s.lindqvist

TL2 Moderator · Zadar

Contributes reviews on supplier material. Based in Zadar.

Joined 17 March 2025 · last posted 4h

82 posts, newest first. Showing up to 150.

How the vendor documentation pages are maintained, and by whom Replied, post #3 · Sourcing › Vendor reports · 28 Jul 2026 · 0 likes I read the opening post twice before replying, because I had assumed the opposite. Disputed records: when a result disagreed and was not explained, the record says…
What I would want from a home test that does not exist yet — what changed since Replied, post #104 · Analytics › Home & field testing · 21 Jul 2026 · 0 likes Precision of home tests: most consumer-accessible devices are not precise to the level people want ("is this 99% pure or 97% pure"). They give a yes/no or a rough…
Lean mass preservation: what the evidence supports — does this still hold? Replied, post #115 · Outcomes › Body composition · 15 Jul 2026 · 6 likes Visceral fat: DXA does not distinguish visceral (organ-associated) fat from subcutaneous fat. That distinction might matter but requires different imaging to measure.
Follow-up: How compounding permissions changed when supply normalised Replied, post #3 · Sourcing › Regulatory · 9 Jul 2026 · 21 likes I read the opening post twice before replying, because I had assumed the opposite. Preclinical versus clinical: compounds with strong preclinical data can fail in…
A site rotation scheme that is easy enough to actually follow Replied, post #108 · Practice › Administration · 7 Jul 2026 · 5 likes post #107 answers the question as asked. The question underneath it is different. Injection discomfort: comes from needle gauge (finer = less discomfort), volume…
Why the timeline is on the right and not the left — what changed since Replied, post #69 · Meta › Site feedback · 7 Jul 2026 · 3 likes Navigation problems: if you cannot find something you expected to exist, or the path to it is unclear, report it. Site architecture affects usability.
[2026 update] Interpreting a result that disagrees with the supplier's certificate Replied, post #60 · Sourcing › Independent verification · 3 Jul 2026 · 10 likes post #59 is right about the mechanism and I think understates the practical bit. Thank you for the correction. I have edited my earlier post with a note rather than…
Pancreatitis history and the risk calculus Replied, post #22 · Safety › Contraindications · 24 Jun 2026 · 11 likes Severe hepatic impairment: less is known than for kidney disease. Extreme caution or contraindication depending on the specific degree of impairment.
Primary endpoint hierarchies and why order matters — one year on Replied, post #24 · Evidence › Trials · 24 Jun 2026 · 0 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…
Named, unnamed and unspecified impurities as regulatory categories — the long version Replied, post #17 · Analytics › Impurities & related substances · 22 Jun 2026 · 21 likes post #16 is right about the mechanism and I think understates the practical bit. Off-target structures: if the sequence synthesis goes wrong, a completely different…
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #84 · Sourcing › Vendor reports · 14 Jun 2026 · 0 likes I read post #82 twice before replying, because I had assumed the opposite. Two things before anyone answers the substance. First, the context in the first post is clear…
What to include when your question involves a chromatogram — one year on Replied, post #37 · Start Here › How to Ask · 14 Jun 2026 · 0 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…
Carryover and the ghost peak from last week's standard — what changed since Replied, post #26 · Analytics › HPLC & UHPLC · 12 Jun 2026 · 6 likes post #25 answers the question as asked. The question underneath it is different. Area percent is not mass percent. It is a proportion of absorbance, weighted by each…
MS/MS sequence confirmation: what it costs and when it is worth it Replied, post #2 · Analytics › Mass spectrometry · 6 Jun 2026 · 4 likes Picking up the opening post: that is the part I would want checked first. Thank you for the correction. I have edited my earlier post with a note rather than silently,…
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #73 · Data & Tools › Datasets · 31 May 2026 · 0 likes Combining data from different sources: datasets from this site are not directly comparable to published trials because the populations are different. They are worth…
What TRIUMPH is designed to answer, and why we should not pre-empt it — does this still… Replied, post #27 · Compounds › Retatrutide · 26 May 2026 · 1 like Triple agonism: is the effect additive, synergistic, or neither? A phase 2 comparison of tirzepatide (dual) to retatrutide (triple) would answer that question. The…
Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #30 · Analytics › HPLC & UHPLC · 21 May 2026 · 24 likes Picking up post #27: that is the part I would want checked first. Gradient slope is the single biggest driver of apparent purity differences. A shallower gradient over…
Coming back to: Specificity, linearity, accuracy, precision, range, robustness — with… Replied, post #24 · Analytics › Method validation · 17 May 2026 · 4 likes I read post #22 twice before replying, because I had assumed the opposite. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write…
What I would want from a home test that does not exist yet — what changed since Replied, post #14 · Analytics › Home & field testing · 8 May 2026 · 23 likes What you can use home tests for: confirmation that a solution contains peptide (as opposed to being saline alone), rough screening for very different compounds…
The 2.5 mg starting dose is not a therapeutic dose — why that matters Replied, post #99 · Compounds › Tirzepatide · 26 Apr 2026 · 11 likes SURMOUNT-1 reported weight reduction of a magnitude that was the largest for a pharmacological intervention at that time of publication. It also reported a clear dose…
Interim analyses and stopping rules Replied, post #20 · Evidence › Trials · 20 Apr 2026 · 8 likes Confounding in observational data: a third variable can explain an apparent association. In a randomised trial, randomisation balances unknown confounders. In…
A supplier who responds to a discrepancy with silence — what changed since Replied, post #24 · Sourcing › Red flags · 31 Mar 2026 · 2 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…
Five questions in one post gets you one answer — how to split them Replied, post #43 · Start Here › How to Ask · 30 Mar 2026 · 15 likes Asking a follow-up: new topic or reply in the old one? If the answer depends on the previous post, reply. If it is a question that makes sense without the previous…
[2026 update] Thyroid function tests during substantial weight change Replied, post #25 · Clinical › Bloodwork · 28 Mar 2026 · 0 likes Fasting state: some lab tests require fasting; others do not. Lipids on a fasting draw differ from lipids on a fed draw. Always note whether the test was fasting when…
Rotating between abdomen, thigh and upper arm: absorption differences — one year on Replied, post #38 · Practice › Administration · 26 Mar 2026 · 23 likes A genuinely late dose: the labelling generally says that if the next dose is more than a couple of days away, take it as soon as you notice. If the next dose is close,…
Pharmacy supply in the UK and the questions you will be asked Replied, post #90 · Regional › UK & Ireland · 25 Mar 2026 · 7 likes MHRA is the regulator. Licensed incretin analogues are prescription-only medicines. NHS and private prescribing routes exist with materially different access criteria…
The most useful thing you learned here that was not the answer you came for Replied, post #28 · Lounge › Off topic · 19 Mar 2026 · 9 likes This follows post #25 rather than contradicting it. I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The…
An ABAB design with a data table and honest limitations — a second dataset Replied, post #77 · Research Methods › N-of-1 designs · 18 Mar 2026 · 29 likes Designing a personal experiment that could actually change your mind: that is the standard for an n-of-1 design. An experiment designed so that any result confirms what…
Introducing myself: pharmacist, sceptic, reluctant participant — one year on Replied, post #70 · Lounge › Introductions · 15 Mar 2026 · 5 likes Coming back to post #68, because the follow-up matters more than the original answer. Community culture: introductions give you a sense of who is here. Reading a few…
Citing a preprint in a maintained document: our rule and its reasoning Replied, post #2 · Evidence › Preprints · 11 Mar 2026 · 0 likes I read the opening post twice before replying, because I had assumed the opposite. Two things before anyone answers the substance. First, the context in the first post…
Injection discomfort: needle gauge, volume, temperature, technique Replied, post #28 · Practice › Administration · 19 Feb 2026 · 23 likes post #27 answers the question as asked. The question underneath it is different. Angle of injection: 90 degrees into pinched tissue ensures subcutaneous placement. It…
[2026 update] Area percent versus weight percent: the confusion that causes most arguments Replied, post #6 · Analytics › HPLC & UHPLC · 6 Feb 2026 · 0 likes Coming back to post #4, because the follow-up matters more than the original answer. Detection wavelength: 214 nm detects the peptide bond and is relatively insensitive…
"Greater than or equal to 99%" as a specification rather than a result Replied, post #115 · Analytics › COA interpretation · 21 Jan 2026 · 8 likes Amino acid analysis gives content: it hydrolyses the peptide and quantifies the residues. It measures the peptide content independent of chromatographic purity. Very…
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #60 · Pharmacology › Pharmacokinetics · 15 Jan 2026 · 0 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…
Journal club: semaglutide in MASH, and surrogate endpoints Replied, post #4 · Evidence › Journal club · 8 Jan 2026 · 0 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.
Promotion criteria, and the one that stops most nominations — the long version Replied, post #122 · Documentation › Doc review · 30 Dec 2025 · 10 likes Interdependencies: if updating one page requires updating related pages, posting that connection here helps the maintainers see the scope of work.
Vomiting: when it is expected and when it is a reason to stop Replied, post #26 · Practice › Side effects · 27 Dec 2025 · 3 likes Gallbladder complications: rapid weight loss increases the risk of gallstone formation. The mechanism is not specific to this drug class. The risk is greatest in the…
Specification in the result column: why that is a meaningful error Replied, post #83 · Analytics › COA interpretation · 4 Dec 2025 · 24 likes What fields matter on a certificate: lot number matching the vial, test date, the analytical method stated specifically, the measured result as a number, and the…
Heterogeneity as information rather than as a nuisance Replied, post #15 · Evidence › Meta-analyses · 3 Dec 2025 · 0 likes Why forest plots are more informative than pooled numbers: they show the variation across studies, which tells you whether the effect is consistent or heterogeneous. A…
Documentation that appears only after payment Replied, post #93 · Sourcing › Red flags · 1 Dec 2025 · 0 likes Unresponsiveness: a supplier that does not reply to reasonable requests for documentation or clarification is showing you something about how they operate.
Reading SURMOUNT-1 without the press release — one year on Replied, post #23 · Compounds › Tirzepatide · 19 Nov 2025 · 6 likes Mass and charge states: tirzepatide is about 4813.5 Da and on an electrospray instrument you would expect to see charge states mostly in the 2+ to 4+ range, the same as…
A calculator that gives a right answer to the wrong question — does this still hold? Replied, post #27 · Data & Tools › Calculators · 18 Nov 2025 · 0 likes Reconstitution calculator: enter vial mass, final volume target, and the calculator tells you concentration and syringe mark for a given dose. Useful for…
Revisiting: Aggregates and why a purity assay may miss them entirely Replied, post #18 · Analytics › Impurities & related substances · 17 Nov 2025 · 24 likes Dimer and higher-order multimers: two or more peptide molecules bonded together. They appear at double the mass and higher. They may or may not separate from the…
Second pass at: The topic list is dense — is that deliberate? Replied, post #3 · Meta › Site feedback · 16 Nov 2025 · 0 likes I read the opening post twice before replying, because I had assumed the opposite. Accessibility: screen readers, keyboard navigation, contrast, font size — if…
[2026 update] What steady state means for the decision to escalate Replied, post #53 · Practice › Dosing & titration · 10 Nov 2025 · 3 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…
Revisiting: Gallbladder disease risk with rapid weight loss Replied, post #2 · Clinical › Comorbidities · 22 Oct 2025 · 22 likes the opening post answers the question as asked. The question underneath it is different. Obstructive sleep apnoea: SURMOUNT-OSA used an objective endpoint, the…
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #101 · Data & Tools › Calculators · 1 Sep 2025 · 29 likes Units: all calculators explicitly require units to be stated. This prevents the decimal-point errors that come from forgetting units. Always verify units in and out.
What this community means by "a source", in practical terms Replied, post #93 · Start Here › Welcome · 31 Aug 2025 · 5 likes Coming back to post #91, because the follow-up matters more than the original answer. Your introduction is well framed. You have given enough context that people can…
[2026 update] Are there stupid questions here? A staff answer, at length Started this topic · Start Here › Welcome · 28 Aug 2025 · 43 likes Are there stupid questions here? A staff answer, at length — that is the question, and I have not found it answered plainly anywhere I have looked. Question in the…
Second pass at: A history of disordered eating: proceeding carefully Replied, post #117 · Wellbeing › Mental health · 23 Aug 2025 · 27 likes This follows post #114 rather than contradicting it. Identity and self-image: for some people, weight and body size are central to identity. Large change to body size…
Coming back to: What published stability data actually covers, and what it does not Replied, post #111 · Practice › Storage & stability · 12 Aug 2025 · 30 likes Worth separating two things that post #107 runs together. Dating prepared solutions: write the date reconstitution on the vial in permanent marker. If you later need to…
Pooling trials with different estimands — what changed since Replied, post #9 · Evidence › Meta-analyses · 2 Aug 2025 · 10 likes I read post #7 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 so…
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #66 · Data & Tools › Calculators · 29 Jul 2025 · 2 likes Precision and significant figures: the calculators do not round to match your input precision. If you input values to one decimal place, the output might have more. Use…
The CagriSema phase 2 paper and what a fixed combination buys — the long version Replied, post #99 · Compounds › Cagrilintide & amylin analogues · 15 Jun 2025 · 13 likes Historical amylin analogues: pramlintide was the only long-acting amylin analogue licensed for some time and its poor adherence was a known limitation. A weekly…
What SELECT changed about how semaglutide is discussed, and what it did not Replied, post #130 · Compounds › Semaglutide · 23 May 2025 · 0 likes post #129 answers the question as asked. The question underneath it is different. On alcohol: the labelling does not contraindicate it, but it raises gastric irritation…
Reading a supplier's product description as a marketing document Replied, post #20 · Compounds › Other compounds · 8 May 2025 · 9 likes post #19 is right about the mechanism and I think understates the practical bit. AOD-9604 is a fragment of human growth hormone and has been discussed as a potential…
Journal club: SURMOUNT-4 and continuation versus withdrawal — a second dataset Replied, post #27 · Evidence › Journal club · 5 May 2025 · 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…
Counter-ion content and its effect on measured mass Replied, post #25 · Analytics › Mass spectrometry · 26 Apr 2025 · 0 likes Quantitation by MS: most quantitation is done by LC-UV detection at 214 nm, not by MS, because extinction coefficients are better known. MS can quantify if an internal…
Reconstituting a multi-strength kit without mixing yourself up Replied, post #51 · Practice › Reconstitution · 31 Mar 2025 · 1 like post #50 is right about the mechanism and I think understates the practical bit. A 10 mg vial reconstituted three different ways: 1 mL diluent gives 10 mg/mL, 2 mL…
The C-cell question: rodent findings and their human context Replied, post #4 · Compounds › Semaglutide · 30 Mar 2025 · 26 likes Coming back to post #2, because the follow-up matters more than the original answer. Semaglutide versus liraglutide in STEP 8: semaglutide produced greater weight…
Journal club: STEP 4 and what a withdrawal design can prove Replied, post #11 · Evidence › Journal club · 17 Mar 2025 · 0 likes On post #7 — agreed on the reasoning, with one qualification. SURMOUNT-1 (N Engl J Med 2022): Tirzepatide obesity trial. The largest mean weight reduction for a…
Biased agonism: a real phenomenon, an over-used explanation Replied, post #2 · Pharmacology › Receptor biology · 23 Feb 2025 · 0 likes Bias and desensitisation: receptors can be biased (preferentially activating some downstream pathways over others) and can desensitise over time (responding less to the…
Consistent declarations and why they matter more than clever ones Replied, post #54 · Sourcing › Logistics · 19 Feb 2025 · 0 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…
Follow-up: Tesamorelin has an approved indication — what that changes about the evidence Replied, post #12 · Compounds › Secretagogues & GH axis · 17 Feb 2025 · 0 likes Tesamorelin has an approved indication in HIV-associated lipodystrophy. That is the only compound in this class with a registration-quality evidence base from a proper…
Scheduled maintenance and what will be unavailable Replied, post #15 · Meta › Announcements · 14 Jan 2025 · 29 likes post #14 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…
Follow-up: Individual participant data versus aggregate data Replied, post #41 · Evidence › Meta-analyses · 9 Jan 2025 · 0 likes Worth separating two things that post #37 runs together. Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather…
A promotion I argued against, and why I lost Replied, post #43 · Documentation › Doc review · 28 Dec 2024 · 14 likes This follows post #40 rather than contradicting it. Review date disputes: if a maintained page's review date is approaching and it has not been updated, post a note so…
Body image changing more slowly than the body Replied, post #57 · Wellbeing › Mental health · 17 Dec 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…
[2026 update] Step therapy requirements and how to satisfy them Replied, post #56 · Access › Insurance & coverage · 5 Dec 2024 · 5 likes Appeals process: unemotional prose, the criterion quoted verbatim, evidence mapped to it point by point, dates, and nothing else. Describing how the decision affected…
Coming back to: When to suspect the method rather than the sample Replied, post #4 · Analytics › Method validation · 27 Nov 2024 · 10 likes This follows post #2 rather than contradicting it. Accuracy: the method measures what you intend to measure. For purity methods, this is tested by spike-and-recover…
When to suspect the method rather than the sample Replied, post #42 · Analytics › Method validation · 26 Nov 2024 · 5 likes Stability-indicating method: one that can separate a compound from its degradation products. Critical for assay methods that claim to measure actual degradation (as…
Revisiting: Bug report: the reconstitution calculator and a rounding edge case Replied, post #4 · Data & Tools › Calculators · 25 Nov 2024 · 21 likes Precision and significant figures: the calculators do not round to match your input precision. If you input values to one decimal place, the output might have more. Use…
Micronutrient status when intake falls substantially — a second dataset Replied, post #5 · Clinical › Bloodwork · 22 Nov 2024 · 0 likes Worth separating two things that the opening post runs together. Fasting state: some lab tests require fasting; others do not. Lipids on a fasting draw differ from…
EMA product information as a primary source — does this still hold? Replied, post #57 · Regional › European Union · 16 Nov 2024 · 14 likes Reimbursement varies substantially by member state. Some (Germany, France, Netherlands) restrict weight-management coverage. Others are more permissive. That variation…
Signs of dehydration worth acting on Replied, post #39 · Safety › Adverse events · 3 Nov 2024 · 32 likes Allergic reactions: true allergy (anaphylaxis, severe rash) is rare with these peptide compounds but possible. Distinguishing true allergy from GI intolerance matters.
Why a preprint's supplementary material is often the best part Replied, post #24 · Evidence › Preprints · 15 Sep 2024 · 17 likes Peer review as a filter: published papers have survived a review process that rejects many submissions. Preprints have not. Neither guarantees correctness, but…
Splitting a vial for two laboratories: how to do it without ruining both — what changed… Replied, post #57 · Sourcing › Independent verification · 14 Sep 2024 · 0 likes Repeat testing: if you want to verify the same lot a second time, testing with a different service strengthens the conclusion. Testing with the same service verifies…
Identical chromatograms across two different lots Replied, post #19 · Sourcing › Red flags · 28 Aug 2024 · 0 likes Unresponsiveness: a supplier that does not reply to reasonable requests for documentation or clarification is showing you something about how they operate.
Chronic kidney disease and the FLOW result Replied, post #28 · Clinical › Comorbidities · 19 Aug 2024 · 3 likes Cardiovascular disease: several compounds have cardiovascular outcome trials. SELECT was in people without diabetes; SUSTAIN 6 was in high-risk diabetes. Absolute…
Journal club: SURPASS-2 and the semaglutide 1 mg comparator Replied, post #8 · Evidence › Journal club · 1 Aug 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…
Cold packs, phase-change material, and what survives ten days Replied, post #37 · Sourcing › Logistics · 23 Jun 2024 · 0 likes Customs outcomes are not predictable at the level of an individual parcel. What is predictable is that consistent, accurate declarations correlate with fewer…
The mass-error checker and its intended scope Replied, post #53 · Data & Tools › Calculators · 16 Jun 2024 · 14 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.