c.lundgren

TL2 Moderator · Bologna

Contributes reviews on supplier material. Based in Bologna.

Joined 26 July 2025 · last posted 1d

79 posts, newest first. Showing up to 150.

Type 1 diabetes: off-label use and the evidence gap Replied, post #3 · Clinical › Special populations · 27 Jul 2026 · 1 like Medullary thyroid carcinoma history: an absolute contraindication because of the preclinical findings in rodent toxicology. The history (personal or family, especially…
What consumer-accessible tests can and cannot determine — a second dataset Replied, post #122 · Analytics › Home & field testing · 25 Jul 2026 · 22 likes Coming back to post #120, because the follow-up matters more than the original answer. What you can use home tests for: confirmation that a solution contains peptide…
Molecular mass of semaglutide and why the figure differs between sources Replied, post #109 · Compounds › Semaglutide · 25 Jul 2026 · 2 likes This follows post #106 rather than contradicting it. The opalescent appearance in semaglutide solutions is occasionally noted and the mechanism is unclear. It does not…
Insurance and replacement policies, compared Replied, post #116 · Sourcing › Logistics · 25 Jul 2026 · 0 likes Worth separating two things that post #112 runs together. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did…
Peak-to-trough ratio at steady state for a weekly agent — the long version Replied, post #59 · Pharmacology › Pharmacokinetics · 23 Jul 2026 · 20 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,…
Pooling trials with different estimands Replied, post #120 · Evidence › Meta-analyses · 22 Jul 2026 · 5 likes On post #116 — agreed on the reasoning, with one qualification. Subgroup analysis: sometimes a meta-analysis reports separate pooled estimates for different subgroups…
An appeal that succeeded, with the letter structure Replied, post #16 · Access › Insurance & coverage · 22 Jul 2026 · 0 likes post #15 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…
Revisiting: Protein density versus volume when you cannot eat much Replied, post #79 · Nutrition & Training › Protein & intake · 18 Jul 2026 · 0 likes Picking up post #76: that is the part I would want checked first. Thank you for the correction. I have edited my earlier post with a note rather than silently, so the…
A single out-of-range value on an otherwise normal panel Replied, post #73 · Clinical › Bloodwork · 15 Jul 2026 · 18 likes Coming back to post #71, because the follow-up matters more than the original answer. Time of day: some biomarkers vary across the day. Cortisol in the morning differs…
Completing a dose with a second syringe, and the dead-volume arithmetic Replied, post #67 · Practice › Administration · 8 Jul 2026 · 1 like Bleeding at the injection site: normal and usually minimal. A little blood at the needle site after withdrawal is not a reason to assume you lost a significant dose.…
Ultrasound and skinfolds: operator dependence in practice Replied, post #46 · Outcomes › Body composition · 6 Jul 2026 · 0 likes post #45 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…
Pooling trials with different estimands Replied, post #72 · Evidence › Meta-analyses · 5 Jul 2026 · 2 likes Inclusion and exclusion criteria: a meta-analysis is only as good as its inclusion criteria. If the criteria are too broad, apples and oranges get pooled. If they are…
Reference intervals: how they are constructed and why one in twenty flags — does this… Replied, post #10 · Clinical › Bloodwork · 28 Jun 2026 · 4 likes Analytical imprecision: any measurement has an error margin. A small difference in consecutive tests is usually measurement noise, not a real change. Knowing the…
Does dual agonism explain the effect size, or is it dose? Replied, post #49 · Compounds › Tirzepatide · 20 Jun 2026 · 1 like I read post #47 twice before replying, because I had assumed the opposite. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write…
A supplier who responds to a discrepancy with silence — what changed since Replied, post #64 · Sourcing › Red flags · 16 Jun 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.
A structured critique template this community uses — a second dataset Replied, post #9 · Evidence › Study critique · 13 Jun 2026 · 15 likes Bias towards the null and bias away from the null: different criticisms have different directions. Differential dropout might bias away from null; conservative…
Micro-titration: a disputed topic, argued properly — one year on Replied, post #48 · Practice › Dosing & titration · 11 Jun 2026 · 21 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…
An 18-month record including the parts that went badly Replied, post #38 · Outcomes › Progress reports · 11 Jun 2026 · 2 likes Coming back to post #36, because the follow-up matters more than the original answer. Exercise volume changes: increasing exercise intensity or duration can mask weight…
Insomnia at a dose step: reported experiences — the long version Replied, post #32 · Wellbeing › Sleep · 10 Jun 2026 · 12 likes Sleep apnoea improvement: as weight is lost, sleep apnoea usually improves. The timeframe is weeks to months, not immediate. Improvement often is gradual rather than…
Why we ask for units every single time, with three examples of what goes wrong Replied, post #14 · Start Here › How to Ask · 2 Jun 2026 · 0 likes Disagreement-style questions: "I read this and it contradicts what I heard here, which is right?" is answerable. "Is this a bad idea?" without giving the context is not.
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #52 · Evidence › Journal club · 9 May 2026 · 24 likes Worth separating two things that post #48 runs together. Session format: read the paper before posting. The discussion is much better when everyone has. Start with the…
Vomiting: when it is expected and when it is a reason to stop — one year on Replied, post #7 · Practice › Side effects · 6 May 2026 · 5 likes Recognition and grading: nausea ranges from "noticeable" to "limiting". Constipation ranges from mild to severe. Having language to describe the magnitude helps you…
Type 2 diabetes and the largest part of the evidence base Replied, post #81 · Clinical › Comorbidities · 24 Apr 2026 · 21 likes Multiple comorbidities: a person with diabetes, kidney disease, and cardiovascular disease is outside the studied populations in most trials. Extrapolating to that…
Spike-and-recover accuracy for a peptide assay Replied, post #74 · Analytics › Method validation · 9 Apr 2026 · 0 likes This follows post #71 rather than contradicting it. Range: the concentration range over which the method has been validated. Going outside the validated range is going…
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #47 · Sourcing › Vendor reports · 7 Apr 2026 · 5 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…
Coming back to: Washout: how long is long enough, and for what purpose Replied, post #96 · Pharmacology › Pharmacokinetics · 6 Apr 2026 · 2 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…
Labelling requirements for research chemicals Replied, post #6 · Sourcing › Regulatory · 1 Apr 2026 · 27 likes Picking up post #3: 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…
The 2.5 mg starting dose is not a therapeutic dose — why that matters Replied, post #59 · Compounds › Tirzepatide · 27 Mar 2026 · 14 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…
Pregnancy and pregnancy planning: contraindication and washout Replied, post #87 · Clinical › Special populations · 26 Mar 2026 · 0 likes Adolescents: a distinct evidence base exists. The compounds are not approved for routine adolescent obesity but are being studied. Adolescent physiology and psychology…
Second pass at: Choosing a concentration on purpose rather than by accident Replied, post #39 · Practice › Reconstitution · 11 Mar 2026 · 0 likes Picking up post #36: that is the part I would want checked first. Swirling versus inverting versus leaving it alone: the vial can be gently warmed (hands around it) and…
[2026 update] Publication patterns in the BPC-157 literature, examined Replied, post #15 · Compounds › Repair & healing peptides · 9 Mar 2026 · 13 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…
Contributing data without breaching anyone's privacy Replied, post #15 · Data & Tools › Datasets · 3 Mar 2026 · 8 likes Privacy: if contributing data, only share data you are comfortable making permanent and public. Once posted, data is persistent.
[2026 update] Thyroid function tests during substantial weight change Replied, post #7 · Clinical › Bloodwork · 2 Mar 2026 · 0 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 lowest dose that does anything: is that a real question? Replied, post #23 · Practice › Dosing & titration · 2 Mar 2026 · 4 likes Stepping down deliberately: the withdrawal trials show that stopping is followed by regain. The step-down literature is thinner. The conservative assumption is that…
Measurement error in a self-reported exposure Replied, post #44 · Evidence › Study critique · 24 Feb 2026 · 25 likes I read post #42 twice before replying, because I had assumed the opposite. Bias towards the null and bias away from the null: different criticisms have different…
Journal club: STEP 3 and the intensive behavioural therapy floor Replied, post #5 · Evidence › Journal club · 16 Feb 2026 · 27 likes SOUL (N Engl J Med 2025): Oral semaglutide cardiovascular outcomes. Extends the cardiovascular evidence to the oral formulation. Note that oral bioavailability is lower…
Coming back to: Training through a dose escalation week Replied, post #18 · Nutrition & Training › Resistance training · 30 Jan 2026 · 6 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.
Second pass at: Pregnancy and pregnancy planning: contraindication and washout Replied, post #57 · Clinical › Special populations · 24 Jan 2026 · 1 like Picking up post #54: that is the part I would want checked first. Medullary thyroid carcinoma history: an absolute contraindication because of the preclinical findings…
Non-inferiority margins: how they are chosen and how they are abused Replied, post #22 · Evidence › Trials · 8 Dec 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…
Why an oral GLP-1 agonist is a formulation achievement more than a chemistry one Replied, post #24 · Compounds › Oral incretins · 31 Oct 2025 · 30 likes Picking up post #21: that is the part I would want checked first. I disagree with the reply above, and I think the disagreement is substantive rather than…
Follow-up: Why appetite effects are mostly central Replied, post #80 · Pharmacology › Receptor biology · 28 Oct 2025 · 2 likes Pharmacological class effects: all GLP-1 agonists slow gastric emptying and suppress appetite. Those are class effects, not unique to one compound. Effects that differ…
Temperature loggers worth the money Replied, post #44 · Devices › Cold chain · 20 Oct 2025 · 3 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…
Bleeding at the injection site: normal, and what to do about it Replied, post #2 · Practice › Administration · 11 Oct 2025 · 5 likes A site rotation scheme that actually works: abdomen, outer thigh, back of arm, outer hip. Rotate through them in order, move a minimum 2 cm between consecutive sites,…
Column chemistry choices for a 40-residue peptide Replied, post #38 · Analytics › HPLC & UHPLC · 16 Sep 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…
Request: a diff view for wiki revisions — the long version Replied, post #42 · Meta › Feature requests · 13 Sep 2025 · 20 likes Requests for platform and documentation features, with the reasoning that justifies them. If you think the site would be better with a feature, suggest it with enough…
Liver enzymes drifting down and what that usually means Replied, post #9 · Clinical › Bloodwork · 5 Sep 2025 · 22 likes Renal function markers: eGFR is estimated, not measured. It depends on creatinine, age, and weight. A small change in creatinine might not mean a real change in kidney…
When a preprint is the best available evidence and we say so Replied, post #125 · Evidence › Preprints · 1 Sep 2025 · 8 likes Coming back to post #123, because the follow-up matters more than the original answer. Server repositories: medRxiv for medicine, bioRxiv for biology. Preprints on…
Second pass at: Why this subcategory is stricter about sourcing than most Replied, post #118 · Compounds › Secretagogues & GH axis · 31 Aug 2025 · 12 likes This follows post #115 rather than contradicting it. For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it…
High-resolution MS on aggregates and what it can see Replied, post #42 · Analytics › Mass spectrometry · 12 Aug 2025 · 30 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…
Substitution between formats during a shortage Replied, post #36 · Access › Shortages · 9 Aug 2025 · 23 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 ten-fold dose error caught before injection — one year on Replied, post #110 · Devices › Syringes & needles · 4 Aug 2025 · 1 like This follows post #107 rather than contradicting it. Sharps disposal: needles and syringes should be disposed in a sharps container (a rigid, puncture-resistant…
Interim analyses and stopping rules — does this still hold? Replied, post #34 · Evidence › Trials · 5 Jul 2025 · 0 likes This follows post #31 rather than contradicting it. Intent-to-treat versus per-protocol: ITT includes everyone assigned regardless of whether they took the drug.…
Revisiting: German, French and Dutch differences, compared Replied, post #41 · Regional › European Union · 4 Jul 2025 · 30 likes post #40 is right about the mechanism and I think understates the practical bit. Germany: BfArM implements EU framework. Statutory insurance (the majority) excludes…
Coming back to: Sample size calculations, read backwards from the published number Replied, post #48 · Evidence › Trials · 29 Jun 2025 · 11 likes Worth separating two things that post #44 runs together. Intent-to-treat versus per-protocol: ITT includes everyone assigned regardless of whether they took the drug.…
Specification in the result column: why that is a meaningful error Replied, post #12 · Analytics › COA interpretation · 25 Jun 2025 · 5 likes When method identifiers are missing: "reversed-phase HPLC" is less specific than "reversed-phase HPLC at 214 nm on a C18 column with a 10 to 40% acetonitrile gradient…
Semaglutide versus liraglutide head to head: reading STEP 8 carefully Replied, post #10 · Compounds › Semaglutide · 4 Jun 2025 · 0 likes I read post #8 twice before replying, because I had assumed the opposite. Semaglutide versus liraglutide in STEP 8: semaglutide produced greater weight reduction and…
Coming back to: What published stability data actually covers, and what it does not Replied, post #36 · Practice › Storage & stability · 7 May 2025 · 0 likes Worth separating two things that post #32 runs together. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did…
Talking to a therapist about this specifically — does this still hold? Replied, post #57 · Wellbeing › Mental health · 7 May 2025 · 4 likes post #56 is right about the mechanism and I think understates the practical bit. Identity and self-image: for some people, weight and body size are central to identity.…
Second pass at: Journal club: STEP 4 and what a withdrawal design can prove Replied, post #7 · Evidence › Journal club · 4 Apr 2025 · 4 likes FLOW (N Engl J Med 2024): Semaglutide renal outcomes in type 2 diabetes and chronic kidney disease. Stopped early for efficacy. Component-by-component analysis is…
Pancreatitis history and the risk calculus — a second dataset Replied, post #28 · Safety › Contraindications · 23 Mar 2025 · 7 likes Allergy to the specific compound: true allergy is rare but possible. Any prior allergic reaction to the same compound or to structurally similar peptides warrants…
A ten-fold dose error caught before injection Replied, post #11 · Devices › Syringes & needles · 20 Mar 2025 · 21 likes Sharps disposal: needles and syringes should be disposed in a sharps container (a rigid, puncture-resistant container). Do not put them in regular trash. Many…
Coming back to: How to tell whether your question is already answered on a maintained page Replied, post #3 · Start Here › Welcome · 1 Mar 2025 · 0 likes Trust levels accumulate over time and they give you access to small things like the ability to edit your own posts without a timestamp. They are not a status symbol and…
Canadian access and provincial variation Replied, post #2 · Regional › North America · 18 Jan 2025 · 19 likes On the opening post — agreed on the reasoning, with one qualification. Compounding pharmacies: pharmaceutical compounding of a drug not on the FDA shortage list is…
Follow-up: Tirzepatide's shorter half-life and its one practical consequence Replied, post #129 · Compounds › Tirzepatide · 4 Jan 2025 · 3 likes This follows post #126 rather than contradicting it. Titration schedules for tirzepatide have more dose steps than semaglutide partly because the compound is more…
Escalating every six weeks instead of four: what I observed over eight months Replied, post #3 · Practice › Dosing & titration · 31 Dec 2024 · 15 likes The four-week escalation interval is a convention from the pivotal trials, not a pharmacological constant. The pharmacological argument is that with a week-long…
Fixed versus detachable needles: the trade-offs Replied, post #75 · Devices › Syringes & needles · 27 Dec 2024 · 12 likes Worth separating two things that post #71 runs together. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did…
Molecular mass of semaglutide and why the figure differs between sources — does this… Replied, post #60 · Compounds › Semaglutide · 22 Dec 2024 · 1 like The STEP programme populations were selected: enrollment criteria required baseline body mass index over 30, no recent blood pressure crisis, no recent retinopathy, no…
Washout with a one-week half-life: the arithmetic Replied, post #67 · Research Methods › N-of-1 designs · 4 Dec 2024 · 7 likes Designing a personal experiment that could actually change your mind: that is the standard for an n-of-1 design. An experiment designed so that any result confirms what…
Reading a preclinical wound-healing model and its relevance to a human tendon Replied, post #122 · Compounds › Repair & healing peptides · 23 Nov 2024 · 5 likes post #121 is right about the mechanism and I think understates the practical bit. Stability of BPC-157 in solution: what has been measured in published work covers…
Follow-up: Recovery when intake is low: what to cut first Replied, post #3 · Nutrition & Training › Resistance training · 1 Nov 2024 · 29 likes Recovery: heavier training on a energy deficit and on a compound that slows gastric emptying requires attention to recovery (sleep, nutrition, stress). Recovery…
Second pass at: Food noise reducing and the disorientation that can follow Replied, post #58 · Wellbeing › Mental health · 29 Oct 2024 · 1 like 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…
Requesting a page: what makes a good request — what changed since Replied, post #51 · Documentation › Wiki requests · 11 Oct 2024 · 0 likes Suggesting content for a page: if you know a maintained page is missing something important, post a suggestion with specific content you think should be added.
Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Replied, post #13 · Compounds › Other compounds · 22 Sep 2024 · 0 likes On post #9 — agreed on the reasoning, with one qualification. This subcategory exists because some people will research compounds outside the main groups discussed…
Second pass at: Sodium, potassium and magnesium when intake drops Replied, post #66 · Nutrition & Training › Hydration & electrolytes · 30 Aug 2024 · 13 likes Exercise and electrolyte losses: sweating during exercise increases sodium and potassium losses. Electrolyte replacement during or after intense exercise helps maintain…
Orforglipron as a non-peptide: what changes when the molecule is small Replied, post #19 · Compounds › Oral incretins · 29 Aug 2024 · 31 likes On post #15 — agreed on the reasoning, with one qualification. PIONEER programme is phase 3 for oral semaglutide. The trials cover multiple indications and durations.…
Coming back to: Purity assay versus content assay: two different numbers Replied, post #38 · Analytics › COA interpretation · 11 Aug 2024 · 28 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…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #32 · Clinical › Prescriber conversations · 5 Aug 2024 · 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.
Assessing a warm arrival: the decision process — one year on Replied, post #77 · Sourcing › Logistics · 31 May 2024 · 32 likes post #76 is right about the mechanism and I think understates the practical bit. At what point is a parcel genuinely a problem: if it was despatched weeks ago and there…
Assessing a warm arrival: the decision process — one year on Replied, post #5 · Sourcing › Logistics · 28 May 2024 · 16 likes Cold packs and temperature control: inclusion of cold packs at despatch is standard. Whether they maintain temperature through transit depends on journey duration and…