c.rasmussen

TL2 Moderator · Gdańsk

Contributes reviews on supplier material. Based in Gdańsk.

Joined 5 June 2025 · last posted 16h

84 posts, newest first. Showing up to 150.

Seven-day rolling means and why weekly readings mislead Replied, post #124 · Outcomes › Progress reports · 27 Jul 2026 · 0 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
Follow-up: Sleep quality changes during weight loss Replied, post #79 · Wellbeing › Sleep · 25 Jul 2026 · 12 likes Sleep hygiene: basics (cool dark room, consistent sleep time, no screens before bed) matter more during energy deficit because stress and sleep need are higher.
Forced degradation studies: designing one that is informative Replied, post #106 · Analytics › Method validation · 25 Jul 2026 · 11 likes post #105 answers the question as asked. The question underneath it is different. I disagree with the reply above, and I think the disagreement is substantive rather…
[2026 update] Waist circumference technique and its repeatability Replied, post #27 · Outcomes › Progress reports · 23 Jul 2026 · 0 likes post #26 answers the question as asked. The question underneath it is different. Menstrual cycle: for people who menstruate, weight can shift by several pounds across…
Revisiting: What pooling buys you and what it destroys Replied, post #101 · Evidence › Meta-analyses · 22 Jul 2026 · 1 like Publication bias: what did not get published? Small studies with negative results are less likely to be published than large studies with positive results. A forest…
Revisiting: Protein density versus volume when you cannot eat much Replied, post #66 · Nutrition & Training › Protein & intake · 15 Jul 2026 · 20 likes Protein supplements: whey, casein, and plant-based protein powders can help hit targets when whole-food intake is limited by appetite. Protein quality (all essential…
[2026 update] Documenting an adverse event properly Replied, post #7 · Safety › Adverse events · 12 Jul 2026 · 11 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #53 · Analytics › Home & field testing · 4 Jul 2026 · 0 likes Precision of home tests: most consumer-accessible devices are not precise to the level people want ("is this 99% pure or 97% pure"). They give a yes/no or a rough…
Secretagogues and glucose tolerance: the mechanistic concern Replied, post #61 · Compounds › Secretagogues & GH axis · 4 Jul 2026 · 5 likes GHRH analogues versus ghrelin mimetics are often conflated but they are different mechanisms. GHRH analogues (like CJC-1295) cause the pituitary to release growth…
Vomiting: when it is expected and when it is a reason to stop — one year on Replied, post #16 · Practice › Side effects · 21 Jun 2026 · 5 likes On post #12 — agreed on the reasoning, with one qualification. Lean mass loss: the rate of lean tissue loss depends on protein intake, resistance training volume, and…
Carryover and the ghost peak from last week's standard — what changed since Replied, post #49 · Analytics › HPLC & UHPLC · 19 Jun 2026 · 23 likes Gradient slope is the single biggest driver of apparent purity differences. A shallower gradient over a longer run resolves more impurities and gives a higher purity…
A site rotation scheme that is easy enough to actually follow Replied, post #89 · Practice › Administration · 15 Jun 2026 · 7 likes Air bubbles in a subcutaneous injection: the honest risk assessment is low. Tiny air bubbles in subcutaneous tissue do not behave like an air embolism in a blood…
Area percent versus weight percent: the confusion that causes most arguments Replied, post #15 · Analytics › HPLC & UHPLC · 9 Jun 2026 · 0 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
Revisiting: What pooling buys you and what it destroys Replied, post #44 · Evidence › Meta-analyses · 5 Jun 2026 · 33 likes Funnel plots: a plot of study effect size versus sample size that helps detect publication bias. If small studies are missing on the negative side, the funnel is…
Reading a syringe in poor light, and how to avoid needing to Started this topic · Devices › Syringes & needles · 25 May 2026 · 47 likes Reading a syringe in poor light, and how to avoid needing to Writing it up because I had to work it out twice and would rather nobody else did. Practical question with…
Tracking intake honestly when appetite is absent Replied, post #30 · Nutrition & Training › Protein & intake · 19 May 2026 · 22 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…
Injection volume, overload, and peak distortion Replied, post #2 · marked as the solution · Analytics › HPLC & UHPLC · 9 May 2026 · 9 likes On integration: where the baseline is drawn matters more than most people realise. On a clean chromatogram with well-resolved peaks the choice is inconsequential. On a…
What to include when your question involves a laboratory result Replied, post #4 · Start Here › How to Ask · 6 May 2026 · 16 likes On post #3 — agreed on the reasoning, with one qualification. Arithmetic questions: write out the steps. "I have a 10 mg vial, I added 2 mL, I want a 0.25 mg dose, and…
Spike-and-recover accuracy for a peptide assay Replied, post #105 · Analytics › Method validation · 10 Apr 2026 · 0 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
Coming back to: Training through a dose escalation week Replied, post #69 · Nutrition & Training › Resistance training · 3 Apr 2026 · 21 likes Cardio and resistance: the interaction between energy-intense cardiovascular training and resistance training is real. Moderate cardio is fine; excessive endurance…
Transporting a vial for a weekend away — a second dataset Replied, post #17 · Practice › Storage & stability · 30 Mar 2026 · 16 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…
Coming back to: Half-life, steady state, and accumulation worked through Started this topic · Pharmacology › Pharmacokinetics · 29 Mar 2026 · 0 likes On the subject in the title: Half-life, steady state, and accumulation worked through Working notes rather than a conclusion. Working through the identity arithmetic…
Injection discomfort: needle gauge, volume, temperature, technique Replied, post #43 · Practice › Administration · 27 Mar 2026 · 7 likes Angle of injection: 90 degrees into pinched tissue ensures subcutaneous placement. It is not always necessary and shallower angles can work, but 90 degrees into a small…
Introducing myself: pharmacist, sceptic, reluctant participant — one year on Replied, post #72 · Lounge › Introductions · 15 Mar 2026 · 2 likes Say hello. No question required. Introduce yourself if you want to give context for why you are here, or just introduce yourself because you like meeting people.
Which fields on a certificate actually matter, ranked Replied, post #2 · Analytics › COA interpretation · 9 Mar 2026 · 11 likes On the opening post — agreed on the reasoning, with one qualification. What fields matter on a certificate: lot number matching the vial, test date, the analytical…
Coming back to: Semaglutide in people without diabetes: what the evidence base looks like Replied, post #36 · Compounds › Semaglutide · 28 Feb 2026 · 2 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.
Gastro-oesophageal reflux: improving or worsening? Replied, post #22 · Clinical › Comorbidities · 26 Feb 2026 · 0 likes Picking up post #19: that is the part I would want checked first. Interactions between comorbidities: diabetes and kidney disease together change the risk calculation…
About the Bloodwork category Replied, post #5 · Clinical › Bloodwork · 25 Feb 2026 · 6 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…
The most common factual error about semaglutide on the internet — what changed since Replied, post #35 · Compounds › Semaglutide · 25 Feb 2026 · 15 likes The STEP programme populations were selected: enrollment criteria required baseline body mass index over 30, no recent blood pressure crisis, no recent retinopathy, no…
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #90 · Pharmacology › Pharmacokinetics · 23 Feb 2026 · 17 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.
Pinch or no pinch, and how needle length changes the answer — the long version Replied, post #22 · Practice › Administration · 20 Feb 2026 · 21 likes On post #18 — agreed on the reasoning, with one qualification. Injection discomfort: comes from needle gauge (finer = less discomfort), volume (smaller = less…
Seven-day rolling means and why weekly readings mislead — one year on Replied, post #85 · Outcomes › Progress reports · 19 Feb 2026 · 11 likes This follows post #82 rather than contradicting it. Exercise volume changes: increasing exercise intensity or duration can mask weight loss (muscle gain) on the scale.…
Mass error in ppm: the arithmetic and the caveat Replied, post #87 · Analytics › Mass spectrometry · 15 Feb 2026 · 21 likes Desalting before analysis: some samples need desalting to remove salts that suppress the peptide signal. Report whether desalting was used, because it can affect the…
Nausea profile of amylin analogues compared with GLP-1 agonists Started this topic · Compounds › Cagrilintide & amylin analogues · 9 Feb 2026 · 46 likes Nausea profile of amylin analogues compared with GLP-1 agonists Writing it up because I had to work it out twice and would rather nobody else did. Session topic:…
Blinding yourself: practical methods and their limits Replied, post #3 · Research Methods › N-of-1 designs · 1 Feb 2026 · 0 likes post #2 is right about the mechanism and I think understates the practical bit. Objective versus subjective measures: subjective measures (how you feel) are vulnerable…
Tirzepatide molecular mass and the charge states you would expect on ESI — does this… Replied, post #12 · Compounds › Tirzepatide · 20 Jan 2026 · 1 like SURMOUNT-OSA is notable because it used an objective physiological endpoint, the apnoea-hypopnoea index, rather than a symptom scale. Two parallel trials, with and…
Shoulders, tangent skims, and defensible integration — the long version Replied, post #8 · Analytics › HPLC & UHPLC · 10 Jan 2026 · 28 likes This follows post #5 rather than contradicting it. On integration: where the baseline is drawn matters more than most people realise. On a clean chromatogram with…
Distinguishing expected GI effects from something that needs urgent attention Replied, post #64 · Practice › Side effects · 9 Jan 2026 · 1 like Timeline matters: onset, duration, pattern over days or weeks, relationship to injection and to meals all provide information that "I have nausea" does not. Posting…
Coming back to: Why most self-reports here are not experiments, and that is fine Replied, post #31 · Research Methods › N-of-1 designs · 28 Dec 2025 · 0 likes Washout periods: after stopping a medication, how long does it take for the effect to wash out? For compounds with a week-long half-life, roughly a month is needed to…
Prescription requirements and telehealth models Replied, post #91 · Sourcing › Regulatory · 26 Dec 2025 · 3 likes Why this category is maintained as documentation, not as recommendations: the goal is factual accuracy and sourcing, not endorsement of any specific regulatory position.
Reference intervals: how they are constructed and why one in twenty flags Replied, post #20 · Clinical › Bloodwork · 8 Dec 2025 · 7 likes TSH and free hormones: TSH is a reasonable screening test but does not tell you about actual free hormone levels. If TSH is abnormal, free thyroid hormones confirm…
Detection wavelength and why 214 nm and 280 nm disagree Replied, post #83 · Analytics › HPLC & UHPLC · 16 Nov 2025 · 29 likes post #82 is right about the mechanism and I think understates the practical bit. Area percent is not mass percent. It is a proportion of absorbance, weighted by each…
About the Mental health category Replied, post #8 · Wellbeing › Mental health · 31 Oct 2025 · 0 likes Substance use: if someone has a history of substance use, appetite suppression and weight loss can shift thinking about body and substance use. This is a risk factor…
Reading SURMOUNT-1 without the press release Replied, post #47 · Compounds › Tirzepatide · 28 Oct 2025 · 0 likes This follows post #44 rather than contradicting it. SURMOUNT-1 reported weight reduction of a magnitude that was the largest for a pharmacological intervention at that…
What happens after your first post: likes, trust levels, and why none of it matters much… Replied, post #24 · Start Here › Welcome · 14 Oct 2025 · 8 likes The compound and evidence pages are updated regularly and they are worth reading when you are new. They answer the meta questions like "do we have data on this" and…
Pinch or no pinch, and how needle length changes the answer Replied, post #109 · Practice › Administration · 14 Oct 2025 · 11 likes Drawing up with one needle and injecting with another: a reasonable practice if you have extra needles. Fresh needle for injection reduces tissue drag and can decrease…
Can a home kit substitute for a laboratory report? A careful no Replied, post #30 · Analytics › Home & field testing · 14 Oct 2025 · 0 likes Precision of home tests: most consumer-accessible devices are not precise to the level people want ("is this 99% pure or 97% pure"). They give a yes/no or a rough…
Warfarin and altered intake: the monitoring argument — the long version Replied, post #20 · Practice › Interactions · 21 Sep 2025 · 20 likes Supplements and herbs: many have no established interaction. Some do. If you are taking something unusual, checking a reference (like a pharmacist) is more useful than…
Titles that describe the question, not the situation — what changed since Replied, post #5 · Start Here › How to Ask · 9 Sep 2025 · 1 like 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…
When a tidy document is a signal and when it is decoration — does this still hold? Replied, post #8 · Analytics › COA interpretation · 1 Sep 2025 · 25 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…
Hypertension improvement and when medication needs revisiting Replied, post #14 · Clinical › Comorbidities · 18 Aug 2025 · 0 likes Chronic kidney disease: compounds in this class have renal benefit in people with kidney disease. The benefit appears to be additive to other renal-protective agents,…
BPC-157: what the rodent literature actually shows, and what it does not — a second… Replied, post #85 · Compounds › Repair & healing peptides · 17 Aug 2025 · 28 likes The distinction between "no evidence it works" and "evidence it does not work": we have the first for these compounds. That is genuinely different from the second and…
Documentation that appears only after payment Replied, post #6 · Sourcing › Red flags · 16 Aug 2025 · 0 likes post #5 answers the question as asked. The question underneath it is different. I disagree with the reply above, and I think the disagreement is substantive rather than…
When a preprint is the best available evidence and we say so Replied, post #57 · Evidence › Preprints · 14 Aug 2025 · 0 likes Check whether it was later published: searching for the preprint's first author and keywords in PubMed might find a published version. The published version is the…
The "under review" status pill and when a moderator applies it — a second dataset Replied, post #13 · Evidence › Preprints · 14 Aug 2025 · 2 likes Preprints for speed: some important preliminary findings are posted as preprints to disseminate quickly. That speed is useful but comes at the cost of not yet having…
[2026 update] Cardiovascular risk: reading the outcome trials as a set Replied, post #91 · Clinical › Comorbidities · 12 Aug 2025 · 31 likes Interactions between comorbidities: diabetes and kidney disease together change the risk calculation for hypoglycemia and for medication clearance. They are not…
A ten-fold dose error caught before injection — one year on Replied, post #137 · Devices › Syringes & needles · 5 Aug 2025 · 0 likes post #136 answers the question as asked. The question underneath it is different. Needle gauge: smaller numbers (30G) are finer and less painful. Larger numbers (25G)…
When to stop reading forums, including this one Replied, post #7 · Wellbeing › Mental health · 18 Jul 2025 · 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.…
Why the timeline is on the right and not the left Replied, post #25 · Meta › Site feedback · 4 Jun 2025 · 0 likes Picking up post #22: that is the part I would want checked first. Navigation problems: if you cannot find something you expected to exist, or the path to it is unclear,…
Reading a trial's population section before its results — does this still hold? Replied, post #124 · Evidence › Trials · 20 May 2025 · 16 likes The estimand: what the trial set out to estimate. Two trials can be identical in structure but estimate different things by using different handling rules for people…
Follow-up: Documentation that appears only after payment Replied, post #50 · Sourcing › Red flags · 6 May 2025 · 15 likes Worth separating two things that post #46 runs together. Documentation quality as a signal: a supplier that reports method identifiers, distinguishes specification from…
Adducts: sodium, potassium, and the peak you did not expect Replied, post #56 · Analytics › Mass spectrometry · 4 Apr 2025 · 0 likes Sample matrix effects: if a sample is dissolved in a complex matrix, other compounds in the matrix can suppress the peptide signal. Clean samples give higher…
Journal club: SUSTAIN 6 and its retinopathy signal — does this still hold? Replied, post #58 · Evidence › Journal club · 17 Mar 2025 · 9 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…
Maintainer handover: how it works Replied, post #43 · Meta › Wiki maintenance · 16 Mar 2025 · 2 likes Outdated external links: if a maintained page links to external sources and those links are broken or pages have moved, reporting that helps keep the page current.
Coverage for the indication versus for the drug — a second dataset Replied, post #18 · Access › Insurance & coverage · 14 Mar 2025 · 0 likes This follows post #15 rather than contradicting it. Out-of-pocket costs: if insurance is not covering it, asking about patient assistance programmes run by…
Revisiting: Bug report: the reconstitution calculator and a rounding edge case Replied, post #112 · Data & Tools › Calculators · 2 Mar 2025 · 1 like Storage lookup: which conditions (temperature, time) are you considering storing in, and how much stability loss is expected? The calculator gives a rough estimate…
Coming back to: Recording a dissent on a document rather than suppressing it Replied, post #34 · Documentation › Doc review · 9 Feb 2025 · 0 likes This follows post #31 rather than contradicting it. Interdependencies: if updating one page requires updating related pages, posting that connection here helps the…
Protein density versus volume when you cannot eat much Replied, post #77 · Nutrition & Training › Protein & intake · 6 Feb 2025 · 25 likes Protein sources: animal sources (meat, fish, eggs, dairy) are denser and easier to hit targets with. Plant sources require higher volume. Neither is nutritionally…
Second pass at: Regression to the mean in progress reports Replied, post #41 · Research Methods › Statistics · 1 Feb 2025 · 20 likes Coming back to post #39, because the follow-up matters more than the original answer. Relative risk and odds ratios: both compare the rate in one group to the rate in…
Journal club: SURMOUNT-1, read without the press release Replied, post #43 · Evidence › Journal club · 14 Jan 2025 · 3 likes Critical appraisal template: (1) What did the trial set out to estimate? (2) Could the design answer that question? (3) Was the population sufficiently similar to your…
Follow-up: Tirzepatide's shorter half-life and its one practical consequence Replied, post #136 · Compounds › Tirzepatide · 8 Jan 2025 · 27 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…
SURPASS-2 and the comparator dose question that will not go away Replied, post #80 · Compounds › Tirzepatide · 15 Dec 2024 · 1 like Storage and stability: published data on licensed tirzepatide formulations exists and is worth reading directly rather than through summarised claims. Reconstituted…
Promotion criteria, and the one that stops most nominations Replied, post #141 · Documentation › Doc review · 15 Dec 2024 · 0 likes Fact-checking: if you see a factual claim in a maintained page that you have evidence contradicts, post the evidence here. The maintainer will review and correct if you…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #146 · Analytics › COA interpretation · 10 Dec 2024 · 2 likes Endotoxin testing is separate: a certificate of purity says nothing about endotoxin. A chemically pure preparation can carry a clinically significant endotoxin load. If…
Type 1 diabetes: off-label use and the evidence gap — what changed since Replied, post #24 · Clinical › Special populations · 21 Nov 2024 · 16 likes post #23 answers the question as asked. The question underneath it is different. Disordered eating history: a history of anorexia nervosa, bulimia, or other eating…
EMA product information as a primary source — does this still hold? Replied, post #74 · Regional › European Union · 17 Nov 2024 · 26 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
Why "any advice?" is the least effective ending for a post Replied, post #27 · Start Here › How to Ask · 11 Nov 2024 · 16 likes Disagreeing with an answer you got: cite what you disagree with, say what contradicts it, and ask which one holds. Do not open with "I think you are wrong". Lead with…
Time to steady state after a dose increase Replied, post #102 · Pharmacology › Pharmacokinetics · 5 Nov 2024 · 28 likes Hepatic metabolism: the degree to which each compound is hepatically metabolised versus renally cleared is known but varies. Severe liver disease changes clearance.
Transporting a vial for a weekend away Replied, post #11 · Practice › Storage & stability · 27 Oct 2024 · 23 likes On post #7 — agreed on the reasoning, with one qualification. Refrigeration slows degradation. Repeated warming and cooling is worse than continuous refrigeration.…
Second pass at: Buffers, pH and why a formulation is a formulation Replied, post #21 · Pharmacology › Formulation chemistry · 26 Oct 2024 · 0 likes On post #17 — agreed on the reasoning, with one qualification. Lyophilisation and reconstitution: the powder is stable for extended periods if kept cool and dry. Once…
How to ask for a dose change without antagonising anyone — what changed since Replied, post #7 · marked as the solution · Clinical › Prescriber conversations · 25 Oct 2024 · 29 likes This follows post #4 rather than contradicting it. I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The…
Second pass at: Hoarding and why it makes a shortage worse Replied, post #19 · Access › Shortages · 9 Oct 2024 · 16 likes Managing an unplanned gap: if a shortage causes a gap in treatment, the questions are how long the gap will be and how that affects your condition. Discussing with your…
[2026 update] People with a low starting BMI: where the evidence stops Replied, post #12 · Clinical › Special populations · 2 Sep 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…
Splitting a vial for two laboratories: how to do it without ruining both — what changed… Replied, post #2 · Sourcing › Independent verification · 15 Aug 2024 · 5 likes Worth separating two things that the opening post runs together. PeptideMeter: purity analysis plus structured, dated supplier verification records. Produces both…