f.lindholm

TL2 Moderator · Curitiba

Contributes reviews on supplier material. Based in Curitiba.

Joined 26 January 2025 · last posted 2d

75 posts, newest first. Showing up to 150.

Dizziness on standing: the ordinary explanation first — one year on Replied, post #17 · Nutrition & Training › Hydration & electrolytes · 26 Jul 2026 · 1 like 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.
Athletes in weight-category sports: a different risk calculus Replied, post #41 · Clinical › Special populations · 25 Jul 2026 · 5 likes On post #37 — agreed on the reasoning, with one qualification. Two things before anyone answers the substance. First, the context in the first post is clear and…
Journal club: indirect comparison between two programmes, defended and attacked Replied, post #125 · Evidence › Journal club · 21 Jul 2026 · 13 likes TRIUMPH (ongoing): Retatrutide phase 3. No results yet. Nothing should be attributed to it because it has not finished. When it does, this discussion will return to it.
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #97 · Analytics › Method validation · 20 Jul 2026 · 6 likes I read post #95 twice before replying, because I had assumed the opposite. Having read the exchange above, I think I was wrong earlier in this topic and I want to say…
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #87 · Sourcing › Independent verification · 13 Jul 2026 · 0 likes How to submit a sample: contact the service directly. They will provide instructions on vial type, quantity, labelling, shipping. Following their instructions exactly…
Aggregate verification data across the directory, with caveats Replied, post #37 · Sourcing › Independent verification · 9 Jul 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…
Comparing prices across jurisdictions without misleading yourself Replied, post #57 · Access › Pricing · 9 Jun 2026 · 18 likes post #56 answers the question as asked. The question underneath it is different. List prices versus negotiated prices: the price a pharmaceutical company publishes and…
Run-in periods and the population they select Replied, post #133 · Evidence › Trials · 9 Jun 2026 · 0 likes Dropout is information: high dropout rates can indicate tolerability problems or lower efficacy than the summary suggests. Where the analysis handled dropouts matters.…
A critique that turned out to be unfair, retracted by its author Replied, post #9 · Evidence › Study critique · 8 Jun 2026 · 7 likes Criticise the method, not the author: a paper with a weak design is not a bad paper by someone with bad intentions. It is a paper that answers a limited question.…
What I would want from a home test that does not exist yet — what changed since Replied, post #45 · Analytics › Home & field testing · 6 Jun 2026 · 6 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.
Spreadsheets: an appreciation — what changed since Replied, post #61 · Lounge › Off topic · 4 Jun 2026 · 0 likes Not a rules-free zone: the guidelines still apply. No phones, no Telegram, no endorsements of other communities. Just a relaxed bar for how directly the topic needs to…
Coming back to: How much context is too much context in a first post? Replied, post #4 · Start Here › How to Ask · 28 May 2026 · 3 likes Five questions in one post gets you one answer: the easiest one, usually not the one you needed most. Post them separately or pick the one that depends on the others…
Coming back to: Why a preprint's supplementary material is often the best part Replied, post #61 · Evidence › Preprints · 24 May 2026 · 4 likes Unrefereed work is not worthless. A great deal of it survives review substantially unchanged. It is also the case that the version appearing in a journal frequently has…
Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #18 · Analytics › Mass spectrometry · 24 May 2026 · 27 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…
Endotoxin and why it is a separate question from purity — what changed since Replied, post #26 · Analytics › Impurities & related substances · 24 May 2026 · 0 likes Worth separating two things that post #22 runs together. Two things before anyone answers the substance. First, the context in the first post is clear and specific.…
Electrolyte supplements: which ones do anything Replied, post #10 · Nutrition & Training › Hydration & electrolytes · 16 May 2026 · 3 likes Sodium: losing weight involves losing some sodium. Electrolyte drinks or salty foods help maintain sodium balance. Very low sodium intake on these compounds raises…
Second pass at: Metformin co-administration and additive GI effects Replied, post #105 · Practice › Interactions · 15 May 2026 · 0 likes Metformin: commonly co-administered and relevant to gastrointestinal tolerability. Gastrointestinal side effects can overlap and additive. Taking them separately or…
An 18-month record including the parts that went badly Replied, post #8 · Outcomes › Progress reports · 2 May 2026 · 29 likes post #7 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 than…
Measurement error in home scales, with a worked standard deviation — the long version Replied, post #91 · Research Methods › Statistics · 29 Apr 2026 · 20 likes Absence of evidence and evidence of absence: if a study is small and finds no effect, that is absence of evidence, not evidence of absence. A larger study might find an…
Micro-titration: a disputed topic, argued properly Replied, post #59 · Practice › Dosing & titration · 12 Apr 2026 · 0 likes 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…
[2026 update] Composite endpoints and the component doing the work Replied, post #52 · Evidence › Trials · 1 Apr 2026 · 15 likes Risk of bias: structured appraisal of internal validity. Key things to assess: randomisation method (was it truly random or could someone predict the next assignment),…
[2026 update] Area percent versus weight percent: the confusion that causes most arguments Replied, post #22 · Analytics › HPLC & UHPLC · 25 Mar 2026 · 0 likes On integration: where the baseline is drawn matters more than most people realise. On a clean chromatogram with well-resolved peaks the choice is inconsequential. On a…
Type 2 diabetes and the largest part of the evidence base Replied, post #42 · Clinical › Comorbidities · 24 Mar 2026 · 0 likes On post #38 — agreed on the reasoning, with one qualification. Multiple comorbidities: a person with diabetes, kidney disease, and cardiovascular disease is outside the…
Journal club: is percentage weight change the right endpoint? Replied, post #2 · Evidence › Journal club · 18 Mar 2026 · 1 like 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…
Spreadsheets: an appreciation — what changed since Replied, post #2 · Lounge › Off topic · 16 Mar 2026 · 1 like 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] Confounding by indication, explained with a concrete example Replied, post #108 · Evidence › Study critique · 4 Mar 2026 · 0 likes I read post #106 twice before replying, because I had assumed the opposite. Bias towards the null and bias away from the null: different criticisms have different…
Why chargeback is not the safety net people assume Replied, post #3 · marked as the solution · Sourcing › Payments · 2 Mar 2026 · 8 likes Documentation and tax implications: payments you make for compounds might have implications for tax reporting depending on your jurisdiction. Keeping clear records…
Angle of injection and whether 90 degrees is always right Replied, post #108 · Practice › Administration · 28 Feb 2026 · 6 likes Angle of injection: 90 degrees into pinched tissue ensures subcutaneous placement. It is not always necessary and shallower angles can work, but 90 degrees into a small…
[2026 update] Journal club: PIONEER 6 as a safety trial Replied, post #10 · Evidence › Journal club · 25 Feb 2026 · 3 likes post #9 is right about the mechanism and I think understates the practical bit. FLOW (N Engl J Med 2024): Semaglutide renal outcomes in type 2 diabetes and chronic…
How Janoshik, Medutest, PeptideMeter and VendorInvestigate differ — a second dataset Replied, post #26 · Sourcing › Independent verification · 16 Feb 2026 · 0 likes When results are inconclusive: if a testing service reports "insufficient to verify" on a documentation review, that is not a negative finding about the product. It…
Interpreting a result that disagrees with the supplier's certificate Replied, post #118 · Sourcing › Independent verification · 11 Feb 2026 · 15 likes Medutest: combined purity and identity reporting. Appears throughout vendor documentation. Where a submission has been blind we note it because blind results are worth…
Liver enzymes drifting down and what that usually means Replied, post #55 · Clinical › Bloodwork · 10 Feb 2026 · 0 likes Renal function markers: eGFR is estimated, not measured. It depends on creatinine, age, and weight. A small change in creatinine might not mean a real change in kidney…
[2026 update] Confounding by indication, explained with a concrete example Replied, post #28 · Evidence › Study critique · 5 Feb 2026 · 14 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…
Coming back to: Private prescribing in the UK: what is actually involved Replied, post #53 · Regional › UK & Ireland · 10 Jan 2026 · 2 likes Occupational health screening: some UK occupations require medical checks. Disclosure of weight-loss medication might be relevant to employment screening; understand…
What I would record differently if I started again — the long version Replied, post #21 · Outcomes › Progress reports · 25 Dec 2025 · 7 likes Exercise volume changes: increasing exercise intensity or duration can mask weight loss (muscle gain) on the scale. Noting exercise changes when reporting weight helps…
Second pass at: Programming during a large energy deficit Replied, post #62 · Nutrition & Training › Resistance training · 1 Nov 2025 · 14 likes On post #58 — agreed on the reasoning, with one qualification. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what…
Payment mechanics and the recovery options that do not exist Replied, post #34 · Sourcing › Payments · 20 Oct 2025 · 0 likes Fraud and scams: if a supplier demands payment upfront with no recourse if delivery fails, you are taking a risk. Reputation and history of other buyers matter.
Sleep tracking data and its considerable limitations Replied, post #23 · Wellbeing › Sleep · 18 Oct 2025 · 31 likes Worth separating two things that post #19 runs together. Sleep quality versus quantity: some people report changes to sleep duration; others report changes to sleep…
Cagrilintide's dosing interval and the pharmacokinetics behind it Replied, post #23 · Compounds › Cagrilintide & amylin analogues · 1 Oct 2025 · 29 likes On post #19 — agreed on the reasoning, with one qualification. The dosing interval: cagrilintide's half-life is roughly 7 to 8 days, suitable for weekly dosing. The…
Second pass at: The mass-error checker and its intended scope Replied, post #27 · Data & Tools › Calculators · 29 Sep 2025 · 17 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…
Pinch or no pinch, and how needle length changes the answer Replied, post #28 · Practice › Administration · 21 Aug 2025 · 2 likes This follows post #25 rather than contradicting it. A site rotation scheme that actually works: abdomen, outer thigh, back of arm, outer hip. Rotate through them in…
Coming back to: Sample size calculations, read backwards from the published number Replied, post #73 · Evidence › Trials · 13 Aug 2025 · 11 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…
Follow-up: History of disordered eating and why it changes the conversation Replied, post #59 · Clinical › Special populations · 13 Aug 2025 · 10 likes Pancreatitis history: the compounds can rarely trigger pancreatitis. A history of pancreatitis makes monitoring for recurrence more important during titration.
Request: a diff view for wiki revisions — the long version Replied, post #22 · Meta › Feature requests · 23 Jul 2025 · 3 likes Coming back to post #20, because the follow-up matters more than the original answer. Feature scope: some requests are for the site itself (search, filtering,…
A field-by-field walk through a certificate of analysis Replied, post #48 · Analytics › COA interpretation · 15 Jul 2025 · 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…
Second pass at: Triple agonism: additive, synergistic, or neither? Replied, post #75 · Compounds › Retatrutide · 6 Jul 2025 · 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…
Hepatic steatosis: what the MASH trial evidence supports Replied, post #75 · Clinical › Comorbidities · 26 Jun 2025 · 6 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…
Coming back to: Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #27 · Compounds › Semaglutide · 14 Jun 2025 · 6 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…
Half-life, steady state, and accumulation worked through Replied, post #104 · Pharmacology › Pharmacokinetics · 12 Jun 2025 · 22 likes Renal clearance: these compounds are cleared partly via the kidney. In severe renal impairment, clearance is slowed and accumulation risk is higher. Dose adjustments…
Coming back to: Getting a referral rather than a refusal Replied, post #36 · Clinical › Prescriber conversations · 5 Jun 2025 · 1 like What to bring: copies of relevant lab results, pharmacy records (to confirm doses actually taken), and records of any adverse effects you have experienced with other…
[2026 update] Citation sweep results: how many references did not say what was claimed Replied, post #32 · Meta › Wiki maintenance · 28 May 2025 · 13 likes Coming back to post #30, because the follow-up matters more than the original answer. Scope creep: if a page is attempting too much, suggesting it split into multiple…
Anxiety in the first weeks: drug, situation, or both Replied, post #77 · Wellbeing › Mental health · 19 Apr 2025 · 3 likes Substance use: if someone has a history of substance use, appetite suppression and weight loss can shift thinking about body and substance use. This is a risk factor…
Why cagrilintide alone is discussed so much less than in combination Replied, post #29 · Compounds › Cagrilintide & amylin analogues · 25 Mar 2025 · 2 likes Reading the phase 2 paper: it establishes tolerability and efficacy in a selected population on a defined dose escalation. It does not establish the lowest effective…
What the published dose-response for semaglutide actually looks like above 2.4 mg — a… Replied, post #107 · Compounds › Semaglutide · 18 Mar 2025 · 0 likes Worth separating two things that post #103 runs together. On alcohol: the labelling does not contraindicate it, but it raises gastric irritation risk and semaglutide…
Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #24 · Evidence › Journal club · 4 Mar 2025 · 15 likes SURMOUNT-OSA (N Engl J Med 2024): Tirzepatide in obstructive sleep apnoea, using an objective physiological endpoint. Notable because soft endpoints are avoided. Two…
Reading a chromatogram someone posted without axes Replied, post #8 · Analytics › HPLC & UHPLC · 4 Mar 2025 · 2 likes post #7 answers the question as asked. The question underneath it is different. System suitability testing: injections run before and during the sample run to establish…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #6 · Sourcing › Regulatory · 27 Feb 2025 · 2 likes Approval versus licensing: a compound can be approved for a specific indication in one country and not approved at all in another. Tracking jurisdictional approval is…
Journal club: SUSTAIN 6 and its retinopathy signal — does this still hold? Replied, post #41 · Evidence › Journal club · 13 Feb 2025 · 7 likes On post #37 — agreed on the reasoning, with one qualification. SURPASS-2 (N Engl J Med 2021): Direct comparison of tirzepatide with semaglutide 1.0 mg. The 1.0 mg dose…
Canadian access and provincial variation Replied, post #23 · Regional › North America · 26 Jan 2025 · 22 likes Canada: Health Canada licenses compounds. Prescribing is provincial. Compounds are prescription-only. Coverage varies between public and private insurance.
Revisiting: Bug report: the reconstitution calculator and a rounding edge case Replied, post #59 · Data & Tools › Calculators · 20 Jan 2025 · 31 likes This follows post #56 rather than contradicting it. Titration planning: a calculator that shows you the escalation schedule for different starting and ending doses can…
Oral semaglutide bioavailability and its variability between people — a second dataset Replied, post #120 · Compounds › Oral incretins · 28 Dec 2024 · 1 like Why administration conditions matter for oral semaglutide and not for injectables: the oral formulation depends on a transient pH effect in the stomach. Anything that…
[2026 update] New subcategory: rationale and scope Replied, post #99 · Meta › Announcements · 27 Dec 2024 · 0 likes Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread still makes sense to read. The error was mine and it was the…
Oral semaglutide bioavailability and its variability between people — a second dataset Replied, post #47 · Compounds › Oral incretins · 26 Dec 2024 · 0 likes I read post #45 twice before replying, because I had assumed the opposite. PIONEER programme is phase 3 for oral semaglutide. The trials cover multiple indications and…
Semaglutide half-life: where the 165 to 184 hour figure comes from — what changed since Replied, post #65 · Compounds › Semaglutide · 18 Dec 2024 · 7 likes Is there a ceiling dose beyond which the effect plateaus? The trials did not study that because they stopped at 2.4 mg. Some people report trying higher doses, but…
Second pass at: Gauge and length selection for subcutaneous injection Replied, post #5 · Devices › Syringes & needles · 28 Nov 2024 · 4 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…
Taste changes and food aversion, reported and discussed Replied, post #44 · Practice › Side effects · 23 Nov 2024 · 33 likes Fatigue: commonly reported, frequently multifactorial. It is worth asking whether other factors have changed (sleep, training volume, diet adequacy, hydration) before…
Revisiting: How to bring a laboratory report to an appointment usefully Replied, post #143 · Clinical › Bloodwork · 25 Oct 2024 · 28 likes post #142 is right about the mechanism and I think understates the practical bit. A single value outside interval: usually uninformative on a single draw. What makes a…
Reporting a discrepancy without making an allegation Replied, post #89 · Sourcing › Vendor reports · 23 Sep 2024 · 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.
Food noise reducing and the disorientation that can follow Replied, post #10 · Wellbeing › Mental health · 21 Sep 2024 · 0 likes Two things before anyone answers the substance. First, the context in the first post is clear and specific. Second, the question is framed so that an answer can…
Coming back to: The nausea timeline across the first four weeks, with a tabulated log Replied, post #12 · Practice › Side effects · 5 Sep 2024 · 0 likes Delayed gastric emptying: the mechanism behind much of the gastrointestinal side-effect profile. At extreme magnitudes, severe gastroparesis is a rare but serious…
Second pass at: Retatrutide dose escalation in the published trials Replied, post #93 · Compounds › Retatrutide · 22 Jul 2024 · 0 likes post #92 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…
Oral contraceptives and delayed emptying: what the data shows Replied, post #67 · Practice › Interactions · 18 Jul 2024 · 0 likes Thyroid medications: semaglutide is associated with a slowing of gastric emptying, which might affect thyroid medication absorption if they are taken very close…
The topic list is dense — is that deliberate? Replied, post #4 · Meta › Site feedback · 13 Jul 2024 · 3 likes Display issues: broken layouts, images not loading, text overlapping — report with the browser and device you were using. Display bugs are platform-specific.
Cold packs, phase-change material, and what survives ten days Replied, post #84 · Sourcing › Logistics · 8 Jul 2024 · 6 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.…
Assessing a warm arrival: the decision process — one year on Replied, post #44 · Sourcing › Logistics · 30 May 2024 · 0 likes post #43 answers the question as asked. The question underneath it is different. At what point is a parcel genuinely a problem: if it was despatched weeks ago and there…