v.bergstrom

TL2 Moderator · Rennes

Contributes reviews on supplier material. Based in Rennes.

Joined 21 July 2025 · last posted 2d

89 posts, newest first. Showing up to 150.

Programming during a large energy deficit Replied, post #50 · Nutrition & Training › Resistance training · 26 Jul 2026 · 7 likes Post-weight-loss training: once weight loss is complete and energy deficit ends, training can shift to building again. The transition from preservation mode to building…
Why cagrilintide alone is discussed so much less than in combination — does this still… Replied, post #29 · Compounds › Cagrilintide & amylin analogues · 22 Jul 2026 · 5 likes Picking up post #26: that is the part I would want checked first. What is genuinely unknown about long-term amylin agonism: real-world response rates, whether effect is…
Revisiting: Protein density versus volume when you cannot eat much Replied, post #91 · Nutrition & Training › Protein & intake · 22 Jul 2026 · 0 likes Liquid versus solid: protein in liquid form (shakes) is easier to consume in volume but might not be as satiating as solid food. Using both together can help.
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #92 · Evidence › Journal club · 9 Jul 2026 · 32 likes SURMOUNT-1 (N Engl J Med 2022): Tirzepatide obesity trial. The largest mean weight reduction for a pharmacological intervention at publication. Read the categorical…
Revisiting: What pooling buys you and what it destroys Replied, post #83 · Evidence › Meta-analyses · 8 Jul 2026 · 18 likes post #82 is right about the mechanism and I think understates the practical bit. For anyone arriving from a search: the marked solution above is the direct answer, and…
[2026 update] Journal club: what we got wrong in an earlier session Replied, post #4 · Evidence › Journal club · 1 Jul 2026 · 0 likes post #3 is right about the mechanism and I think understates the practical bit. For anyone arriving from a search: the marked solution above is the direct answer, and…
Why side effects reset at each escalation and that is not a failure Replied, post #3 · Practice › Side effects · 1 Jul 2026 · 17 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…
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #47 · Sourcing › Independent verification · 27 Jun 2026 · 3 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…
Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #29 · Analytics › Impurities & related substances · 27 Jun 2026 · 0 likes Incomplete deprotection: mass higher by the protecting group mass. Usually markedly later eluting. A synthesis artifact from incomplete removal of protecting groups.
Stepping down deliberately, and how to do it without losing progress — what changed since Replied, post #19 · Practice › Dosing & titration · 26 Jun 2026 · 2 likes The four-week escalation interval is a convention from the pivotal trials, not a pharmacological constant. The pharmacological argument is that with a week-long…
Why fasting instructions for oral semaglutide are not optional advice Replied, post #60 · Compounds › Oral incretins · 26 Jun 2026 · 10 likes Worth separating two things that post #56 runs together. PIONEER 6 was a cardiovascular safety trial for oral semaglutide, not an efficacy trial. Non-inferiority for…
Second pass at: Programming during a large energy deficit Replied, post #33 · Nutrition & Training › Resistance training · 18 Jun 2026 · 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…
Spreadsheets: an appreciation — what changed since Replied, post #72 · Lounge › Off topic · 16 Jun 2026 · 25 likes Humour: light, relevant humour is welcome. Cruel humour targeting individuals or groups is not.
GLP-1 receptor distribution: central and peripheral Replied, post #67 · Pharmacology › Receptor biology · 11 Jun 2026 · 24 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…
What to include when your question involves a chromatogram — one year on Replied, post #29 · Start Here › How to Ask · 7 Jun 2026 · 5 likes Avoid "any advice?" at the end. It is so generic that people do not know which part of the post it refers to. Pick the specific part and ask that specific question…
Official shortage notices and what they authorise Replied, post #84 · Access › Shortages · 3 Jun 2026 · 6 likes I read post #82 twice before replying, because I had assumed the opposite. Compounding during shortages: some jurisdictions allow pharmacy compounding when a marketed…
Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #36 · Analytics › HPLC & UHPLC · 2 Jun 2026 · 0 likes Detection wavelength: 214 nm detects the peptide bond and is relatively insensitive to composition. 280 nm detects aromatic residues and is strongly…
Risk-of-bias tools and the judgement they conceal — does this still hold? Replied, post #11 · Evidence › Meta-analyses · 1 Jun 2026 · 16 likes I read post #9 twice before replying, because I had assumed the opposite. Why forest plots are more informative than pooled numbers: they show the variation across…
Request: show the solution author in the topic list — what changed since Replied, post #59 · Meta › Feature requests · 3 May 2026 · 2 likes Requests for platform and documentation features, with the reasoning that justifies them. If you think the site would be better with a feature, suggest it with enough…
Private prescribing in the UK: what is actually involved Replied, post #3 · Regional › UK & Ireland · 23 Apr 2026 · 0 likes post #2 is right about the mechanism and I think understates the practical bit. Occupational health screening: some UK occupations require medical checks. Disclosure of…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #36 · Evidence › Journal club · 21 Apr 2026 · 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…
[2026 update] A vial that will not fully dissolve: what to check and in what order Replied, post #9 · Practice › Reconstitution · 13 Apr 2026 · 7 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…
Coming back to: Training through a dose escalation week Replied, post #74 · Nutrition & Training › Resistance training · 8 Apr 2026 · 20 likes post #73 answers the question as asked. The question underneath it is different. Adaptation and plateau: if strength does not change for weeks, that is stability, not…
[2026 update] 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #7 · Devices › Syringes & needles · 3 Apr 2026 · 0 likes Reading units correctly: look at the marking from the side, not from above or below. The bottom of the plunger tip is the reading. Parallax error (wrong angle) is a…
Oral versus injected administration claims for BPC-157 Replied, post #23 · Compounds › Repair & healing peptides · 16 Mar 2026 · 29 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…
Nausea profile of amylin analogues compared with GLP-1 agonists Replied, post #47 · Compounds › Cagrilintide & amylin analogues · 7 Mar 2026 · 0 likes Is synergy the right word for the combination data? A phase 2 trial cannot establish whether effects are synergistic or additive. Synergy is a mechanistic claim that…
[2026 update] Composite endpoints and the component doing the work Replied, post #20 · Evidence › Trials · 5 Mar 2026 · 31 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.
MS/MS sequence confirmation: what it costs and when it is worth it — what changed since Replied, post #5 · Analytics › Mass spectrometry · 26 Feb 2026 · 5 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…
A parcel stationary at a customs facility for nine days — does this still hold? Replied, post #6 · Sourcing › Logistics · 21 Feb 2026 · 16 likes Picking up post #3: that is the part I would want checked first. Packaging integrity on arrival: if a parcel arrives with compromised packaging, that is evidence of a…
Second pass at: Circumference measurements as a poor man's composition estimate Replied, post #53 · Outcomes › Body composition · 12 Feb 2026 · 25 likes Changes during titration: measuring body composition during active titration is less useful than measuring after dose is stable. Titration causes fluid shifts that…
Guidelines revision: what changed and why — one year on Replied, post #69 · Meta › Announcements · 11 Feb 2026 · 25 likes When announcements are made: major policy changes, technical changes affecting site function, planned downtime, and changes to guidelines all get announced here.
[2026 update] Confounding by indication, explained with a concrete example Replied, post #33 · Evidence › Study critique · 7 Feb 2026 · 6 likes Defending a paper against criticism: if the authors respond, they might clarify something the paper explained poorly. Their response might also miss your point. Either…
Revisiting: Absolute versus relative contraindications Replied, post #14 · Safety › Contraindications · 4 Feb 2026 · 11 likes Medullary thyroid carcinoma (personal or family history) or multiple endocrine neoplasia type 2: absolute contraindication. The rodent preclinical signal is real enough…
Trifluoroacetate content and its consequences Replied, post #43 · Analytics › Impurities & related substances · 29 Jan 2026 · 1 like Acetate content: counter-ion content. Trifluoroacetate or acetate from the salt form of the peptide. Affects mass calculations and should be stated on a complete…
Follow-up: Search filters: what is missing Replied, post #14 · Meta › Site feedback · 13 Jan 2026 · 13 likes Picking up post #11: that is the part I would want checked first. Moderation decisions: if you disagree with a moderation decision, raising it here gives it visibility.…
A partial dose because the pen emptied mid-injection Replied, post #98 · Practice › Administration · 10 Jan 2026 · 8 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…
Sleep quality changes during weight loss — what changed since Replied, post #69 · Wellbeing › Sleep · 19 Nov 2025 · 27 likes Sleep apnoea improvement: as weight is lost, sleep apnoea usually improves. The timeframe is weeks to months, not immediate. Improvement often is gradual rather than…
Pen mechanics when the cartridge is nearly empty — does this still hold? Replied, post #17 · Devices › Pens & autoinjectors · 15 Nov 2025 · 10 likes Coming back to post #15, because the follow-up matters more than the original answer. Storage after first use: most pens can be stored at room temperature after first…
Titles that describe the question, not the situation Replied, post #148 · Start Here › How to Ask · 13 Nov 2025 · 28 likes Worth separating two things that post #144 runs together. Units. Everything needs units. This is why we ask every single time. I have seen the same arithmetic done…
Reference intervals: how they are constructed and why one in twenty flags Replied, post #8 · Clinical › Bloodwork · 4 Nov 2025 · 0 likes post #7 answers the question as asked. The question underneath it is different. Biological variation: the person-to-person variation in a biomarker for a healthy person…
SURMOUNT-4 and what withdrawal data does and does not tell an individual — one year on Replied, post #54 · Compounds › Tirzepatide · 21 Oct 2025 · 8 likes post #53 answers the question as asked. The question underneath it is different. Nausea profile: some people report tirzepatide as less nausea-prone than semaglutide,…
Pen mechanics when the cartridge is nearly empty — does this still hold? Replied, post #8 · Devices › Pens & autoinjectors · 21 Oct 2025 · 10 likes On post #4 — agreed on the reasoning, with one qualification. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you…
[2026 update] Does dual agonism explain the effect size, or is it dose? Replied, post #51 · Compounds › Tirzepatide · 21 Oct 2025 · 0 likes Storage and stability: published data on licensed tirzepatide formulations exists and is worth reading directly rather than through summarised claims. Reconstituted…
Sleep tracking data and its considerable limitations Replied, post #38 · Wellbeing › Sleep · 20 Oct 2025 · 24 likes I read post #36 twice before replying, because I had assumed the opposite. Obstructive sleep apnoea: pre-existing OSA can worsen with weight before it improves…
Second pass at: What "verified" means on our vendor pages, stated narrowly Replied, post #21 · Sourcing › Vendor reports · 3 Oct 2025 · 2 likes Coming back to post #19, because the follow-up matters more than the original answer. Two things before anyone answers the substance. First, the context in the first…
Citing a preprint in a maintained document: our rule and its reasoning — does this still… Replied, post #62 · Evidence › Preprints · 30 Sep 2025 · 1 like 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,…
Reading an interaction checker output critically Replied, post #12 · Practice › Interactions · 27 Sep 2025 · 3 likes Anticoagulants: no direct interaction with the compounds in this class. Weight loss and body composition changes might affect the clearance or effect of warfarin if you…
Payment method and the leverage it gives you, ranked Replied, post #7 · Sourcing › Payments · 13 Sep 2025 · 9 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…
Journal club: indirect comparison between two programmes, defended and attacked — one… Replied, post #35 · Evidence › Journal club · 8 Sep 2025 · 18 likes On post #31 — agreed on the reasoning, with one qualification. SURMOUNT-1 (N Engl J Med 2022): Tirzepatide obesity trial. The largest mean weight reduction for a…
A checklist for reading a certificate in under two minutes — does this still hold? Replied, post #35 · Analytics › COA interpretation · 20 Aug 2025 · 21 likes On post #31 — agreed on the reasoning, with one qualification. Counter-ion form is crucial: peptides are isolated as salts, most often trifluoroacetate from…
[2026 update] What we do not know about retatrutide, listed explicitly Replied, post #54 · Compounds › Retatrutide · 19 Aug 2025 · 0 likes For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.
A ten-fold dose error caught before injection — one year on Replied, post #122 · Devices › Syringes & needles · 4 Aug 2025 · 2 likes post #121 is right about the mechanism and I think understates the practical bit. Dead volume: residual liquid in the hub and needle after withdrawal. Typical residual…
What the GIP component of tirzepatide is thought to contribute, and how confident we can… Replied, post #14 · Compounds › Tirzepatide · 13 Jul 2025 · 5 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 report I filed that turned out to be wrong, and the correction Replied, post #133 · Sourcing › Vendor reports · 2 Jul 2025 · 0 likes I read post #131 twice before replying, because I had assumed the opposite. Structured report format: compound, lot, independent testing service, method as reported,…
Obstructive sleep apnoea and a hard endpoint in this class Replied, post #126 · Clinical › Comorbidities · 27 Jun 2025 · 2 likes post #125 answers the question as asked. The question underneath it is different. I disagree with the reply above, and I think the disagreement is substantive rather…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — the long version Replied, post #142 · Practice › Reconstitution · 22 Jun 2025 · 7 likes Over-dilution: if your target dose is 0.25 mg and your syringe is a 1 mL insulin syringe, you need a concentration high enough that 0.25 mg fits on the scale. A 0.25…
Revisiting: Why a compound being unapproved is not the same as being illegal to possess Replied, post #28 · Sourcing › Regulatory · 18 Jun 2025 · 17 likes I read post #26 twice before replying, because I had assumed the opposite. Import restrictions vary by compound and by jurisdiction: what is a controlled substance in…
Coming back to: When "no data" is the complete and final answer Replied, post #8 · Compounds › Other compounds · 8 Jun 2025 · 18 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 Replied, post #9 · Regional › European Union · 6 Jun 2025 · 9 likes On post #5 — agreed on the reasoning, with one qualification. Spain: AEMPS is the regulator. Public reimbursement for weight management has been limited with regional…
Half-life, steady state, and accumulation worked through Replied, post #18 · Pharmacology › Pharmacokinetics · 24 May 2025 · 0 likes I read post #16 twice before replying, because I had assumed the opposite. Albumin binding: semaglutide binds albumin through a fatty side chain, which sequesters the…
Reading a trial's population section before its results — does this still hold? Replied, post #75 · Evidence › Trials · 6 May 2025 · 18 likes Generalisability: the enrolled population was selected in ways that matter. Entry criteria, run-in periods, and the simple fact that people who agree to a multi-year…
Second pass at: Pharmacy supply in the UK and the questions you will be asked Replied, post #34 · Regional › UK & Ireland · 2 May 2025 · 0 likes Worth separating two things that post #30 runs together. Regional variation in NHS: access varies dramatically by region depending on local commissioning decisions and…
Journal club: SURMOUNT-4 and continuation versus withdrawal — a second dataset Replied, post #19 · Evidence › Journal club · 20 Apr 2025 · 4 likes FLOW (N Engl J Med 2024): Semaglutide renal outcomes in type 2 diabetes and chronic kidney disease. Stopped early for efficacy. Component-by-component analysis is…
Review cadence: how often is a page actually re-checked? Replied, post #19 · Documentation › Doc review · 14 Apr 2025 · 0 likes Worth separating two things that post #15 runs together. Citation checking: if a maintained page cites a paper, the citation should match what the paper actually says.…
Telehealth prescribing models in the US Replied, post #81 · Regional › North America · 7 Apr 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…
UK access routes, dated and sourced — a second dataset Replied, post #55 · Regional › UK & Ireland · 25 Mar 2025 · 9 likes I read post #53 twice before replying, because I had assumed the opposite. Regional variation in NHS: access varies dramatically by region depending on local…
Documenting a supplier's response to a discrepancy — does this still hold? Replied, post #15 · Sourcing › Vendor reports · 22 Mar 2025 · 21 likes post #14 is right about the mechanism and I think understates the practical bit. Testing service selection: Janoshik gives purity with chromatogram. Medutest gives…
Criticising the method without criticising the authors Replied, post #46 · Evidence › Study critique · 11 Mar 2025 · 0 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…
Consistent declarations and why they matter more than clever ones Replied, post #107 · Sourcing › Logistics · 1 Mar 2025 · 16 likes post #106 answers the question as asked. The question underneath it is different. Customs holds: if a parcel is held at customs and you can contact customs directly,…
A supplier that answers analytical questions with restated claims Replied, post #26 · Sourcing › Red flags · 18 Feb 2025 · 3 likes Patterns that reliably precede a problem: underdosing (less active material than stated, documented by independent testing), mislabelling (wrong compound, wrong…
[2026 update] Journal club: SURPASS-2 and the semaglutide 1 mg comparator Replied, post #129 · Evidence › Journal club · 16 Feb 2025 · 0 likes This follows post #126 rather than contradicting it. SOUL (N Engl J Med 2025): Oral semaglutide cardiovascular outcomes. Extends the cardiovascular evidence to the oral…
Canadian access and provincial variation Replied, post #12 · Regional › North America · 22 Jan 2025 · 13 likes Picking up post #9: that is the part I would want checked first. Telehealth prescribing: widespread in the US and varying in quality. Models without a clinician…
[2026 update] Step therapy requirements and how to satisfy them Replied, post #114 · Access › Insurance & coverage · 10 Jan 2025 · 31 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…
Fibre intake when total intake falls, and the constipation link Replied, post #10 · Nutrition & Training › Protein & intake · 25 Dec 2024 · 20 likes Timing of protein: spreading protein intake across the day, with some at each meal, is more practical than trying to hit the whole target at one sitting on suppressed…
Coming back to: When to suspect the method rather than the sample Replied, post #105 · Analytics › Method validation · 20 Dec 2024 · 31 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 #69 · Wellbeing › Mental health · 19 Dec 2024 · 2 likes Mood and anxiety: mood changes and anxiety are reported by some people. Baseline mental health status matters for risk. Someone with a history of depression should plan…
What the published dose-response for semaglutide actually looks like above 2.4 mg — a… Started this topic · Compounds › Semaglutide · 14 Dec 2024 · 8 likes Asking directly, because I could not find a straight answer: What the published dose-response for semaglutide actually looks like above 2.4 mg — a second dataset…
Injection-site reactions: describing them precisely enough to be useful Replied, post #31 · Practice › Side effects · 28 Nov 2024 · 12 likes Nausea: the most common side effect and the most dose- and titration-dependent one. It is usually most prominent in the first 24 to 48 hours after injection and…
Tracking semaglutide's approved indications across jurisdictions, dated — does this… Replied, post #29 · Compounds › Semaglutide · 17 Nov 2024 · 0 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…
EMA product information as a primary source — does this still hold? Replied, post #69 · Regional › European Union · 16 Nov 2024 · 23 likes Coming back to post #67, 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…
Hypertension improvement and when medication needs revisiting — a second dataset Replied, post #67 · Clinical › Comorbidities · 20 Oct 2024 · 2 likes Comorbidity control: if a comorbidity (high blood pressure, high lipids) is not adequately controlled, the decision about adding compounds in this class depends on the…
Revisiting: Holding a dose indefinitely: is there a documented downside? Replied, post #2 · Practice › Dosing & titration · 19 Oct 2024 · 8 likes Titrating on tolerability rather than on the calendar: some people escalate when they tolerate a dose well, others escalate on the prescribed schedule regardless. The…
Progressive overload when the scale is falling — one year on Replied, post #138 · Nutrition & Training › Resistance training · 8 Oct 2024 · 0 likes Post-weight-loss training: once weight loss is complete and energy deficit ends, training can shift to building again. The transition from preservation mode to building…
Food noise reducing and the disorientation that can follow Replied, post #12 · Wellbeing › Mental health · 25 Sep 2024 · 31 likes When to involve a professional: if mood changes are persistent, deepen over weeks, or interfere with function, involving a mental health professional is appropriate.…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #60 · Clinical › Prescriber conversations · 19 Sep 2024 · 2 likes Prescription logistics: confirm whether it will be filled locally, requires mail order, or will be prescribed off-label and needs a compounding pharmacy. Different…
Reporting a discrepancy without making an allegation Replied, post #41 · Sourcing › Vendor reports · 24 Aug 2024 · 2 likes This follows post #38 rather than contradicting it. Testing service selection: Janoshik gives purity with chromatogram. Medutest gives combined purity and identity.…
Taste changes and food aversion, reported and discussed Replied, post #7 · marked as the solution · Practice › Side effects · 3 Aug 2024 · 11 likes This follows post #4 rather than contradicting it. Injection site reaction: local erythema, nodules, or induration at injection sites is reported by some people. Site…
Circumference measurements as a poor man's composition estimate Replied, post #5 · Outcomes › Body composition · 17 Jul 2024 · 1 like Changes during titration: measuring body composition during active titration is less useful than measuring after dose is stable. Titration causes fluid shifts that…
Journal club: FLOW and the renal composite, component by component Replied, post #30 · Evidence › Journal club · 11 Jul 2024 · 19 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…