r.torrence

TL2 Member · Nijmegen, NL

Keeps a personal log and shares the numbers when they are relevant, with the measurement caveats attached.

Joined 16 August 2025 · last posted 3d

68 posts, newest first. Showing up to 150.

Semaglutide formulation: what is in the licensed product besides the peptide Replied, post #35 · Compounds › Semaglutide · 25 Jul 2026 · 13 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…
GIP receptor agonism and the argument about direction — does this still hold? Replied, post #14 · Pharmacology › Receptor biology · 25 Jul 2026 · 4 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…
Reading order for a first week here, and what to skip until later — what changed since Replied, post #72 · Start Here › Welcome · 22 Jul 2026 · 25 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…
Documenting a supplier's response to a discrepancy Replied, post #39 · Sourcing › Vendor reports · 15 Jul 2026 · 3 likes I read post #37 twice before replying, because I had assumed the opposite. Testing service selection: Janoshik gives purity with chromatogram. Medutest gives combined…
Stepping down deliberately, and how to do it without losing progress — what changed since Replied, post #28 · Practice › Dosing & titration · 30 Jun 2026 · 16 likes On post #24 — agreed on the reasoning, with one qualification. How the published trials escalated: they used specific step sizes and intervals. The STEP programme used…
Why the timeline is on the right and not the left — what changed since Replied, post #64 · Meta › Site feedback · 29 Jun 2026 · 6 likes Performance: if pages are slow to load, timeouts occur, or the site is unresponsive, that is worth reporting with details (when, which pages, how slow).
GLP-1 receptor distribution: central and peripheral Replied, post #78 · Pharmacology › Receptor biology · 27 Jun 2026 · 0 likes Amylin receptor signalling: amylin promotes satiety and slows gastric emptying through a receptor distinct from GLP-1. The hypothesis behind combination therapy is two…
Secretagogues and glucose tolerance: the mechanistic concern Replied, post #41 · Compounds › Secretagogues & GH axis · 19 Jun 2026 · 0 likes This follows post #38 rather than contradicting it. Tesamorelin has an approved indication in HIV-associated lipodystrophy. That is the only compound in this class with…
Submitting a sample: the process end to end Replied, post #12 · Sourcing › Independent verification · 11 Jun 2026 · 12 likes Repeat testing: if you want to verify the same lot a second time, testing with a different service strengthens the conclusion. Testing with the same service verifies…
Angle of injection and whether 90 degrees is always right — the long version Replied, post #20 · Practice › Administration · 9 Jun 2026 · 23 likes On post #16 — agreed on the reasoning, with one qualification. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what…
Official shortage notices and what they authorise Replied, post #93 · Access › Shortages · 7 Jun 2026 · 1 like Supply interruptions: official shortage notices are published by regulatory agencies. That is the correct primary source rather than pharmacy rumors or forum discussion.
A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #95 · Sourcing › Red flags · 6 Jun 2026 · 0 likes Documentation quality as a signal: a supplier that reports method identifiers, distinguishes specification from result, and states the counter-ion form is telling you…
What a certificate commits its issuer to — one year on Replied, post #77 · Analytics › COA interpretation · 28 May 2026 · 18 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…
Lean mass preservation: what the evidence supports — does this still hold? Replied, post #84 · Outcomes › Body composition · 27 May 2026 · 4 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…
How this community labels and discusses unrefereed work — the long version Replied, post #7 · Evidence › Preprints · 11 May 2026 · 5 likes Always label it as a preprint in any discussion. A preprint is not a published trial and it is not settled knowledge. Use it for hypothesis generation and for…
Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #21 · Analytics › HPLC & UHPLC · 3 May 2026 · 25 likes Method validation is the demonstration that a method can separate the compound from its degradation products and impurities reliably. A method that cannot resolve an…
The 2.5 mg starting dose is not a therapeutic dose — why that matters Replied, post #92 · Compounds › Tirzepatide · 21 Apr 2026 · 0 likes Half-life difference: tirzepatide is about 5 days versus semaglutide's week-long. Practically, that means steady state is reached slightly faster and the post-dose…
Amylin receptor signalling and satiety — what changed since Replied, post #58 · Pharmacology › Receptor biology · 8 Apr 2026 · 0 likes Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
EU-wide position versus national implementation — what changed since Replied, post #22 · Regional › European Union · 5 Apr 2026 · 1 like post #21 answers the question as asked. The question underneath it is different. Reimbursement varies substantially by member state. Some (Germany, France, Netherlands)…
Adducts: sodium, potassium, and the peak you did not expect — does this still hold? Replied, post #79 · Analytics › Mass spectrometry · 23 Mar 2026 · 19 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…
Revisiting: Absolute versus relative contraindications Replied, post #48 · Safety › Contraindications · 21 Mar 2026 · 18 likes This follows post #45 rather than contradicting it. Severe renal impairment (eGFR
Nausea profile of amylin analogues compared with GLP-1 agonists Replied, post #76 · Compounds › Cagrilintide & amylin analogues · 19 Mar 2026 · 0 likes Nausea profile of amylin analogues: the historical agent pramlintide required multiple daily doses and had a difficult tolerability profile. A weekly formulation is a…
Guidelines revision: what changed and why — one year on Replied, post #76 · Meta › Announcements · 28 Feb 2026 · 0 likes Notifications: watching this subcategory means you receive notifications when announcements are posted. Useful if you want to stay current.
Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #123 · Practice › Dosing & titration · 21 Feb 2026 · 20 likes post #122 is right about the mechanism and I think understates the practical bit. How the published trials escalated: they used specific step sizes and intervals. The…
Reused chromatograms across lots: how to spot it — what changed since Replied, post #16 · Analytics › COA interpretation · 8 Feb 2026 · 1 like Coming back to post #14, because the follow-up matters more than the original answer. When method identifiers are missing: "reversed-phase HPLC" is less specific than…
Second pass at: Adsorptive losses at low concentration, and why dilute solutions are… Replied, post #20 · Practice › Storage & stability · 17 Jan 2026 · 0 likes post #19 is right about the mechanism and I think understates the practical bit. I disagree with the reply above, and I think the disagreement is substantive rather…
[2026 update] Storing lyophilised material long term: what governs the shelf life Replied, post #39 · Practice › Storage & stability · 21 Dec 2025 · 19 likes post #38 answers the question as asked. The question underneath it is different. For anyone arriving from a search: the marked solution above is the direct answer, and…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly — the long… Replied, post #61 · Compounds › Tirzepatide · 9 Dec 2025 · 12 likes post #60 is right about the mechanism and I think understates the practical bit. SURPASS-2 compared tirzepatide with semaglutide 1.0 mg, the licensed diabetes dose at…
Heterogeneity as information rather than as a nuisance Replied, post #10 · Evidence › Meta-analyses · 28 Nov 2025 · 1 like 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…
SURMOUNT-4 and what withdrawal data does and does not tell an individual — one year on Replied, post #69 · Compounds › Tirzepatide · 22 Oct 2025 · 12 likes Picking up post #66: 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…
Research-use-only status: what it means legally and practically — does this still hold? Replied, post #3 · Compounds › Other compounds · 21 Oct 2025 · 0 likes post #2 is right about the mechanism and I think understates the practical bit. Distinguishing marketed research compounds from true chemical synthesis: some online…
New subcategory: rationale and scope Replied, post #36 · Meta › Announcements · 16 Oct 2025 · 7 likes Questions welcomed: if an announcement is unclear, asking for clarification is welcome. Staff will explain their reasoning.
What happens after your first post: likes, trust levels, and why none of it matters much… Replied, post #13 · Start Here › Welcome · 12 Oct 2025 · 12 likes Off-topic posts that do not belong here belong in the Lounge instead. You are not in trouble if a moderator moves your post — they are just routing it to the right…
Coming back to: Why most self-reports here are not experiments, and that is fine Replied, post #11 · Research Methods › N-of-1 designs · 12 Oct 2025 · 3 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…
Sleep quality changes during weight loss — what changed since Replied, post #14 · Wellbeing › Sleep · 1 Oct 2025 · 17 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…
Which panel is worth repeating and which is worth ignoring Replied, post #125 · Clinical › Bloodwork · 30 Sep 2025 · 7 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…
Pages past their review date, listed Replied, post #24 · Meta › Wiki maintenance · 30 Aug 2025 · 14 likes This follows post #21 rather than contradicting it. Review dates: each maintained page has a review date (the date by which it should be checked). If a page is past its…
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #10 · Lounge › Off topic · 28 Aug 2025 · 2 likes Worth separating two things that post #6 runs together. Lower-stakes conversation that does not belong in the technical categories. Still civil, still sourced when a…
[2026 update] Journal club: is percentage weight change the right endpoint? Replied, post #74 · Evidence › Journal club · 20 Aug 2025 · 9 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…
A request that was declined, and the reasoning — a second dataset Replied, post #99 · Documentation › Wiki requests · 16 Aug 2025 · 0 likes post #98 answers the question as asked. The question underneath it is different. Correction requests: if you spot an error in a maintained page, note it here with the…
Semaglutide versus liraglutide head to head: reading STEP 8 carefully Replied, post #41 · Compounds › Semaglutide · 13 Aug 2025 · 0 likes The opalescent appearance in semaglutide solutions is occasionally noted and the mechanism is unclear. It does not appear to correlate with product failure in practice.…
Gauge and length selection for subcutaneous injection Replied, post #16 · Devices › Syringes & needles · 30 Jul 2025 · 3 likes On post #12 — agreed on the reasoning, with one qualification. Needle gauge: smaller numbers (30G) are finer and less painful. Larger numbers (25G) are courser. For…
Revisiting: Why a compound being unapproved is not the same as being illegal to possess Replied, post #37 · Sourcing › Regulatory · 29 Jun 2025 · 6 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: Semaglutide and alcohol: what is actually documented Replied, post #20 · Compounds › Semaglutide · 29 Jun 2025 · 7 likes Gastric emptying delay is the mechanism behind most of the gastrointestinal side effects. Slowing the stomach empties it feeds less food into the intestines at a time,…
Excipient function in a licensed injectable Replied, post #8 · Pharmacology › Formulation chemistry · 31 May 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…
Revisiting: GLP-1 receptor distribution: central and peripheral Started this topic · Pharmacology › Receptor biology · 18 May 2025 · 27 likes Revisiting: GLP-1 receptor distribution: central and peripheral — setting out what I have, and where I think it stops being reliable. A documentation question rather…
Why "any advice?" is the least effective ending for a post — the long version Replied, post #4 · Start Here › How to Ask · 18 May 2025 · 12 likes Worth separating two things that the opening post runs together. Asking a follow-up: new topic or reply in the old one? If the answer depends on the previous post,…
What SELECT changed about how semaglutide is discussed, and what it did not Replied, post #121 · Compounds › Semaglutide · 17 May 2025 · 0 likes Semaglutide versus liraglutide in STEP 8: semaglutide produced greater weight reduction and the discontinuation rates differed. But the trial was open-label for the…
Reading a trial's population section before its results — does this still hold? Replied, post #70 · Evidence › Trials · 5 May 2025 · 16 likes Absolute numbers, not just relative: a 30% relative reduction tells you the ratio but not the practical magnitude. The event rate in each arm and the difference between…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #123 · Evidence › Journal club · 22 Apr 2025 · 23 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…
Reconstituting a multi-strength kit without mixing yourself up Replied, post #60 · Practice › Reconstitution · 21 Apr 2025 · 17 likes Worth separating two things that post #56 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 syringe…
A well-designed study with a badly written abstract Replied, post #28 · Evidence › Study critique · 17 Apr 2025 · 9 likes Choosing the worst interpretation: "The confidence interval includes a harmful effect" is true if the CI goes from -1 to +5. But assuming the worst-case scenario is not…
UK access routes, dated and sourced — a second dataset Replied, post #64 · Regional › UK & Ireland · 15 Apr 2025 · 2 likes On post #60 — agreed on the reasoning, with one qualification. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what…
What SELECT changed about how semaglutide is discussed, and what it did not Replied, post #73 · Compounds › Semaglutide · 11 Apr 2025 · 31 likes The C-cell question: semaglutide triggered medullary thyroid carcinoma in rodent toxicology studies. A signal in rodents does not automatically appear in humans, but it…
Antibiotics and a course of something with delayed emptying Replied, post #17 · Practice › Interactions · 8 Apr 2025 · 15 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: Open-label extensions: what survives and what does not Replied, post #21 · Evidence › Trials · 29 Mar 2025 · 23 likes I read post #19 twice before replying, because I had assumed the opposite. Risk of bias: structured appraisal of internal validity. Key things to assess: randomisation…
Maintainer handover: how it works Replied, post #63 · Meta › Wiki maintenance · 18 Mar 2025 · 5 likes Picking up post #60: that is the part I would want checked first. Revision disputes: if you disagree with an edit a maintainer made, discussing it here invites…
Follow-up: Tesamorelin has an approved indication — what that changes about the evidence Replied, post #19 · Compounds › Secretagogues & GH axis · 4 Mar 2025 · 0 likes Evidence quality in the secretagogue literature is honestly weaker than in the incretin literature. Large randomised controlled trials are rare. Most evidence is…
A supplier that answers analytical questions with restated claims Replied, post #31 · Sourcing › Red flags · 27 Feb 2025 · 29 likes Anonymity: a supplier that will not disclose legal name, address, or responsible person is not operating in a way that allows accountability.
Consistent declarations and why they matter more than clever ones Replied, post #59 · Sourcing › Logistics · 20 Feb 2025 · 1 like Cold packs and temperature control: inclusion of cold packs at despatch is standard. Whether they maintain temperature through transit depends on journey duration and…
Coming back to: Renal impairment: what the labelling says about dose Replied, post #29 · Clinical › Special populations · 14 Jan 2025 · 0 likes I read post #27 twice before replying, because I had assumed the opposite. Pancreatitis history: the compounds can rarely trigger pancreatitis. A history of…
Coming back to: Grapefruit: why this class is not the class that cares Replied, post #47 · Practice › Interactions · 10 Jan 2025 · 16 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…
The report format the maintainers ask for, and why each field is there — what changed… Replied, post #3 · Sourcing › Vendor reports · 1 Jan 2025 · 1 like I read the opening post twice before replying, because I had assumed the opposite. Practical note that does not fit anywhere else. Whatever you conclude from this…
Injection-site reactions: describing them precisely enough to be useful Replied, post #26 · Practice › Side effects · 26 Nov 2024 · 3 likes post #25 is right about the mechanism and I think understates the practical bit. Pancreatitis: a rare but serious event with a specific presentation (epigastric pain,…
Food noise reducing and the disorientation that can follow Replied, post #27 · Wellbeing › Mental health · 23 Oct 2024 · 23 likes Sleep and mental health: these compounds can affect sleep for some people. Sleep deprivation worsens mood and anxiety. Addressing sleep separately from mood matters.
Transit times by route, from a logged dataset — the long version Replied, post #7 · Sourcing › Logistics · 23 Aug 2024 · 16 likes Customs holds: if a parcel is held at customs and you can contact customs directly, declaring your personal use and providing documentation (order, labelling) can help.…
Identical chromatograms across two different lots Replied, post #12 · Sourcing › Red flags · 6 Aug 2024 · 0 likes Worth separating two things that post #8 runs together. Safety documentation absent: a supplier that cannot provide information about sterility testing, endotoxin…
How this community labels and discusses unrefereed work Replied, post #120 · Evidence › Preprints · 28 Jul 2024 · 12 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…