j.marchetti

TL2 Moderator · Split

Contributes reviews on supplier material. Based in Split.

Joined 22 November 2024 · last posted 8d

89 posts, newest first. Showing up to 150.

What I would want from a home test that does not exist yet — what changed since Replied, post #102 · Analytics › Home & field testing · 20 Jul 2026 · 9 likes Picking up post #99: that is the part I would want checked first. Colorimetric tests: colour intensity correlates with concentration, but the relationship is non-linear…
Lean mass preservation: what the evidence supports — does this still hold? Replied, post #117 · Outcomes › Body composition · 18 Jul 2026 · 0 likes Visceral fat: DXA does not distinguish visceral (organ-associated) fat from subcutaneous fat. That distinction might matter but requires different imaging to measure.
Seven-day rolling means and why weekly readings mislead Replied, post #47 · Outcomes › Progress reports · 17 Jul 2026 · 18 likes Worth separating two things that post #43 runs together. Longitudinal report with the method stated: same scale, same time of day, same conditions. A scale is a tool;…
About the Resistance training category Replied, post #5 · Nutrition & Training › Resistance training · 11 Jul 2026 · 13 likes Frequency: three sessions per week of full-body training is easier to maintain than higher frequencies on an energy deficit. Consistency beats intensity when recovery…
Follow-up: How compounding permissions changed when supply normalised Replied, post #5 · Sourcing › Regulatory · 9 Jul 2026 · 0 likes On the opening post — agreed on the reasoning, with one qualification. Import restrictions vary by compound and by jurisdiction: what is a controlled substance in one…
A site rotation scheme that is easy enough to actually follow Replied, post #106 · Practice › Administration · 5 Jul 2026 · 0 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…
GHRH analogues versus ghrelin mimetics: different mechanisms, conflated discussion Replied, post #36 · Compounds › Secretagogues & GH axis · 3 Jul 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…
Secretagogues and glucose tolerance: the mechanistic concern Replied, post #50 · Compounds › Secretagogues & GH axis · 26 Jun 2026 · 0 likes I read post #48 twice before replying, because I had assumed the opposite. What a well-designed human trial of a secretagogue would look like: randomised,…
Primary endpoint hierarchies and why order matters — one year on Replied, post #26 · Evidence › Trials · 26 Jun 2026 · 28 likes Worth separating two things that post #22 runs together. Absolute numbers, not just relative: a 30% relative reduction tells you the ratio but not the practical…
Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #15 · Analytics › Impurities & related substances · 21 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.
[2026 update] A vial that will not fully dissolve: what to check and in what order Replied, post #118 · Practice › Reconstitution · 19 Jun 2026 · 9 likes Worth separating two things that post #114 runs together. Arithmetic step by step: a 5 mg vial with 2 mL of diluent gives (5 mg) / (2 mL) = 2.5 mg/mL. On a U-100…
Trust level 3 requirements: a clarification — does this still hold? Replied, post #65 · Meta › Announcements · 16 Jun 2026 · 0 likes post #64 answers the question as asked. The question underneath it is different. Scheduled maintenance: if the site is going offline for maintenance, advance notice…
Submitting a sample: the process end to end Replied, post #19 · Sourcing › Independent verification · 15 Jun 2026 · 13 likes How to submit a sample: contact the service directly. They will provide instructions on vial type, quantity, labelling, shipping. Following their instructions exactly…
What to include when your question involves a chromatogram — one year on Replied, post #35 · Start Here › How to Ask · 12 Jun 2026 · 4 likes I read post #33 twice before replying, because I had assumed the opposite. What you have already read matters. Saying "I read the maintained page on this and I still…
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #75 · Data & Tools › Datasets · 4 Jun 2026 · 11 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…
What TRIUMPH is designed to answer, and why we should not pre-empt it — does this still… Replied, post #21 · Compounds › Retatrutide · 7 May 2026 · 31 likes The phase 2 obesity paper reported dose-dependent weight reduction of a magnitude that attracted attention. It also reported dose-dependent heart-rate increases. The…
Anaesthesia and elective surgery: the aspiration question Replied, post #111 · Practice › Interactions · 4 May 2026 · 21 likes Picking up post #108: that is the part I would want checked first. Anticoagulants: no direct interaction with the compounds in this class. Weight loss and body…
Follow-up: Tirzepatide and nausea: is the profile genuinely different or just… Replied, post #11 · Compounds › Tirzepatide · 30 Apr 2026 · 0 likes post #10 is right about the mechanism and I think understates the practical bit. Titration schedules for tirzepatide have more dose steps than semaglutide partly…
Request: show the solution author in the topic list — what changed since Replied, post #10 · Meta › Feature requests · 30 Apr 2026 · 15 likes Tradeoffs: every feature has a cost in maintenance and complexity. Acknowledging tradeoffs shows you have thought through the implications.
Transporting a vial for a weekend away — a second dataset Replied, post #34 · Practice › Storage & stability · 22 Apr 2026 · 0 likes Temperature excursions: if a vial sat at room temperature for a time, the question is whether the excursion was long enough to cause damage. Hours at room temperature…
Follow-up: State-level differences that actually matter Replied, post #3 · Regional › North America · 3 Apr 2026 · 0 likes On the opening post — agreed on the reasoning, with one qualification. United States: FDA licenses compounds. Prescribing and pharmacy practice are state-regulated.…
Follow-up: Reconciling a label claim with a content assay Replied, post #12 · Analytics › COA interpretation · 28 Mar 2026 · 0 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…
Five questions in one post gets you one answer — how to split them Replied, post #41 · Start Here › How to Ask · 28 Mar 2026 · 0 likes Picking up post #38: that is the part I would want checked first. Lab result questions: state the result, the reference interval, and what else is on the same panel. A…
Introducing myself: pharmacist, sceptic, reluctant participant — one year on Replied, post #68 · Lounge › Introductions · 15 Mar 2026 · 3 likes Welcome: the response to introductions is usually welcome. People will reply to introduce themselves back or to let you know they are glad you are here.
Rotating between abdomen, thigh and upper arm: absorption differences — one year on Replied, post #32 · Practice › Administration · 13 Mar 2026 · 0 likes On post #28 — agreed on the reasoning, with one qualification. A site rotation scheme that actually works: abdomen, outer thigh, back of arm, outer hip. Rotate through…
Reading a preclinical wound-healing model and its relevance to a human tendon — a second… Replied, post #7 · Compounds › Repair & healing peptides · 7 Mar 2026 · 2 likes Worth separating two things that post #3 runs together. TB-500 is usually the 7-residue actin-binding fragment of thymosin beta-4, not the full 43-residue protein. The…
The most useful thing you learned here that was not the answer you came for Replied, post #22 · Lounge › Off topic · 21 Feb 2026 · 29 likes Personal stories: if you want to talk about what led you to this compound, your journey, or how the change has affected your life, the Lounge is the place for that.
Injection discomfort: needle gauge, volume, temperature, technique Replied, post #26 · Practice › Administration · 14 Feb 2026 · 3 likes Cold solution and stinging: warming the vial in your hands for a minute before injection reduces the stinging sensation substantially. This is the simplest thing to try…
Reused chromatograms across lots: how to spot it — what changed since Replied, post #13 · Analytics › COA interpretation · 24 Jan 2026 · 3 likes Purity and content are different measurements: purity tells you what proportion of the detected material is the intended species. Content tells you how much of the…
Price changes over 2025 and 2026, tabulated and dated — does this still hold? Replied, post #58 · Access › Pricing · 10 Jan 2026 · 11 likes Coming back to post #56, because the follow-up matters more than the original answer. Two things before anyone answers the substance. First, the context in the first…
Promotion criteria, and the one that stops most nominations — the long version Replied, post #124 · Documentation › Doc review · 2 Jan 2026 · 0 likes This follows post #121 rather than contradicting it. Multilingual versions: if a maintained page should exist in another language, suggesting it here with your…
Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #75 · Compounds › Semaglutide · 22 Dec 2025 · 1 like post #74 is right about the mechanism and I think understates the practical bit. The STEP programme populations were selected: enrollment criteria required baseline…
How to ask about something you suspect is a bad idea Replied, post #36 · Start Here › How to Ask · 20 Dec 2025 · 0 likes On post #32 — agreed on the reasoning, with one qualification. Disagreement-style questions: "I read this and it contradicts what I heard here, which is right?" is…
Second pass at: How to ask a question when you cannot say why you are asking it Replied, post #39 · Start Here › How to Ask · 6 Dec 2025 · 2 likes Asking a follow-up: new topic or reply in the old one? If the answer depends on the previous post, reply. If it is a question that makes sense without the previous…
Request: a diff view for wiki revisions — the long version Replied, post #79 · Meta › Feature requests · 4 Dec 2025 · 28 likes Worth separating two things that post #75 runs together. Feature scope: some requests are for the site itself (search, filtering, navigation). Some are for the…
Heterogeneity as information rather than as a nuisance Replied, post #3 · Evidence › Meta-analyses · 18 Nov 2025 · 21 likes This follows post #2 rather than contradicting it. Sensitivity analysis: the authors re-run the meta-analysis excluding studies one at a time, or by quality, to see…
Coming back to: Why most self-reports here are not experiments, and that is fine Replied, post #20 · Research Methods › N-of-1 designs · 18 Nov 2025 · 3 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…
Revisiting: Aggregates and why a purity assay may miss them entirely Replied, post #16 · Analytics › Impurities & related substances · 16 Nov 2025 · 1 like 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…
Reading SURMOUNT-1 without the press release — one year on Replied, post #21 · Compounds › Tirzepatide · 11 Nov 2025 · 0 likes Coming back to post #19, because the follow-up matters more than the original answer. Having read the exchange above, I think I was wrong earlier in this topic and I…
[2026 update] What steady state means for the decision to escalate Replied, post #51 · Practice › Dosing & titration · 10 Nov 2025 · 31 likes This follows post #48 rather than contradicting it. For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add…
Early satiety becoming a problem rather than a benefit Replied, post #2 · Practice › Side effects · 17 Oct 2025 · 8 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…
Second pass at: Programming during a large energy deficit Replied, post #39 · Nutrition & Training › Resistance training · 14 Oct 2025 · 2 likes Coming back to post #37, because the follow-up matters more than the original answer. Practical note that does not fit anywhere else. Whatever you conclude from this…
Sleep quality changes during weight loss — what changed since Replied, post #15 · Wellbeing › Sleep · 3 Oct 2025 · 0 likes When sleep problems need attention: if sleep does not improve as weight loss continues or if it worsens, discussing with a clinician is prudent. Sleep disorders are…
Insurance and replacement policies, compared — the long version Replied, post #12 · Sourcing › Logistics · 4 Sep 2025 · 8 likes I read post #10 twice before replying, because I had assumed the opposite. Packaging integrity on arrival: if a parcel arrives with compromised packaging, that is…
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #3 · Lounge › Off topic · 22 Aug 2025 · 26 likes Industry and supply chain: post about manufacturing, pharmaceutical economics, or market dynamics if you have something substantive to contribute.
Coming back to: What published stability data actually covers, and what it does not Replied, post #113 · Practice › Storage & stability · 14 Aug 2025 · 3 likes Visual inspection: if a solution is visibly cloudy, discoloured, or contains particles, those are red flags. Faint opalescence or minor colour shift may be normal but…
What a regulator's shortage notice actually authorises — what changed since Started this topic · Sourcing › Regulatory · 27 Jul 2025 · 57 likes The question in the title: What a regulator's shortage notice actually authorises — what changed since I will give what I have already checked below so nobody repeats…
Sodium, potassium and magnesium when intake drops Replied, post #26 · Nutrition & Training › Hydration & electrolytes · 22 Jun 2025 · 7 likes Potassium: similar to sodium; losing weight involves some potassium loss. Bananas, sweet potatoes, and other potassium-rich foods help. Severe depletion is rare but…
Why "any advice?" is the least effective ending for a post — the long version Replied, post #9 · Start Here › How to Ask · 3 Jun 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…
Journal club: indirect comparison between two programmes, defended and attacked — one… Replied, post #10 · Evidence › Journal club · 26 May 2025 · 18 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…
Journal club: SURMOUNT-4 and continuation versus withdrawal — a second dataset Replied, post #25 · Evidence › Journal club · 2 May 2025 · 18 likes SURPASS-2 (N Engl J Med 2021): Direct comparison of tirzepatide with semaglutide 1.0 mg. The 1.0 mg dose is not the highest available, which is the central and…
Counter-ion content and its effect on measured mass Replied, post #27 · Analytics › Mass spectrometry · 29 Apr 2025 · 7 likes Picking up post #24: 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…
UK access routes, dated and sourced — a second dataset Replied, post #69 · Regional › UK & Ireland · 26 Apr 2025 · 20 likes Picking up post #66: that is the part I would want checked first. I disagree with the reply above, and I think the disagreement is substantive rather than…
Ipamorelin selectivity claims and where they came from Replied, post #31 · Compounds › Secretagogues & GH axis · 23 Apr 2025 · 0 likes Development history is more informative than speculation: ipamorelin was investigated clinically for post-operative ileus and was not taken forward to registration.…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #126 · Evidence › Journal club · 23 Apr 2025 · 0 likes Session format: read the paper before posting. The discussion is much better when everyone has. Start with the estimand and population, then methods, then results, then…
Second pass at: Journal club: STEP 4 and what a withdrawal design can prove Replied, post #12 · Evidence › Journal club · 23 Apr 2025 · 0 likes SELECT (N Engl J Med 2023): Semaglutide cardiovascular outcomes without diabetes. The first outcome trial in people without diabetes, which decoupled the cardiovascular…
What SELECT changed about how semaglutide is discussed, and what it did not Replied, post #80 · Compounds › Semaglutide · 17 Apr 2025 · 3 likes Is there a ceiling dose beyond which the effect plateaus? The trials did not study that because they stopped at 2.4 mg. Some people report trying higher doses, but…
The C-cell question: rodent findings and their human context Replied, post #6 · Compounds › Semaglutide · 8 Apr 2025 · 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…
Reconstituting a multi-strength kit without mixing yourself up Replied, post #53 · Practice › Reconstitution · 5 Apr 2025 · 24 likes Choosing a concentration on purpose rather than by accident: starting with "I want to draw 0.5 mL per dose" and working backward to the required concentration is more…
Counter-ion form: the field almost nobody reports — one year on Replied, post #101 · Analytics › COA interpretation · 19 Mar 2025 · 22 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…
Research-use-only labelling: what it means and what it does not — the long version Replied, post #106 · Sourcing › Regulatory · 16 Mar 2025 · 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.
Why mass spectrometry cannot tell you about an epimer Replied, post #82 · Analytics › Mass spectrometry · 9 Mar 2025 · 20 likes Quantitation by MS: most quantitation is done by LC-UV detection at 214 nm, not by MS, because extinction coefficients are better known. MS can quantify if an internal…
Second pass at: Manufacturer assistance programmes and their eligibility rules Replied, post #11 · Access › Pricing · 5 Mar 2025 · 0 likes Cost per milligram is the only comparison that survives format differences, but even then it needs care. A pen and a vial are not the same product and cannot be…
Follow-up: Tesamorelin has an approved indication — what that changes about the evidence Replied, post #18 · Compounds › Secretagogues & GH axis · 2 Mar 2025 · 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…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #14 · Sourcing › Regulatory · 27 Feb 2025 · 9 likes Labelling and intended use: a compound sold as "research-use-only" does not change its pharmacology if ingested. It changes the legal status of the sale. The labelling…
Consistent declarations and why they matter more than clever ones Replied, post #52 · Sourcing › Logistics · 18 Feb 2025 · 17 likes Insurance and carrier liability: most parcel carriers limit liability. Understanding the limits before choosing a carrier matters if you are shipping expensive material.
Biased agonism: a real phenomenon, an over-used explanation — what changed since Replied, post #54 · Pharmacology › Receptor biology · 17 Feb 2025 · 6 likes Worth separating two things that post #50 runs together. Glucagon receptor agonism: glucagon receptor agonism increases energy expenditure and promotes hepatic fat…
When to suspect the method rather than the sample Replied, post #71 · Analytics › Method validation · 25 Jan 2025 · 2 likes Transfer between laboratories: a method can be transferred from one lab to another, but the receiving lab needs to demonstrate that they can achieve the same…
Scheduled maintenance and what will be unavailable Replied, post #17 · Meta › Announcements · 17 Jan 2025 · 5 likes Scheduled maintenance: if the site is going offline for maintenance, advance notice will be posted here with the duration and scope.
SURPASS-2 and the comparator dose question that will not go away Replied, post #102 · Compounds › Tirzepatide · 11 Jan 2025 · 30 likes Coming back to post #100, because the follow-up matters more than the original answer. Dual agonism versus dose: how much of tirzepatide's effect is the GIP component…
Recovery when intake is low: what to cut first Replied, post #15 · Nutrition & Training › Resistance training · 10 Jan 2025 · 3 likes post #14 answers the question as asked. The question underneath it is different. Volume: the number of sets per muscle group per week that supports muscle maintenance…
Follow-up: Individual participant data versus aggregate data Replied, post #43 · Evidence › Meta-analyses · 9 Jan 2025 · 13 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…
Micronutrient status when intake falls substantially — a second dataset Replied, post #7 · Clinical › Bloodwork · 4 Jan 2025 · 13 likes Biological variation: the person-to-person variation in a biomarker for a healthy person is larger than most people realize. Comparing your result to the reference…
Oxidation pathways for methionine and tryptophan Replied, post #64 · Analytics › Impurities & related substances · 31 Dec 2024 · 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…
A promotion I argued against, and why I lost Replied, post #45 · Documentation › Doc review · 30 Dec 2024 · 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…
Body image changing more slowly than the body Replied, post #55 · Wellbeing › Mental health · 17 Dec 2024 · 16 likes Support and community: some people process weight change through community (online or in-person). Others prefer privacy. Knowing what you need and seeking it…
Tirzepatide storage and stability: what is published versus what is assumed — does this… Replied, post #14 · Compounds › Tirzepatide · 15 Dec 2024 · 25 likes On post #10 — agreed on the reasoning, with one qualification. Dual agonism versus dose: how much of tirzepatide's effect is the GIP component and how much is simply…
[2026 update] Step therapy requirements and how to satisfy them Replied, post #65 · Access › Insurance & coverage · 11 Dec 2024 · 0 likes Prior authorisation: pre-approval requirements and how to satisfy them. Most denials cite specific criteria. Understanding the criterion is the first step in satisfying…
Coming back to: When to suspect the method rather than the sample Replied, post #6 · Analytics › Method validation · 28 Nov 2024 · 0 likes post #5 answers the question as asked. The question underneath it is different. Stability-indicating method: one that can separate a compound from its degradation…
Glucagon receptor agonism in a weight-loss compound Replied, post #3 · Pharmacology › Receptor biology · 25 Nov 2024 · 5 likes Central versus peripheral action: GLP-1 agonism works through both central nervous system effects (appetite) and peripheral effects (gastric motility, insulin). The…
Revisiting: Bug report: the reconstitution calculator and a rounding edge case Replied, post #2 · Data & Tools › Calculators · 22 Nov 2024 · 0 likes Reporting bugs: if you notice a calculator giving wrong results, report it in this subcategory. Bugs are fixed when identified.
Tracking semaglutide's approved indications across jurisdictions, dated — does this… Replied, post #35 · Compounds › Semaglutide · 20 Nov 2024 · 4 likes On post #31 — agreed on the reasoning, with one qualification. Two things before anyone answers the substance. First, the context in the first post is clear and…
EMA product information as a primary source — does this still hold? Replied, post #55 · Regional › European Union · 16 Nov 2024 · 0 likes This follows post #52 rather than contradicting it. Italy: AIFA controls reimbursement through a note system. Weight-management indications have not attracted public…
Promotion criteria, and the one that stops most nominations Replied, post #94 · Documentation › Doc review · 24 Oct 2024 · 32 likes Evidence synthesis requests: if you think a page should summarise the state of evidence on a question, and you think the information exists but is scattered, suggest…
Why a preprint's supplementary material is often the best part Replied, post #26 · Evidence › Preprints · 16 Sep 2024 · 0 likes Do not build anything on a preprint that you would mind rebuilding: if the preprint later changes substantially in revision or shows different results when published,…
Chronic kidney disease and the FLOW result Replied, post #26 · Clinical › Comorbidities · 19 Aug 2024 · 23 likes Bariatric surgery history: altered anatomy after surgery affects absorption. That matters for oral medications and for reconstituted solutions. Discussing specific…
Journal club: SURPASS-2 and the semaglutide 1 mg comparator Replied, post #6 · Evidence › Journal club · 29 Jul 2024 · 7 likes Coming back to post #4, because the follow-up matters more than the original answer. STEP 1 (N Engl J Med 2021): The pivotal obesity trial for semaglutide and the…
Follow-up: Conditions that change the calculus rather than forbidding it Replied, post #5 · Safety › Contraindications · 13 Jul 2024 · 5 likes post #4 is right about the mechanism and I think understates the practical bit. Diabetic retinopathy complications: a signal for this was noted in SUSTAIN 6. Current…
The mass-error checker and its intended scope Replied, post #55 · Data & Tools › Calculators · 17 Jun 2024 · 0 likes post #54 is right about the mechanism and I think understates the practical bit. Why calculators are not medical advice: they do arithmetic. Medical decisions are not…