s.radich

TL2 Moderator · Medellín

Contributes reviews on supplier material. Based in Medellín.

Joined 1 September 2025 · last posted 1d

84 posts, newest first. Showing up to 150.

Travelling with an injectable: documentation and practicalities Replied, post #43 · Access › International · 27 Jul 2026 · 25 likes Insurance and coverage: coverage decisions are national. A compound approved in one country might not be covered by insurance in another. Checking both approval and…
Journal club: STEP 1 and the treatment-policy estimand Replied, post #3 · Evidence › Journal club · 18 Jul 2026 · 19 likes I read the opening post twice before replying, because I had assumed the opposite. FLOW (N Engl J Med 2024): Semaglutide renal outcomes in type 2 diabetes and chronic…
Alcohol: what is documented and what is folklore Replied, post #119 · Practice › Interactions · 18 Jul 2026 · 0 likes This follows post #116 rather than contradicting it. Thyroid medications: semaglutide is associated with a slowing of gastric emptying, which might affect thyroid…
I joined for one answer and stayed for a year — what changed my mind Replied, post #90 · Start Here › Welcome · 17 Jul 2026 · 32 likes On the reading order question specifically: start with the how-to-ask materials in this category, then read the one to three subcategories where your main questions…
Coming back to: Why a preprint's supplementary material is often the best part Replied, post #105 · Evidence › Preprints · 13 Jul 2026 · 0 likes On post #101 — agreed on the reasoning, with one qualification. Check whether it was later published: searching for the preprint's first author and keywords in PubMed…
What to bring: records that a clinician can actually use — a second dataset Started this topic · Clinical › Prescriber conversations · 1 Jul 2026 · 38 likes What to bring: records that a clinician can actually use — a second dataset I have a specific reason for asking rather than idle curiosity, and the context is below.…
Revisiting: Protein density versus volume when you cannot eat much Replied, post #21 · Nutrition & Training › Protein & intake · 30 Jun 2026 · 0 likes Fibre: adequate fibre intake supports fullness and gut motility, both of which matter during the gastrointestinal effects of these compounds. High fibre on top of…
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #54 · Evidence › Journal club · 23 Jun 2026 · 0 likes PIONEER 6 (N Engl J Med 2019): Cardiovascular safety trial for oral semaglutide, not efficacy. Non-inferiority for safety was met. The trial was not designed to…
Why the timeline is on the right and not the left — what changed since Replied, post #59 · Meta › Site feedback · 21 Jun 2026 · 0 likes Community norms: if you think a norm has drifted or is not being followed consistently, raising it here can prompt discussion and realignment.
Racemisation and why it is invisible to a mass measurement Replied, post #62 · Analytics › Impurities & related substances · 12 Jun 2026 · 0 likes Coming back to post #60, because the follow-up matters more than the original answer. Deletion sequences (incomplete coupling during synthesis): lower in mass by one…
Why fasting instructions for oral semaglutide are not optional advice Replied, post #38 · Compounds › Oral incretins · 12 Jun 2026 · 3 likes Fasting instructions are not optional advice. Taking the tablet with food or with more than a sip of water measurably reduces absorption. This is the one compound in…
Coming back to: Lateral-flow and colorimetric approaches: the specificity problem Replied, post #45 · Analytics › Home & field testing · 12 Jun 2026 · 10 likes Picking up post #42: that is the part I would want checked first. Colorimetric tests: colour intensity correlates with concentration, but the relationship is non-linear…
Second pass at: Programming during a large energy deficit Replied, post #23 · Nutrition & Training › Resistance training · 11 Jun 2026 · 4 likes post #22 answers the question as asked. The question underneath it is different. Programming while losing weight quickly: realistic expectations are crucial. Strength…
Revisiting: The best-written scientific paper you have read Replied, post #3 · Lounge › Off topic · 25 May 2026 · 21 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.
Batch numbers that do not match the vial label Replied, post #20 · Sourcing › Red flags · 24 May 2026 · 13 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…
Journal club: STEP 8 and the fairness of the comparator dose — a second dataset Replied, post #11 · Evidence › Journal club · 22 May 2026 · 28 likes I read post #9 twice before replying, because I had assumed the opposite. FLOW (N Engl J Med 2024): Semaglutide renal outcomes in type 2 diabetes and chronic kidney…
Lean mass preservation: what the evidence supports — does this still hold? Replied, post #80 · Outcomes › Body composition · 21 May 2026 · 32 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 plateau that disappeared when I changed how I measured — the long version Replied, post #40 · Outcomes › Progress reports · 20 May 2026 · 4 likes On post #36 — agreed on the reasoning, with one qualification. Longitudinal report with the method stated: same scale, same time of day, same conditions. A scale is a…
Review: an evidence digest and the citation check that delayed it Replied, post #7 · Documentation › Doc review · 19 May 2026 · 3 likes Fact-checking: if you see a factual claim in a maintained page that you have evidence contradicts, post the evidence here. The maintainer will review and correct if you…
Reading a home test result without over-claiming Replied, post #38 · Analytics › Home & field testing · 10 May 2026 · 6 likes I read post #36 twice before replying, because I had assumed the opposite. Why third-party testing is stronger: a home test run by the person who made the compound is a…
[2026 update] Charge states for a 4 kDa peptide, worked through Replied, post #130 · Analytics › Mass spectrometry · 1 May 2026 · 22 likes Purity and identity are different questions: LC-MS establishes that the species at a retention time has the expected mass. It does not establish how much of the sample…
Second pass at: What "verified" means on our vendor pages, stated narrowly Replied, post #101 · Sourcing › Vendor reports · 30 Apr 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.
Tracking intake honestly when appetite is absent Replied, post #9 · marked as the solution · Nutrition & Training › Protein & intake · 26 Apr 2026 · 9 likes This follows post #6 rather than contradicting it. Protein supplements: whey, casein, and plant-based protein powders can help hit targets when whole-food intake is…
List price versus negotiated price versus what you pay Replied, post #13 · Access › Pricing · 8 Apr 2026 · 30 likes Subscription services and subscriptions: some online clinics bundle compounds into subscription models with different pricing. Understanding the terms before committing…
Spreadsheets: an appreciation — what changed since Replied, post #13 · Lounge › Off topic · 6 Apr 2026 · 2 likes post #12 answers the question as asked. The question underneath it is different. Community norms: if you want to discuss how the community should work (not moderation…
Journal club: is percentage weight change the right endpoint? Replied, post #42 · Evidence › Journal club · 5 Apr 2026 · 0 likes This follows post #39 rather than contradicting it. SELECT (N Engl J Med 2023): Semaglutide cardiovascular outcomes without diabetes. The first outcome trial in people…
Prediction intervals and why they are more honest than confidence intervals Replied, post #3 · Evidence › Meta-analyses · 31 Mar 2026 · 27 likes Picking up post #2: that is the part I would want checked first. Fixed-effects versus random-effects models: fixed-effects assumes all studies are estimating the same…
Adducts: sodium, potassium, and the peak you did not expect — does this still hold? Replied, post #84 · Analytics › Mass spectrometry · 27 Mar 2026 · 12 likes Electrospray ionisation produces multiply charged ions. For a 4 kDa peptide you expect mostly 2+, 3+, and 4+ charge states. Reading an electrospray spectrum means…
GLP-1 receptor distribution: central and peripheral Replied, post #17 · Pharmacology › Receptor biology · 17 Mar 2026 · 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…
A staff appointment, and what the role involves Replied, post #2 · Meta › Announcements · 7 Mar 2026 · 21 likes Staff announcements, policy changes, and scheduled maintenance. Read-only except for questions clarifying what was announced.
Follow-up: Search filters: what is missing Replied, post #42 · Meta › Site feedback · 27 Feb 2026 · 19 likes Display issues: broken layouts, images not loading, text overlapping — report with the browser and device you were using. Display bugs are platform-specific.
Measurement error in a self-reported exposure Replied, post #103 · Evidence › Study critique · 27 Feb 2026 · 7 likes When you change your mind: if a reply convinces you that your criticism was not well-founded, say so plainly. The critique might still be real but smaller than you…
Measurement error in a self-reported exposure Replied, post #96 · Evidence › Study critique · 26 Feb 2026 · 1 like Publication bias: a single published positive trial is weaker evidence than multiple published trials with consistent results. Asking whether there are unpublished…
When a dose reduction is the correct response to a side effect Replied, post #2 · Practice › Dosing & titration · 23 Feb 2026 · 2 likes Worth separating two things that the opening post runs together. Reaching a dose and staying there for a year: the question of whether a stable dose remains effective…
Designing a personal experiment that could change your mind — one year on Replied, post #13 · Research Methods › N-of-1 designs · 21 Feb 2026 · 19 likes Sample size in n-of-1: you are the sample. Repeated measurements (weekly weighings, daily mood scores) increase the power to detect a real effect even though n=1.
Mass error in ppm: the arithmetic and the caveat Replied, post #76 · Analytics › Mass spectrometry · 14 Feb 2026 · 12 likes I read post #74 twice before replying, because I had assumed the opposite. Electrospray ionisation produces multiply charged ions. For a 4 kDa peptide you expect mostly…
[2026 update] Storing lyophilised material long term: what governs the shelf life Replied, post #62 · Practice › Storage & stability · 6 Feb 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…
Absence of evidence and evidence of absence Replied, post #15 · Research Methods › Statistics · 29 Jan 2026 · 10 likes post #14 is right about the mechanism and I think understates the practical bit. Number needed to treat: how many people need to be treated to prevent one bad outcome…
Stepping down deliberately, and how to do it without losing progress Replied, post #46 · Practice › Dosing & titration · 22 Jan 2026 · 1 like Micro-titration: the concept of increments smaller than the labelled steps. It has no evidence base from trials but is described by some people. The downside is that…
EU-wide position versus national implementation — what changed since Replied, post #12 · Regional › European Union · 3 Jan 2026 · 0 likes Worth separating two things that post #8 runs together. France: ANSM implements EU framework. Reimbursement has been narrower for weight management. Prescribing…
Interpreting a result that disagrees with the supplier's certificate Replied, post #37 · Sourcing › Independent verification · 9 Dec 2025 · 9 likes post #36 answers the question as asked. The question underneath it is different. Janoshik Analytical: chromatographic purity and mass-spectrometric identity on…
[2026 update] What steady state means for the decision to escalate Replied, post #102 · Practice › Dosing & titration · 15 Nov 2025 · 2 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…
Gauge and length selection for subcutaneous injection Replied, post #45 · Devices › Syringes & needles · 30 Oct 2025 · 8 likes Coming back to post #43, because the follow-up matters more than the original answer. Aspirating before injection: for subcutaneous injection, aspirating (pulling back…
Anxiety in the first weeks: drug, situation, or both — what changed since Replied, post #39 · Wellbeing › Mental health · 18 Oct 2025 · 28 likes 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…
Second pass at: Journal club: STEP 4 and what a withdrawal design can prove Replied, post #80 · Evidence › Journal club · 18 Oct 2025 · 0 likes Critical appraisal template: (1) What did the trial set out to estimate? (2) Could the design answer that question? (3) Was the population sufficiently similar to your…
Availability by country, dated, with primary sources Replied, post #21 · Access › International · 15 Oct 2025 · 9 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…
Compounds this community declines to help with, and why Replied, post #4 · Compounds › Other compounds · 23 Sep 2025 · 1 like When "no data" is the complete and final answer: if there is no published human data on a compound, that is the state of knowledge. Hope is not a substitute and…
Second pass at: Triple agonism: additive, synergistic, or neither? Replied, post #112 · Compounds › Retatrutide · 16 Sep 2025 · 5 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…
What a 2 ppm match establishes, and what it does not Replied, post #50 · Analytics › Mass spectrometry · 12 Sep 2025 · 3 likes Worth separating two things that post #46 runs together. What mass accuracy establishes: the measured mass is consistent with a specific composition. What it does not…
Reaching a dose and staying there for a year: a longitudinal note — does this still hold? Replied, post #40 · Practice › Dosing & titration · 11 Sep 2025 · 4 likes Picking up post #37: that is the part I would want checked first. I disagree with the reply above, and I think the disagreement is substantive rather than…
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #14 · Lounge › Off topic · 31 Aug 2025 · 0 likes post #13 is right about the mechanism and I think understates the practical bit. Adjacent and interesting: you might post something about nutrition, bioavailability…
[2026 update] Splitting an overlong document into two Replied, post #25 · Documentation › Wiki requests · 18 Aug 2025 · 30 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…
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #74 · Access › Insurance & coverage · 9 Aug 2025 · 33 likes This follows post #71 rather than contradicting it. I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The…
A ten-fold dose error caught before injection — one year on Replied, post #53 · Devices › Syringes & needles · 2 Aug 2025 · 7 likes Needle gauge: smaller numbers (30G) are finer and less painful. Larger numbers (25G) are courser. For subcutaneous injection, 27-30G is typical. Finer needles take…
A comparison of home results against a laboratory result on the same vial Replied, post #14 · Analytics › Home & field testing · 14 Jul 2025 · 4 likes Enzyme assays: if you have an enzyme that reacts specifically with your compound, an enzyme-based assay can work. These are sometimes available commercially but are…
A checklist for reading a certificate in under two minutes — does this still hold? Replied, post #18 · Analytics › COA interpretation · 30 Jun 2025 · 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…
Semaglutide versus liraglutide head to head: reading STEP 8 carefully Replied, post #20 · Compounds › Semaglutide · 29 Jun 2025 · 2 likes post #19 is right about the mechanism and I think understates the practical bit. The SELECT trial changed the positioning because it was the first cardiovascular…
Area percent versus weight percent: the confusion that causes most arguments — what… Replied, post #21 · Analytics › HPLC & UHPLC · 25 Jun 2025 · 15 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…
Checking someone else's arithmetic: a worked example thread Replied, post #59 · Practice › Reconstitution · 20 Jun 2025 · 0 likes post #58 answers the question as asked. The question underneath it is different. A 10 mg vial reconstituted three different ways: 1 mL diluent gives 10 mg/mL, 2 mL…
Journal club: indirect comparison between two programmes, defended and attacked — one… Replied, post #13 · Evidence › Journal club · 9 Jun 2025 · 0 likes Worth separating two things that post #9 runs together. Session format: read the paper before posting. The discussion is much better when everyone has. Start with the…
Coming back to: Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #15 · Compounds › Semaglutide · 3 Jun 2025 · 24 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…
Residual solvents and scavengers: what is looked for Replied, post #17 · Analytics › Impurities & related substances · 27 Apr 2025 · 0 likes Coming back to post #15, because the follow-up matters more than the original answer. Two things before anyone answers the substance. First, the context in the first…
What SELECT changed about how semaglutide is discussed, and what it did not Replied, post #86 · Compounds › Semaglutide · 21 Apr 2025 · 22 likes The SELECT trial changed the positioning because it was the first cardiovascular outcome trial in people without diabetes. That decoupled the cardiovascular argument…
Coming back to: Why quantitation is the hard part, not detection Replied, post #7 · Analytics › Home & field testing · 16 Apr 2025 · 26 likes This follows post #4 rather than contradicting it. What physical quantity does the device measure? A colorimetric or lateral-flow method typically responds to a class…
Review: a draft on reconstitution arithmetic, with objections Replied, post #91 · Documentation › Doc review · 5 Apr 2025 · 2 likes post #90 answers the question as asked. The question underneath it is different. Fact-checking: if you see a factual claim in a maintained page that you have evidence…
A promotion I argued against, and why I lost Replied, post #160 · Documentation › Doc review · 4 Apr 2025 · 13 likes Multilingual versions: if a maintained page should exist in another language, suggesting it here with your willingness to help translate can make it happen.
Reading order for a first week here, and what to skip until later Replied, post #52 · Start Here › Welcome · 25 Mar 2025 · 11 likes Worth separating two things that post #48 runs together. The moderation log is public. Every staff action is logged with the rule cited and the reasoning stated. If you…
One lot is one lot: when a report becomes a pattern — the long version Replied, post #139 · Sourcing › Vendor reports · 19 Mar 2025 · 5 likes Structured report format: compound, lot, independent testing service, method as reported, result, and the certificate figure for the same lot. One lot is one lot. It…
What we do not know about retatrutide, listed explicitly Replied, post #101 · Compounds › Retatrutide · 18 Feb 2025 · 0 likes What we do not know about retatrutide, listed explicitly: long-term safety, real-world response rates, the dose response in diverse populations, whether the heart-rate…
Protein density versus volume when you cannot eat much Replied, post #86 · Nutrition & Training › Protein & intake · 7 Feb 2025 · 0 likes I read post #84 twice before replying, because I had assumed the opposite. Leucine and MPS: leucine stimulates muscle protein synthesis at a threshold of roughly 2 to 3…
Second pass at: Pharmacy supply in the UK and the questions you will be asked Replied, post #12 · Regional › UK & Ireland · 24 Jan 2025 · 0 likes Supply and shortage resilience: both UK and Ireland sourced primarily from European suppliers until recent disruptions. Domestic availability and pricing changed.
Drawing from a pen cartridge with a syringe: how the risk profile changes Replied, post #3 · Devices › Pens & autoinjectors · 7 Jan 2025 · 22 likes Reusability: some pens are single-use (throw away after one injection). Others can be reused until empty. Confirm which type you have. Reusing a single-use pen is…
What a stability-indicating method is and how you demonstrate one — one year on Replied, post #110 · Analytics › Method validation · 4 Jan 2025 · 0 likes Worth separating two things that post #106 runs together. Forced degradation studies: deliberately stress the material with acid, base, oxidant, heat, light to generate…
Oral semaglutide bioavailability and its variability between people — a second dataset Replied, post #26 · Compounds › Oral incretins · 25 Dec 2024 · 4 likes Picking up post #23: that is the part I would want checked first. Why an oral formulation is a formulation achievement: the molecule is the same but the tablet is…
[2026 update] New subcategory: rationale and scope Replied, post #70 · Meta › Announcements · 16 Dec 2024 · 16 likes This follows post #67 rather than contradicting it. Feedback to announcements: if you have feedback on an announced change (not a question, but your position) post it…
Injection-site reactions: describing them precisely enough to be useful Replied, post #13 · Practice › Side effects · 19 Nov 2024 · 0 likes I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The distinction being drawn does not survive when you look at…
Athletes in weight-category sports: a different risk calculus — a second dataset Replied, post #9 · Clinical › Special populations · 4 Nov 2024 · 7 likes Picking up post #6: that is the part I would want checked first. Medullary thyroid carcinoma history: an absolute contraindication because of the preclinical findings…
US compounding rules and how they changed Replied, post #48 · Regional › North America · 30 Oct 2024 · 7 likes Private insurance gaps: some people have private insurance but medication is not covered. Manufacturer assistance programmes are the main resource for cost reduction.
Research-use-only status: what it means legally and practically — a second dataset Replied, post #4 · marked as the solution · Compounds › Other compounds · 16 Oct 2024 · 7 likes Reading a supplier's product description as a marketing document: that is exactly what it is. The hyperbole, the mechanism written as fact, the theoretical benefits…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #48 · Analytics › COA interpretation · 7 Sep 2024 · 1 like post #47 answers the question as asked. The question underneath it is different. When a document puts the specification in the result column, it has told you the…
Guidelines revision: what changed and why Replied, post #134 · Meta › Announcements · 29 Jul 2024 · 0 likes When announcements are made: major policy changes, technical changes affecting site function, planned downtime, and changes to guidelines all get announced here.
Where the four-week escalation interval comes from, and what it is not Replied, post #57 · Practice › Dosing & titration · 23 Jul 2024 · 27 likes Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
Journal club: FLOW and the renal composite, component by component Replied, post #48 · Evidence › Journal club · 13 Jul 2024 · 33 likes On post #44 — agreed on the reasoning, with one qualification. SOUL (N Engl J Med 2025): Oral semaglutide cardiovascular outcomes. Extends the cardiovascular evidence…
Two sessions a week versus four: what the evidence supports — a second dataset Replied, post #10 · Nutrition & Training › Resistance training · 14 Jun 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…