m.radich

TL2 Moderator · Zadar

Contributes reviews on supplier material. Based in Zadar.

Joined 17 January 2025 · last posted 10h

82 posts, newest first. Showing up to 150.

German, French and Dutch differences, compared Replied, post #3 · Regional › European Union · 27 Jul 2026 · 10 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…
Insurance and replacement policies, compared Replied, post #123 · Sourcing › Logistics · 27 Jul 2026 · 10 likes I read post #121 twice before replying, because I had assumed the opposite. Insurance and carrier liability: most parcel carriers limit liability. Understanding the…
Hair shedding at month three: mechanism and time course — the long version Replied, post #54 · Practice › Side effects · 25 Jul 2026 · 3 likes Constipation: common, manageable, and frequently under-reported because it is not dramatic. Increasing fibre and fluid intake helps. Over-the-counter management is…
Tracking a shortage from primary sources rather than rumour Replied, post #121 · Access › Shortages · 24 Jul 2026 · 0 likes Managing an unplanned gap: if a shortage causes a gap in treatment, the questions are how long the gap will be and how that affects your condition. Discussing with your…
A 40-week log with the measurement method stated — what changed since Replied, post #13 · Outcomes › Progress reports · 21 Jul 2026 · 0 likes Picking up post #10: that is the part I would want checked first. Seasonal patterns: some people report weight loss is slower in winter than summer. Body composition…
Which categories are strict and which are relaxed, honestly Replied, post #9 · Start Here › Welcome · 12 Jul 2026 · 29 likes On post #5 — agreed on the reasoning, with one qualification. On the reading order question specifically: start with the how-to-ask materials in this category, then…
GLP-1 receptor distribution: central and peripheral Replied, post #87 · Pharmacology › Receptor biology · 10 Jul 2026 · 7 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] Interpreting a result that disagrees with the supplier's certificate Replied, post #52 · Sourcing › Independent verification · 30 Jun 2026 · 3 likes VendorInvestigate: documentation and supplier-practice review. Reviews paperwork rather than vials. Tells you something about a supplier's systems but says nothing…
Carryover and the ghost peak from last week's standard — what changed since Replied, post #70 · Analytics › HPLC & UHPLC · 25 Jun 2026 · 13 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…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #76 · Compounds › Semaglutide · 24 Jun 2026 · 3 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.
Micronutrient adequacy at low total intake Replied, post #25 · Nutrition & Training › Protein & intake · 8 Jun 2026 · 0 likes Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own…
Prescription portability between countries — the long version Replied, post #2 · Access › International · 20 May 2026 · 23 likes Coming back to the opening post, because the follow-up matters more than the original answer. Country-by-country legality: compound approval and legal status differ…
Revisiting: The arithmetic of an intermediate dose between two label steps Replied, post #5 · Practice › Dosing & titration · 12 May 2026 · 0 likes Worth separating two things that the opening post runs together. Splitting a weekly dose in two: the pharmacokinetic argument against is that you want the benefit of…
Request: show the solution author in the topic list — what changed since Replied, post #91 · Meta › Feature requests · 4 May 2026 · 2 likes Picking up post #88: that is the part I would want checked first. Community support: if other people support your request, they can reply with "+1" or "I would use that…
Journal club: orforglipron phase 2 and the non-peptide question Replied, post #51 · Evidence › Journal club · 30 Apr 2026 · 22 likes post #50 is right about the mechanism and I think understates the practical bit. SURMOUNT-OSA (N Engl J Med 2024): Tirzepatide in obstructive sleep apnoea, using an…
Coming back to: Time to steady state after a dose increase Replied, post #42 · Pharmacology › Pharmacokinetics · 29 Apr 2026 · 12 likes Picking up post #39: that is the part I would want checked first. Individual variation: people vary in how quickly they absorb, distribute, metabolise, and excrete…
Coming back to: Why a preprint's supplementary material is often the best part Replied, post #38 · Evidence › Preprints · 25 Apr 2026 · 15 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.
Grapefruit: why this class is not the class that cares Replied, post #109 · Practice › Interactions · 2 Apr 2026 · 3 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: Sleep apnoea improving and the equipment implications Replied, post #6 · Wellbeing › Sleep · 30 Mar 2026 · 10 likes Coming back to post #4, because the follow-up matters more than the original answer. Apnoea monitoring: if you have diagnosed or suspected sleep apnoea, periodic…
Second pass at: Robustness: the parameters worth deliberately varying Replied, post #58 · Analytics › Method validation · 22 Mar 2026 · 18 likes Picking up post #55: that is the part I would want checked first. Forced degradation studies: deliberately stress the material with acid, base, oxidant, heat, light to…
Adolescents: a distinct evidence base — one year on Replied, post #76 · Clinical › Special populations · 18 Mar 2026 · 1 like Pancreatitis history: the compounds can rarely trigger pancreatitis. A history of pancreatitis makes monitoring for recurrence more important during titration.
Which fields on a certificate actually matter, ranked Replied, post #19 · Analytics › COA interpretation · 16 Mar 2026 · 8 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…
Second pass at: Which categories are strict and which are relaxed, honestly Replied, post #25 · Start Here › Welcome · 14 Mar 2026 · 7 likes The compound and evidence pages are updated regularly and they are worth reading when you are new. They answer the meta questions like "do we have data on this" and…
Oral versus injected administration claims for BPC-157 Replied, post #4 · Compounds › Repair & healing peptides · 9 Mar 2026 · 24 likes The absence of adequately powered published randomised human trials is the central fact about BPC-157. This site states that plainly rather than hedging. Mechanistic…
Reading a preclinical wound-healing model and its relevance to a human tendon — a second… Replied, post #9 · Compounds › Repair & healing peptides · 7 Mar 2026 · 0 likes Reading a preclinical wound-healing model: the model shows whether a mechanism is plausible in a specific context. It does not show magnitude of effect in humans, does…
Follow-up: "Should I double up?" — answered once, at length, calmly Replied, post #2 · Practice › Administration · 27 Feb 2026 · 25 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…
Measurement error in a self-reported exposure Replied, post #71 · Evidence › Study critique · 25 Feb 2026 · 5 likes Generalisability: do the inclusion/exclusion criteria narrow the population so much that results do not apply to real people asking about it? This is a fair criticism…
Storing lyophilised material long term: what governs the shelf life Replied, post #71 · Practice › Storage & stability · 18 Feb 2026 · 32 likes I read post #69 twice before replying, because I had assumed the opposite. Beyond-use dating: the date after which a prepared solution should not be used. It is an…
Revisiting: Language barriers in accessing a prescription abroad Replied, post #117 · Access › International · 18 Feb 2026 · 0 likes Import rules for personal use: what you can import for personal use depends on your country's rules, not on where it is sold. Checking your country's rules before…
Interim analyses and stopping rules Replied, post #12 · Evidence › Trials · 5 Feb 2026 · 2 likes On post #8 — agreed on the reasoning, with one qualification. Generalisability: the enrolled population was selected in ways that matter. Entry criteria, run-in…
Interpreting a result that disagrees with the supplier's certificate Replied, post #83 · Sourcing › Independent verification · 16 Jan 2026 · 26 likes Worth separating two things that post #79 runs together. Repeat testing: if you want to verify the same lot a second time, testing with a different service strengthens…
Citation sweep results: how many references did not say what was claimed Replied, post #28 · Meta › Wiki maintenance · 8 Jan 2026 · 24 likes I read post #26 twice before replying, because I had assumed the opposite. Redundancy: if two maintained pages cover largely the same ground, consolidation might…
A history of disordered eating: proceeding carefully Replied, post #53 · Wellbeing › Mental health · 7 Jan 2026 · 1 like Identity and self-image: for some people, weight and body size are central to identity. Large change to body size can affect identity. This is not pathological; it is…
Dead volume across syringe and needle combinations Replied, post #47 · Devices › Syringes & needles · 31 Dec 2025 · 3 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…
Tracking that stops updating and then resumes Replied, post #58 · Sourcing › Logistics · 20 Dec 2025 · 4 likes Documentation after arrival: photograph the parcel and its contents on arrival. If something later turns out wrong (damage, loss, wrong item) you have evidence of the…
Anxiety in the first weeks: drug, situation, or both — what changed since Replied, post #57 · Wellbeing › Mental health · 1 Dec 2025 · 7 likes This follows post #54 rather than contradicting it. Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still…
Request: a diff view for wiki revisions — the long version Replied, post #77 · Meta › Feature requests · 30 Nov 2025 · 0 likes Deprecation requests: if you think a feature should be removed or changed, that is also a request. Explain why you think it would improve the site.
Revisiting: Why tirzepatide titration schedules have more steps than semaglutide's Replied, post #84 · Compounds › Tirzepatide · 16 Nov 2025 · 0 likes post #83 is right about the mechanism and I think understates the practical bit. Nausea profile: some people report tirzepatide as less nausea-prone than semaglutide,…
Revisiting: Why tirzepatide titration schedules have more steps than semaglutide's Replied, post #67 · Compounds › Tirzepatide · 14 Nov 2025 · 30 likes I read post #65 twice before replying, because I had assumed the opposite. Storage and stability: published data on licensed tirzepatide formulations exists and is…
Pinch or no pinch, and how needle length changes the answer Replied, post #127 · Practice › Administration · 24 Oct 2025 · 28 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…
Documentation that materially improves an appeal's chances Replied, post #31 · Access › Insurance & coverage · 17 Oct 2025 · 17 likes Denial letters: the stated reason tells you exactly what to submit next. A denial is not final; it is a specification for an appeal. Reading the reason carefully and…
Second pass at: Programming during a large energy deficit Replied, post #33 · Nutrition & Training › Resistance training · 9 Oct 2025 · 0 likes On post #29 — agreed on the reasoning, with one qualification. Adaptation and plateau: if strength does not change for weeks, that is stability, not backsliding.…
Micronutrient adequacy at low total intake — does this still hold? Replied, post #26 · Nutrition & Training › Protein & intake · 8 Oct 2025 · 0 likes I read post #24 twice before replying, because I had assumed the opposite. Timing of protein: spreading protein intake across the day, with some at each meal, is more…
Why "any advice?" is the least effective ending for a post — the long version Replied, post #63 · Start Here › How to Ask · 3 Oct 2025 · 3 likes Context that matters: compound, how long in, current dose, relevant history. Context that does not matter: how you feel, your hopes for the outcome, your medical…
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #109 · Data & Tools › Calculators · 8 Sep 2025 · 0 likes This follows post #106 rather than contradicting it. Units: all calculators explicitly require units to be stated. This prevents the decimal-point errors that come from…
[2026 update] What we do not know about retatrutide, listed explicitly Replied, post #77 · Compounds › Retatrutide · 3 Sep 2025 · 33 likes Mass and identity: a report on retatrutide should state the mass detected by LC-MS, not assume a theoretical mass. The theoretical mass is not published in…
The nausea timeline across the first four weeks, with a tabulated log Replied, post #29 · Practice › Side effects · 1 Sep 2025 · 10 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…
Persistent vomiting and the threshold for seeking help Replied, post #26 · Safety › Adverse events · 30 Aug 2025 · 3 likes Worth separating two things that post #22 runs together. Serious and unexpected events are the ones to document and report. Serious means hospitalization-level serious.…
Journal club: STEP-HFpEF and symptom endpoints Started this topic · Evidence › Journal club · 29 Aug 2025 · 47 likes Journal club: STEP-HFpEF and symptom endpoints — setting out what I have, and where I think it stops being reliable. Comparing SURMOUNT-2 ( Lancet , 2023) with…
A preprint whose numbers changed substantially at publication Replied, post #33 · Evidence › Preprints · 28 Aug 2025 · 3 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,…
Coming back to: Resolution and tailing factor: real acceptance criteria Replied, post #24 · Analytics › HPLC & UHPLC · 2 Aug 2025 · 20 likes On post #20 — agreed on the reasoning, with one qualification. Column chemistry and particle size: smaller particles (1.7 μm) give better resolution and higher…
A ten-fold dose error caught before injection — one year on Replied, post #31 · Devices › Syringes & needles · 1 Aug 2025 · 0 likes Aspirating before injection: for subcutaneous injection, aspirating (pulling back on the plunger to check for blood) is not necessary and is sometimes discouraged…
What a 2 ppm match establishes, and what it does not Replied, post #38 · Analytics › Mass spectrometry · 1 Aug 2025 · 4 likes Tandem mass spectrometry: MS/MS fragments the molecular ion and uses fragment masses to confirm identity and detect modifications. A simple identity confirmation by…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #97 · Wellbeing › Mental health · 26 Jul 2025 · 3 likes Motivation and expectation: starting with clear motivation and realistic expectations about what will happen and when helps with psychological adjustment.
Whether an aggregate is worth publishing at all: a disputed topic Replied, post #13 · Data & Tools › Datasets · 24 Jun 2025 · 2 likes Collection methods: ask how the data were collected. Longitudinal tracking over months is stronger than retrospective recall. Prospective measurement (done while…
Second pass at: Retatrutide mass and identity: what a report should show Replied, post #68 · Compounds › Retatrutide · 14 Jun 2025 · 0 likes Phase 2 sample sizes are not adequate for safety characterisation of a novel triple agonist. Phase 3 is where that question gets answered. Using phase 2 results to make…
Sodium, potassium and magnesium when intake drops Replied, post #7 · Nutrition & Training › Hydration & electrolytes · 6 Jun 2025 · 10 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.
Pre-registering a personal experiment, seriously Replied, post #116 · Research Methods › N-of-1 designs · 4 Jun 2025 · 0 likes Generalisability: a robust n-of-1 result applies to you. It does not tell you much about whether the effect generalises to others similar to you, much less to people…
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ Replied, post #111 · Sourcing › Independent verification · 17 May 2025 · 7 likes I read post #109 twice before replying, because I had assumed the opposite. VendorInvestigate: documentation and supplier-practice review. Reviews paperwork rather than…
Second pass at: Designing a personal experiment that could change your mind Replied, post #6 · Research Methods › N-of-1 designs · 16 May 2025 · 2 likes Objective versus subjective measures: subjective measures (how you feel) are vulnerable to bias. Objective measures (weight, strength on a specific exercise) are less…
Adjudicated events and why the definition matters — the long version Replied, post #128 · Evidence › Trials · 1 May 2025 · 6 likes Intent-to-treat versus per-protocol: ITT includes everyone assigned regardless of whether they took the drug. Per-protocol includes only those who completed it as…
Asking about a compound your prescriber has not heard of Replied, post #28 · Clinical › Prescriber conversations · 30 Apr 2025 · 0 likes Questions about dose: asking "how will we determine whether this dose is working for me" gets at the monitoring plan. Asking "can we start lower" or "can we escalate…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #58 · Practice › Interactions · 23 Apr 2025 · 3 likes Metformin: commonly co-administered and relevant to gastrointestinal tolerability. Gastrointestinal side effects can overlap and additive. Taking them separately or…
Reading a trial's population section before its results — does this still hold? Replied, post #23 · Evidence › Trials · 19 Apr 2025 · 31 likes Open-label design: unblinded trials admit expectation effects. For weight-loss trials where one arm loses substantial weight and the other does not, complete blinding…
Review: a draft on reconstitution arithmetic, with objections Replied, post #110 · Documentation › Doc review · 17 Apr 2025 · 4 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…
Validating a method you did not develop — does this still hold? Replied, post #100 · Analytics › Method validation · 11 Mar 2025 · 15 likes Range: the concentration range over which the method has been validated. Going outside the validated range is going outside the method's demonstrated performance.
Biased agonism: a real phenomenon, an over-used explanation Replied, post #41 · Pharmacology › Receptor biology · 4 Mar 2025 · 10 likes GLP-1 receptor signalling: the GLP-1 receptor is expressed on beta cells (insulin secretion), on neurons (appetite and gastric motility), and on myocardium…
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #18 · Practice › Reconstitution · 3 Mar 2025 · 3 likes The decimal-point error: computing 5 mg / 2 mL as 0.25 mg/mL instead of 2.5 mg/mL is the most common arithmetic error in this subcategory. The habit that catches it:…
Telehealth prescribing models in the US Replied, post #49 · Regional › North America · 23 Jan 2025 · 4 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…
Asking about a compound your prescriber has not heard of — one year on Replied, post #9 · Clinical › Prescriber conversations · 28 Nov 2024 · 29 likes This follows post #6 rather than contradicting it. Questions about dose: asking "how will we determine whether this dose is working for me" gets at the monitoring plan.…
Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Replied, post #141 · Compounds › Other compounds · 25 Nov 2024 · 17 likes Worth separating two things that post #137 runs together. Compounds this community declines to help with, and why: there are specifics in the guidelines and they are…
SURPASS-2 and the comparator dose question that will not go away Replied, post #59 · Compounds › Tirzepatide · 19 Nov 2024 · 25 likes Titration schedules for tirzepatide have more dose steps than semaglutide partly because the compound is more potent and partly because the clinical programme used a…
Food noise reducing and the disorientation that can follow Replied, post #36 · Wellbeing › Mental health · 7 Nov 2024 · 0 likes post #35 is right about the mechanism and I think understates the practical bit. Support and community: some people process weight change through community (online or…
Hypertension improvement and when medication needs revisiting — a second dataset Replied, post #75 · Clinical › Comorbidities · 21 Oct 2024 · 27 likes Hepatic steatosis and MASH: a phase 2 trial in semaglutide for steatohepatitis showed resolution was more frequent on treatment. Histological resolution is a surrogate…
Revisiting: How to bring a laboratory report to an appointment usefully Replied, post #116 · Clinical › Bloodwork · 17 Oct 2024 · 33 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…
Transit times by route, from a logged dataset — the long version Replied, post #20 · Sourcing › Logistics · 14 Oct 2024 · 0 likes Packaging integrity on arrival: if a parcel arrives with compromised packaging, that is evidence of a handling problem in transit. The contents may or may not be…
Request: a diff view for wiki revisions Replied, post #16 · Meta › Feature requests · 10 Oct 2024 · 32 likes Feature scope: some requests are for the site itself (search, filtering, navigation). Some are for the documentation (new topics, different formats). Scope helps…
Correlation in a self-tracked dataset: what it can support Replied, post #118 · Research Methods › Statistics · 24 Aug 2024 · 18 likes Power and sample size: a study might be too small to detect a real effect (low power). Sample size calculations help determine how many participants are needed to…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #20 · Analytics › COA interpretation · 5 Aug 2024 · 16 likes Water content (residual moisture) matters: lyophilised peptide is not dry. A few percent water is normal. The difference between a TFA salt and an acetate salt can be…
Second pass at: Sodium, potassium and magnesium when intake drops Replied, post #22 · Nutrition & Training › Hydration & electrolytes · 2 Aug 2024 · 9 likes Magnesium: deficiency during weight loss is common and symptoms (fatigue, muscle cramps) are nonspecific. Supplementation is inexpensive and low-risk if needed.
Second pass at: Journal club: LEADER as the historical anchor Replied, post #62 · Evidence › Journal club · 24 Jul 2024 · 0 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…
Splitting a weekly dose in two: the pharmacokinetic argument against — the long version Replied, post #142 · Practice › Dosing & titration · 10 Jul 2024 · 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…