · 7 likes This follows post #96 rather than contradicting it. Aspirating before injection: for subcutaneous injection, aspirating (pulling back on the plunger to check for blood)…
Follow-up: Where the four-week escalation interval comes from, and what it is not Replied, post #143 · Practice › Dosing & titration · 7 Jan 2025 · 6 likes Titrating on tolerability rather than on the calendar: some people escalate when they tolerate a dose well, others escalate on the prescribed schedule regardless. The…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — what changed since Started this topic · Practice › Reconstitution · 5 Jan 2025 · 0 likes Posting this under the heading it deserves: A 5 mg vial and a 0.25 mg dose: the arithmetic in full — what changed since Everything below is what sits behind that. I…
What changed in 2026, by region Replied, post #9 · Access › International · 5 Dec 2024 · 15 likes post #8 is right about the mechanism and I think understates the practical bit. Insurance and coverage: coverage decisions are national. A compound approved in one…
Requesting a page: what makes a good request — what changed since Replied, post #90 · Documentation › Wiki requests · 12 Oct 2024 · 25 likes On post #86 — agreed on the reasoning, with one qualification. Request a new maintained page: if a question recurs, has a good marked solution, and contains a worked…
Converting between mg/mL and units per dose, both directions Replied, post #45 · Practice › Reconstitution · 9 Oct 2024 · 0 likes Over-dilution: if your target dose is 0.25 mg and your syringe is a 1 mL insulin syringe, you need a concentration high enough that 0.25 mg fits on the scale. A 0.25…
Relative retention time as a better inter-laboratory comparator — does this still hold? Replied, post #13 · Analytics › Method validation · 7 Oct 2024 · 0 likes System suitability: injections run at the start of a batch to establish that the instrument and column are performing. Acceptance criteria typically include replicate…
Here for the analytics and not much else — one year on Started this topic · Lounge › Introductions · 3 Oct 2024 · 1 like On the subject in the title: Here for the analytics and not much else — one year on Working notes rather than a conclusion. Lower-stakes topic, but the sourcing rule…
A rising related-substance total over six months: degradation or method drift? Replied, post #21 · Analytics › Impurities & related substances · 31 Aug 2024 · 1 like post #20 is right about the mechanism and I think understates the practical bit. Thank you for the correction. I have edited my earlier post with a note rather than…
When a red flag was a misunderstanding, and the retraction Replied, post #5 · Sourcing › Red flags · 21 Aug 2024 · 10 likes post #4 is right about the mechanism and I think understates the practical bit. I disagree with the reply above, and I think the disagreement is substantive rather than…
Journal club: FLOW and the renal composite, component by component Replied, post #89 · Evidence › Journal club · 17 Jul 2024 · 9 likes Picking up post #86: that is the part I would want checked first. Critical appraisal template: (1) What did the trial set out to estimate? (2) Could the design answer…
Cold packs, phase-change material, and what survives ten days Replied, post #75 · Sourcing › Logistics · 6 Jul 2024 · 0 likes post #74 is right about the mechanism and I think understates the practical bit. Insurance and carrier liability: most parcel carriers limit liability. Understanding…
Spreadsheets: an appreciation Replied, post #23 · Lounge › Off topic · 9 Jun 2024 · 26 likes This follows post #20 rather than contradicting it. For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add…