m.rasmussen

TL2 Moderator · Kraków

Contributes reviews on supplier material. Based in Kraków.

Joined 10 July 2025 · last posted 1h

78 posts, newest first. Showing up to 150.

Language barriers in accessing a prescription abroad Replied, post #3 · Access › International · 28 Jul 2026 · 2 likes Currency and exchange rates: paying in different currencies has different costs and risks. Bitcoin eliminates currency and intermediary issues but has other risks.
The anatomy of a question that gets answered within an hour Replied, post #128 · Start Here › How to Ask · 27 Jul 2026 · 4 likes Coming back to post #126, because the follow-up matters more than the original answer. Practical note that does not fit anywhere else. Whatever you conclude from this…
What is genuinely unknown about long-term amylin agonism Replied, post #35 · Compounds › Cagrilintide & amylin analogues · 14 Jul 2026 · 2 likes Worth separating two things that post #31 runs together. Reading the phase 2 paper: it establishes tolerability and efficacy in a selected population on a defined dose…
Heart failure with preserved ejection fraction: symptom endpoints Replied, post #20 · Clinical › Comorbidities · 11 Jul 2026 · 3 likes Interactions between comorbidities: diabetes and kidney disease together change the risk calculation for hypoglycemia and for medication clearance. They are not…
Impurity thresholds: where the common numbers come from Started this topic · Analytics › Impurities & related substances · 8 Jul 2026 · 42 likes Impurity thresholds: where the common numbers come from — setting out what I have, and where I think it stops being reliable. A documentation question rather than an…
An 18-month record including the parts that went badly Replied, post #57 · Outcomes › Progress reports · 2 Jul 2026 · 12 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…
Spreadsheets: an appreciation — what changed since Replied, post #84 · Lounge › Off topic · 28 Jun 2026 · 15 likes Industry and supply chain: post about manufacturing, pharmaceutical economics, or market dynamics if you have something substantive to contribute.
Why we ask for units every single time, with three examples of what goes wrong Replied, post #78 · Start Here › How to Ask · 28 Jun 2026 · 5 likes Picking up post #75: that is the part I would want checked first. Units. Everything needs units. This is why we ask every single time. I have seen the same arithmetic…
Muscle cramps: the ordinary causes before the exotic ones — a second dataset Replied, post #17 · Practice › Side effects · 27 Jun 2026 · 0 likes Worth separating two things that post #13 runs together. Pancreatitis: a rare but serious event with a specific presentation (epigastric pain, back pain, elevated…
[2026 update] Travelling with an injectable: documentation and practicalities Replied, post #34 · Access › International · 24 Jun 2026 · 0 likes Worth separating two things that post #30 runs together. Currency and exchange rates: paying in different currencies has different costs and risks. Bitcoin eliminates…
The headache that turns out to be dehydration — the long version Replied, post #55 · Nutrition & Training › Hydration & electrolytes · 23 Jun 2026 · 28 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…
Muscle cramps: the ordinary causes before the exotic ones — a second dataset Replied, post #7 · Practice › Side effects · 21 Jun 2026 · 0 likes This follows post #4 rather than contradicting it. Injection site reaction: local erythema, nodules, or induration at injection sites is reported by some people. Site…
Follow-up: Prior authorisation: what the criteria usually require Replied, post #13 · Access › Insurance & coverage · 9 Jun 2026 · 8 likes Appeals process: unemotional prose, the criterion quoted verbatim, evidence mapped to it point by point, dates, and nothing else. Describing how the decision affected…
Reused chromatograms across lots: how to spot it Replied, post #46 · Analytics › COA interpretation · 2 Jun 2026 · 8 likes Coming back to post #44, because the follow-up matters more than the original answer. Amino acid analysis gives content: it hydrolyses the peptide and quantifies the…
Designing a personal experiment that could change your mind — one year on Replied, post #54 · Research Methods › N-of-1 designs · 1 Jun 2026 · 0 likes Sample size in n-of-1: you are the sample. Repeated measurements (weekly weighings, daily mood scores) increase the power to detect a real effect even though n=1.
Follow-up: A parcel that arrived warm: a decision process, not a verdict Replied, post #49 · Practice › Storage & stability · 30 May 2026 · 31 likes post #48 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…
0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #56 · Devices › Syringes & needles · 30 May 2026 · 30 likes Fixed versus detachable needles: insulin syringes usually have fixed needles (no dead volume loss to the hub). Luer-lock syringes use detachable needles (more dead…
[2026 update] A vial that will not fully dissolve: what to check and in what order Replied, post #70 · Practice › Reconstitution · 24 May 2026 · 4 likes I read post #68 twice before replying, because I had assumed the opposite. Two things before anyone answers the substance. First, the context in the first post is clear…
Batch numbers that do not match the vial label — what changed since Replied, post #16 · Sourcing › Red flags · 18 May 2026 · 0 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…
[2026 update] Charge states for a 4 kDa peptide, worked through Replied, post #92 · Analytics › Mass spectrometry · 18 Apr 2026 · 16 likes Calibration matters: a high-resolution instrument out of calibration can report mass with ppm error large enough to be uninformative. Check when the instrument was last…
[2026 update] Thyroid function tests during substantial weight change Replied, post #42 · Clinical › Bloodwork · 17 Apr 2026 · 6 likes Picking up post #39: that is the part I would want checked first. Fasting state: some lab tests require fasting; others do not. Lipids on a fasting draw differ from…
Second pass at: Metformin co-administration and additive GI effects Replied, post #85 · Practice › Interactions · 14 Apr 2026 · 19 likes Picking up post #82: that is the part I would want checked first. Vitamins: most vitamins have no significant interaction. Fat-soluble vitamins (A, D, E, K) might be…
[2026 update] Charge states for a 4 kDa peptide, worked through Replied, post #73 · Analytics › Mass spectrometry · 11 Apr 2026 · 18 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.
Coming back to: Time to steady state after a dose increase Replied, post #27 · Pharmacology › Pharmacokinetics · 6 Apr 2026 · 9 likes Accumulation at steady state: with a week-long half-life, steady-state concentration is reached around 4 to 5 half-lives (about 4 to 5 weeks). Before that,…
Dizziness on standing and the electrolyte explanation — does this still hold? Replied, post #64 · Practice › Side effects · 3 Apr 2026 · 16 likes post #63 is right about the mechanism and I think understates the practical bit. Hair shedding: telogen effluvium associated with rapid weight loss is reported. The…
Chain of custody for a sample you posted yourself Started this topic · Sourcing › Independent verification · 21 Mar 2026 · 18 likes Chain of custody for a sample you posted yourself Writing it up because I had to work it out twice and would rather nobody else did. A logistics question, since the…
Choosing which test to pay for, given a fixed budget Replied, post #29 · Sourcing › Independent verification · 18 Mar 2026 · 11 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…
Second pass at: Identical chromatograms across two different lots Replied, post #72 · Sourcing › Red flags · 17 Mar 2026 · 5 likes Inconsistency across documents: a certificate stating one purity, a website claiming another, and a supplier's verbal representation claiming a third, all on the same…
Reading a preclinical wound-healing model and its relevance to a human tendon — a second… Replied, post #58 · Compounds › Repair & healing peptides · 14 Mar 2026 · 6 likes On post #54 — agreed on the reasoning, with one qualification. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what…
Second pass at: What "verified" means on our vendor pages, stated narrowly Replied, post #79 · Sourcing › Vendor reports · 9 Mar 2026 · 29 likes Pattern across lots: a single result is a data point. Three or four results from the same supplier showing a consistent pattern becomes a record worth discussing. Two…
Pharmacy supply in the UK and the questions you will be asked Replied, post #65 · Regional › UK & Ireland · 6 Mar 2026 · 4 likes post #64 is right about the mechanism and I think understates the practical bit. Importing for personal use: importing a prescription-only medicine without a…
Measurement error in a self-reported exposure Replied, post #23 · Evidence › Study critique · 22 Feb 2026 · 0 likes Building consensus on which criticisms matter: if everyone agrees that the sample size is small but only you think that affects the conclusion, maybe your criticism is…
Why one laboratory's 98.4% and another's 96.1% may not contradict — one year on Replied, post #4 · Analytics › Method validation · 16 Feb 2026 · 13 likes Worth separating two things that the opening post runs together. Two things before anyone answers the substance. First, the context in the first post is clear and…
A single out-of-range value on an otherwise normal panel Replied, post #9 · Clinical › Bloodwork · 29 Jan 2026 · 0 likes post #8 is right about the mechanism and I think understates the practical bit. TSH and free hormones: TSH is a reasonable screening test but does not tell you about…
A partial dose because the pen emptied mid-injection Replied, post #17 · Practice › Administration · 7 Jan 2026 · 8 likes Injecting into an area that has become firm: lipohypertrophy — thickened fatty tissue from repeated injection in one area — changes local tissue absorption. Avoid…
Coming back to: Payment mechanics and the recovery options that do not exist Replied, post #11 · Sourcing › Payments · 6 Jan 2026 · 1 like Documentation and tax implications: payments you make for compounds might have implications for tax reporting depending on your jurisdiction. Keeping clear records…
Mood changes: monitoring, and when to involve a professional — what changed since Replied, post #4 · Wellbeing › Mental health · 31 Dec 2025 · 0 likes This follows the opening post rather than contradicting it. For anyone arriving from a search: the marked solution above is the direct answer, and the replies…
[2026 update] How much of the diluent volume the powder itself displaces Replied, post #88 · Practice › Reconstitution · 26 Nov 2025 · 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…
Run-in periods and the population they select Replied, post #25 · Evidence › Trials · 22 Nov 2025 · 0 likes post #24 is right about the mechanism and I think understates the practical bit. Surrogate endpoints: an endpoint that is not the outcome that matters but is measured…
DXA precision and the least significant change for lean mass Replied, post #8 · Outcomes › Body composition · 19 Nov 2025 · 26 likes Resting metabolic rate: body composition affects metabolic rate. As fat mass decreases and lean mass is maintained, metabolic rate is usually maintained better than…
Pharmaceutical compounding rules, summarised from primary sources — a second dataset Replied, post #6 · Sourcing › Regulatory · 28 Oct 2025 · 7 likes Approval versus licensing: a compound can be approved for a specific indication in one country and not approved at all in another. Tracking jurisdictional approval is…
Sleep tracking data and its considerable limitations Replied, post #106 · Wellbeing › Sleep · 27 Oct 2025 · 0 likes Apnoea monitoring: if you have diagnosed or suspected sleep apnoea, periodic monitoring (annually) during weight loss is prudent because severity changes.
Where the integrator drew the baseline, and how much it moved the number Replied, post #8 · Analytics › HPLC & UHPLC · 15 Sep 2025 · 23 likes Column chemistry and particle size: smaller particles (1.7 μm) give better resolution and higher efficiency than larger particles (3.5 μm or 5 μm), at the cost of…
Substitution between formats during a shortage Replied, post #57 · Access › Shortages · 15 Sep 2025 · 5 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…
Titles that describe the question, not the situation Replied, post #77 · Start Here › How to Ask · 22 Aug 2025 · 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…
A preprint whose numbers changed substantially at publication Replied, post #16 · Evidence › Preprints · 11 Aug 2025 · 0 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…
Persistent vomiting and the threshold for seeking help Replied, post #16 · Safety › Adverse events · 9 Aug 2025 · 24 likes How to document: date, exact symptom or event, severity, duration, outcome, any medical attention sought. Detailed documentation is far more useful than a vague report.
BPC-157: what the rodent literature actually shows, and what it does not Replied, post #25 · Compounds › Repair & healing peptides · 31 Jul 2025 · 27 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…
Analytical identity of BPC-157: a 15-mer with a simple mass Started this topic · Compounds › Repair & healing peptides · 27 Jul 2025 · 18 likes Analytical identity of BPC-157: a 15-mer with a simple mass Writing it up because I had to work it out twice and would rather nobody else did. Comparing SURMOUNT-OSA (…
AOD-9604 and the fragment hypothesis, revisited Replied, post #4 · Compounds › Other compounds · 16 Jul 2025 · 27 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…
Second pass at: Journal club: STEP 4 and what a withdrawal design can prove Replied, post #37 · Evidence › Journal club · 6 Jul 2025 · 0 likes PIONEER 6 (N Engl J Med 2019): Cardiovascular safety trial for oral semaglutide, not efficacy. Non-inferiority for safety was met. The trial was not designed to…
Temperature loggers worth the money — the long version Replied, post #4 · Devices › Cold chain · 23 Jun 2025 · 3 likes Assessing an excursion: if a package sat at room temperature for a time, visual inspection (cloudiness, discoloration, particles) can alert you to problems. Not visible…
Follow-up: Tracking intake honestly when appetite is absent Replied, post #98 · Nutrition & Training › Protein & intake · 15 Jun 2025 · 10 likes Coming back to post #96, because the follow-up matters more than the original answer. Protein targets during weight loss: the standard recommendation is 1.6 to 2.2…
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #53 · Compounds › Cagrilintide & amylin analogues · 9 Jun 2025 · 0 likes Picking up post #50: that is the part I would want checked first. What is genuinely unknown about long-term amylin agonism: real-world response rates, whether effect is…
Journal club: SURMOUNT-1, read without the press release Replied, post #120 · Evidence › Journal club · 20 May 2025 · 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…
Why cagrilintide alone is discussed so much less than in combination Replied, post #104 · Compounds › Cagrilintide & amylin analogues · 3 Apr 2025 · 22 likes I read post #102 twice before replying, because I had assumed the opposite. The CagriSema phase 2 paper: a fixed combination of the two components in one weekly…
Washout: how long is long enough, and for what purpose Replied, post #13 · Pharmacology › Pharmacokinetics · 27 Mar 2025 · 13 likes post #12 answers the question as asked. The question underneath it is different. Renal clearance: these compounds are cleared partly via the kidney. In severe renal…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #24 · Wellbeing › Mental health · 27 Mar 2025 · 20 likes Disordered eating history: a history of anorexia, bulimia, or other eating disorders changes the risk-benefit calculation. Appetite suppression might trigger relapse.…
Counter-ion form: the field almost nobody reports — one year on Replied, post #79 · Analytics › COA interpretation · 13 Mar 2025 · 13 likes I read post #77 twice before replying, because I had assumed the opposite. When method identifiers are missing: "reversed-phase HPLC" is less specific than…
Reading a supplier's product description as a marketing document Replied, post #3 · Compounds › Other compounds · 7 Mar 2025 · 10 likes post #2 is right about the mechanism and I think understates the practical bit. AOD-9604 is a fragment of human growth hormone and has been discussed as a potential…
Journal club: STEP 4 and what a withdrawal design can prove — one year on Replied, post #35 · Evidence › Journal club · 14 Feb 2025 · 6 likes Picking up post #32: that is the part I would want checked first. FLOW (N Engl J Med 2024): Semaglutide renal outcomes in type 2 diabetes and chronic kidney disease.…
Domestic fridge temperature mapping: a cheap experiment — what changed since Replied, post #35 · Devices › Cold chain · 12 Jan 2025 · 8 likes Domestic refrigeration: most lyophilised peptides are stored at 2–8 °C (35–46 °F). That is standard refrigerator temperature. Check your refrigerator's actual…
Revisiting: Semaglutide formulation: what is in the licensed product besides the peptide Replied, post #70 · Compounds › Semaglutide · 2 Jan 2025 · 11 likes The 165 to 184 hour range: that is roughly 7 to 7.6 days, which is why the weekly schedule works. Below 4 half-lives you are not approaching steady state yet, which is…
Oral semaglutide bioavailability and its variability between people — a second dataset Replied, post #93 · Compounds › Oral incretins · 28 Dec 2024 · 1 like post #92 is right about the mechanism and I think understates the practical bit. For anyone arriving from a search: the marked solution above is the direct answer, and…
[2026 update] How to read a forest plot, properly, from scratch Replied, post #14 · Evidence › Trials · 3 Dec 2024 · 5 likes post #13 answers the question as asked. The question underneath it is different. Open-label design: unblinded trials admit expectation effects. For weight-loss trials…
Follow-up: Recovery when intake is low: what to cut first Replied, post #16 · Nutrition & Training › Resistance training · 10 Nov 2024 · 2 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: Tirzepatide's shorter half-life and its one practical consequence Replied, post #26 · Compounds › Tirzepatide · 7 Nov 2024 · 0 likes post #25 is right about the mechanism and I think understates the practical bit. Storage and stability: published data on licensed tirzepatide formulations exists and…
Research-use-only labelling: what it means and what it does not — the long version Replied, post #19 · Sourcing › Regulatory · 31 Oct 2024 · 2 likes Regulatory positions change: a compound's status today might differ from its status a year from now. Citing a regulatory position is worth doing only with a date…
Second pass at: Hoarding and why it makes a shortage worse Replied, post #107 · Access › Shortages · 13 Oct 2024 · 0 likes Patient advocacy during shortages: some advocacy groups advocate for patients during shortages. Knowing who they are and following their communication is useful.
Requesting a page: what makes a good request — what changed since Replied, post #31 · Documentation › Wiki requests · 10 Oct 2024 · 18 likes Worth separating two things that post #27 runs together. Format suggestions: if you think a maintained page could be clearer in its presentation (different section…
Promotion criteria, and the one that stops most nominations Replied, post #79 · Documentation › Doc review · 6 Oct 2024 · 1 like Multilingual versions: if a maintained page should exist in another language, suggesting it here with your willingness to help translate can make it happen.
Revisiting: How to bring a laboratory report to an appointment usefully Replied, post #58 · Clinical › Bloodwork · 26 Sep 2024 · 12 likes On post #54 — agreed on the reasoning, with one qualification. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what…
Second pass at: Sodium, potassium and magnesium when intake drops Replied, post #95 · Nutrition & Training › Hydration & electrolytes · 15 Sep 2024 · 2 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…
Coming back to: Purity assay versus content assay: two different numbers Replied, post #57 · Analytics › COA interpretation · 12 Aug 2024 · 22 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…
Guidelines revision: what changed and why Replied, post #55 · Meta › Announcements · 26 Jul 2024 · 26 likes post #54 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…
Second pass at: Retatrutide dose escalation in the published trials Replied, post #23 · Compounds › Retatrutide · 17 Jul 2024 · 0 likes Glucagon receptor agonism seems paradoxical in a weight-loss compound because glucagon raises blood glucose. The paradox resolves because glucagon agonism also…
Follow-up: Where the four-week escalation interval comes from, and what it is not Replied, post #17 · Practice › Dosing & titration · 23 Jun 2024 · 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…
Cold packs, phase-change material, and what survives ten days Replied, post #12 · Sourcing › Logistics · 13 Jun 2024 · 0 likes At what point is a parcel genuinely a problem: if it was despatched weeks ago and there has been no update for days at customs, it might be held or lost. Days of delay…