e.kuipers

TL2 Moderator · Mombasa

Contributes reviews on supplier material. Based in Mombasa.

Joined 25 September 2025 · last posted 3d

74 posts, newest first. Showing up to 150.

Deletion sequences: expected mass shifts by residue — the long version Replied, post #23 · Analytics › Impurities & related substances · 25 Jul 2026 · 9 likes Picking up post #20: that is the part I would want checked first. Related substances: compounds chemically related to the target peptide but not the target peptide…
Coming back to: Preparing for an appointment: one page, three questions Replied, post #47 · Clinical › Prescriber conversations · 25 Jul 2026 · 7 likes Preparing for an appointment: bring recent bloodwork, a list of current medications with doses and timing, and any questions written out. Written questions get better…
Request: a per-category review queue Replied, post #128 · Meta › Feature requests · 24 Jul 2026 · 0 likes On post #124 — agreed on the reasoning, with one qualification. Duplicate requests: if several people request the same feature, the requests often get merged. Check…
Which categories are strict and which are relaxed, honestly Replied, post #27 · Start Here › Welcome · 18 Jul 2026 · 12 likes I read post #25 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…
Semaglutide and gastric emptying — the mechanism behind most of the side-effect profile Replied, post #103 · Compounds › Semaglutide · 13 Jul 2026 · 16 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…
Follow-up: How compounding permissions changed when supply normalised Replied, post #7 · Sourcing › Regulatory · 10 Jul 2026 · 14 likes Regulatory positions change: a compound's status today might differ from its status a year from now. Citing a regulatory position is worth doing only with a date…
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #90 · Evidence › Journal club · 8 Jul 2026 · 9 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.
Trust level 3 requirements: a clarification — does this still hold? Replied, post #78 · Meta › Announcements · 7 Jul 2026 · 17 likes Notifications: watching this subcategory means you receive notifications when announcements are posted. Useful if you want to stay current.
How shortages have affected compounding permissions Replied, post #7 · Access › Shortages · 30 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…
Stepping down deliberately, and how to do it without losing progress — what changed since Replied, post #23 · Practice › Dosing & titration · 28 Jun 2026 · 3 likes Steady state means the plasma concentration is stable from dose to dose. That happens around 4 to 5 half-lives. Before that, the concentration is rising with each dose.…
Revisiting: The report format the maintainers ask for, and why each field is there Replied, post #88 · Sourcing › Vendor reports · 21 Jun 2026 · 0 likes Date the report: when the analysis was done matters. Material can degrade in storage. A report from two years ago is still useful but is not evidence about the current…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #45 · Evidence › Journal club · 19 Jun 2026 · 20 likes SOUL (N Engl J Med 2025): Oral semaglutide cardiovascular outcomes. Extends the cardiovascular evidence to the oral formulation. Note that oral bioavailability is lower…
Carryover and the ghost peak from last week's standard — what changed since Replied, post #30 · Analytics › HPLC & UHPLC · 13 Jun 2026 · 20 likes Detection wavelength: 214 nm detects the peptide bond and is relatively insensitive to composition. 280 nm detects aromatic residues and is strongly…
Second pass at: Sleep apnoea improving and the equipment implications Replied, post #57 · Wellbeing › Sleep · 12 Jun 2026 · 4 likes Appetite suppression and nighttime eating: if nighttime eating was a pattern, appetite suppression changes that pattern. Sleep can worsen if nighttime waking is…
How to ask a question when you cannot say why you are asking it Replied, post #4 · Start Here › How to Ask · 1 Jun 2026 · 0 likes Worth separating two things that post #3 runs together. Lab result questions: state the result, the reference interval, and what else is on the same panel. A single…
Bariatric surgery history: altered anatomy, altered expectations Replied, post #20 · Clinical › Special populations · 22 May 2026 · 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…
Follow-up: Sleep quality changes during weight loss Replied, post #27 · Wellbeing › Sleep · 21 May 2026 · 0 likes Sleep hygiene: basics (cool dark room, consistent sleep time, no screens before bed) matter more during energy deficit because stress and sleep need are higher.
What TRIUMPH is designed to answer, and why we should not pre-empt it — does this still… Replied, post #23 · Compounds › Retatrutide · 13 May 2026 · 3 likes This follows post #20 rather than contradicting it. Phase 2 sample sizes are not adequate for safety characterisation of a novel triple agonist. Phase 3 is where that…
Follow-up: Reconciling a label claim with a content assay Replied, post #14 · Analytics › COA interpretation · 10 Apr 2026 · 18 likes Coming back to post #12, 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…
Five questions in one post gets you one answer — how to split them Replied, post #47 · Start Here › How to Ask · 4 Apr 2026 · 10 likes What you have already read matters. Saying "I read the maintained page on this and I still have a gap" tells people they do not need to point you at the same resource…
Amylin receptor signalling and satiety — what changed since Replied, post #51 · Pharmacology › Receptor biology · 26 Mar 2026 · 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…
Run-in periods and the population they select — the long version Replied, post #3 · Evidence › Trials · 25 Mar 2026 · 3 likes I read the opening post twice before replying, because I had assumed the opposite. Practical note that does not fit anywhere else. Whatever you conclude from this…
A 10 mg vial reconstituted three different ways, compared Replied, post #10 · Practice › Reconstitution · 21 Mar 2026 · 8 likes The decimal-point error: computing 5 mg / 2 mL as 0.25 mg/mL instead of 2.5 mg/mL is the most common arithmetic error in this subcategory. The habit that catches it:…
Rotating between abdomen, thigh and upper arm: absorption differences — one year on Replied, post #34 · Practice › Administration · 18 Mar 2026 · 16 likes Leak-back after withdrawal: a small amount of liquid on the skin after withdrawal is ordinary. Whether you lost a "meaningful" dose depends on concentration and your…
Introducing myself: pharmacist, sceptic, reluctant participant — one year on Replied, post #66 · Lounge › Introductions · 14 Mar 2026 · 23 likes Following up: if you introduce yourself and someone asks a follow-up question, you can reply here or in a direct message depending on what feels right.
Revisiting: Absolute versus relative contraindications Replied, post #41 · Safety › Contraindications · 11 Mar 2026 · 7 likes Concurrent insulin or sulfonylureas: not an absolute contraindication but requires dose adjustment and close monitoring for hypoglycemia. The combination is used with…
Measurement error in home scales, with a worked standard deviation — the long version Replied, post #30 · Research Methods › Statistics · 11 Feb 2026 · 1 like Relative risk and odds ratios: both compare the rate in one group to the rate in another. Relative risk is easier to understand. Odds ratios are standard in many…
Half-life, steady state, and accumulation worked through — a second dataset Replied, post #56 · Pharmacology › Pharmacokinetics · 10 Jan 2026 · 30 likes I read post #54 twice before replying, because I had assumed the opposite. SNAC (the oral bioavailability enhancer): sodium N-(8-[2-hydroxybenzoyl]amino) caprylate…
Promotion criteria, and the one that stops most nominations — the long version Replied, post #126 · Documentation › Doc review · 5 Jan 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.
Documentation that appears only after payment Replied, post #97 · Sourcing › Red flags · 5 Dec 2025 · 27 likes This follows post #94 rather than contradicting it. I disagree with the reply above, and I think the disagreement is substantive rather than terminological. The…
Reading SURMOUNT-1 without the press release — one year on Replied, post #27 · Compounds › Tirzepatide · 5 Dec 2025 · 9 likes The 2.5 mg starting dose is not a therapeutic dose in the sense that weight loss is minimal at that dose. It is a tolerance-testing dose. Confusing the purpose of a…
Heterogeneity as information rather than as a nuisance Replied, post #11 · Evidence › Meta-analyses · 29 Nov 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: The topic list is dense — is that deliberate? Replied, post #7 · Meta › Site feedback · 24 Nov 2025 · 27 likes Coming back to post #5, because the follow-up matters more than the original answer. Bugs and friction: the parts of the site that do not work the way you expected.…
Revisiting: Aggregates and why a purity assay may miss them entirely Replied, post #14 · Analytics › Impurities & related substances · 16 Nov 2025 · 17 likes post #13 is right about the mechanism and I think understates the practical bit. Residual solvents: traces of solvents used in purification. These are usually tested by…
[2026 update] What steady state means for the decision to escalate Replied, post #57 · Practice › Dosing & titration · 11 Nov 2025 · 6 likes The arithmetic of an intermediate dose: if the label says 1.0 mg and 2.0 mg, a dose strictly between them is off-label by definition. Some people compute it anyway. The…
Warfarin and altered intake: the monitoring argument — the long version Replied, post #46 · Practice › Interactions · 8 Nov 2025 · 6 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…
A calculator that gives a right answer to the wrong question — does this still hold? Replied, post #23 · Data & Tools › Calculators · 2 Nov 2025 · 0 likes Coming back to post #21, 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…
Documentation that materially improves an appeal's chances Replied, post #30 · Access › Insurance & coverage · 16 Oct 2025 · 0 likes Formulary status: the list of covered medications and the tier (how much you pay) they are on. Checking the current formulary before going to a clinic appointment saves…
The most useful thing you learned here that was not the answer you came for — a second… Replied, post #90 · Lounge › Off topic · 11 Oct 2025 · 0 likes On post #86 — agreed on the reasoning, with one qualification. Science communication: if you come across an interesting science paper or article about peptides or…
An orphaned page with no inbound links — the long version Replied, post #4 · Meta › Wiki maintenance · 8 Oct 2025 · 8 likes I read the opening post twice before replying, because I had assumed the opposite. Redundancy: if two maintained pages cover largely the same ground, consolidation…
Sleep quality changes during weight loss — what changed since Replied, post #17 · Wellbeing › Sleep · 5 Oct 2025 · 11 likes Picking up post #14: 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, so the…
The nausea timeline across the first four weeks, with a tabulated log Replied, post #69 · Practice › Side effects · 17 Sep 2025 · 11 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…
The nausea timeline across the first four weeks, with a tabulated log — what changed since Replied, post #8 · Practice › Side effects · 15 Sep 2025 · 0 likes Worth separating two things that post #4 runs together. Lean mass loss: the rate of lean tissue loss depends on protein intake, resistance training volume, and total…
Coming back to: What published stability data actually covers, and what it does not Replied, post #115 · Practice › Storage & stability · 17 Aug 2025 · 22 likes On post #111 — agreed on the reasoning, with one qualification. Published stability data applies specifically to the formulation studied, under the specific conditions…
A request that was declined, and the reasoning — a second dataset Replied, post #75 · Documentation › Wiki requests · 13 Aug 2025 · 12 likes This follows post #72 rather than contradicting it. Format suggestions: if you think a maintained page could be clearer in its presentation (different section…
Gauge and length selection for subcutaneous injection Replied, post #19 · Devices › Syringes & needles · 10 Aug 2025 · 1 like 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…
Aggregated purity results across four services, with caveats Replied, post #2 · Data & Tools › Datasets · 26 Jun 2025 · 0 likes How to contribute: if you have longitudinal data you want to add, the format is simple: date, measurement, context. Contact the maintainer of the specific dataset.
Revisiting: Why a compound being unapproved is not the same as being illegal to possess Replied, post #34 · Sourcing › Regulatory · 25 Jun 2025 · 0 likes post #33 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…
Sodium, potassium and magnesium when intake drops Replied, post #28 · Nutrition & Training › Hydration & electrolytes · 24 Jun 2025 · 0 likes Potassium: similar to sodium; losing weight involves some potassium loss. Bananas, sweet potatoes, and other potassium-rich foods help. Severe depletion is rare but…
Second pass at: Trial registration and comparing the protocol with the paper Replied, post #27 · Evidence › Trials · 11 Jun 2025 · 2 likes post #26 answers the question as asked. The question underneath it is different. Surrogate endpoints: an endpoint that is not the outcome that matters but is measured…
[2026 update] An appeal that failed, and what I would do differently Replied, post #48 · Access › Insurance & coverage · 10 Jun 2025 · 15 likes I read post #46 twice before replying, because I had assumed the opposite. Appeals process: unemotional prose, the criterion quoted verbatim, evidence mapped to it…
What SELECT changed about how semaglutide is discussed, and what it did not Replied, post #126 · Compounds › Semaglutide · 20 May 2025 · 0 likes The opalescent appearance in semaglutide solutions is occasionally noted and the mechanism is unclear. It does not appear to correlate with product failure in practice.…
Journal club: SURMOUNT-4 and continuation versus withdrawal — a second dataset Replied, post #23 · Evidence › Journal club · 28 Apr 2025 · 4 likes post #22 answers the question as asked. The question underneath it is different. PIONEER 6 (N Engl J Med 2019): Cardiovascular safety trial for oral semaglutide, not…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #128 · Evidence › Journal club · 23 Apr 2025 · 15 likes This follows post #125 rather than contradicting it. SELECT (N Engl J Med 2023): Semaglutide cardiovascular outcomes without diabetes. The first outcome trial in people…
Counter-ion content and its effect on measured mass Replied, post #21 · Analytics › Mass spectrometry · 20 Apr 2025 · 0 likes post #20 is right about the mechanism and I think understates the practical bit. Charge states observed: for semaglutide (4113.6 Da) the doubly charged ion appears at…
The C-cell question: rodent findings and their human context Replied, post #8 · Compounds › Semaglutide · 16 Apr 2025 · 19 likes The mass figure differs between sources because of how the different entities report it. The monoisotopic mass of the bare peptide is one number; the mass including the…
Follow-up: Open-label extensions: what survives and what does not Replied, post #26 · Evidence › Trials · 5 Apr 2025 · 6 likes Picking up post #23: that is the part I would want checked first. Dropout is information: high dropout rates can indicate tolerability problems or lower efficacy than…
Maintainer handover: how it works Replied, post #83 · Meta › Wiki maintenance · 19 Mar 2025 · 2 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…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #45 · Sourcing › Regulatory · 1 Mar 2025 · 8 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…
Follow-up: Tesamorelin has an approved indication — what that changes about the evidence Replied, post #16 · Compounds › Secretagogues & GH axis · 26 Feb 2025 · 30 likes This follows post #13 rather than contradicting it. Pulsatile secretion matters because growth hormone is secreted in pulses, not continuously. A single post-dose…
Biased agonism: a real phenomenon, an over-used explanation — what changed since Replied, post #45 · Pharmacology › Receptor biology · 7 Feb 2025 · 20 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 #5 · Sourcing › Logistics · 7 Feb 2025 · 23 likes Customs outcomes are not predictable at the level of an individual parcel. What is predictable is that consistent, accurate declarations correlate with fewer…
Distinguishing a deletion sequence by mass alone Replied, post #29 · Analytics › Mass spectrometry · 29 Jan 2025 · 10 likes Common adducts: sodium adds ≈22, potassium adds ≈38 compared to hydrogen. A [M+Na]+ peak is common and its mass is predictable from the base mass.
Recovery when intake is low: what to cut first Replied, post #53 · Nutrition & Training › Resistance training · 13 Jan 2025 · 15 likes Picking up post #50: that is the part I would want checked first. Cardio and resistance: the interaction between energy-intense cardiovascular training and resistance…
Scheduled maintenance and what will be unavailable Replied, post #11 · Meta › Announcements · 9 Jan 2025 · 22 likes post #10 is right about the mechanism and I think understates the practical bit. Notifications: watching this subcategory means you receive notifications when…
Oxidation pathways for methionine and tryptophan Replied, post #62 · Analytics › Impurities & related substances · 31 Dec 2024 · 5 likes I read post #60 twice before replying, because I had assumed the opposite. Disulfide formation: if a peptide contains cysteine, it can form disulfide bonds with itself…
Body image changing more slowly than the body Replied, post #53 · Wellbeing › Mental health · 17 Dec 2024 · 1 like Identity and self-image: for some people, weight and body size are central to identity. Large change to body size can affect identity. This is not pathological; it is…
[2026 update] Step therapy requirements and how to satisfy them Replied, post #52 · Access › Insurance & coverage · 3 Dec 2024 · 2 likes Worth separating two things that post #48 runs together. Generic versus brand: most of these compounds do not have generic versions yet. Once they do, formulary…
Follow-up: Escalating every six weeks instead of four: what I observed over eight months Replied, post #4 · Practice › Dosing & titration · 25 Nov 2024 · 20 likes the opening post is right about the mechanism and I think understates the practical bit. Steady state means the plasma concentration is stable from dose to dose. That…
Revisiting: Melanocortin agonists: mechanism and the documented adverse profile Replied, post #60 · Compounds › Other compounds · 19 Oct 2024 · 0 likes This follows post #57 rather than contradicting it. AOD-9604 is a fragment of human growth hormone and has been discussed as a potential weight-loss agent based on…
Why a preprint's supplementary material is often the best part Replied, post #28 · Evidence › Preprints · 18 Sep 2024 · 11 likes Picking up post #25: that is the part I would want checked first. I disagree with the reply above, and I think the disagreement is substantive rather than…
Transit times by route, from a logged dataset — the long version Replied, post #10 · Sourcing › Logistics · 5 Sep 2024 · 6 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…
Correlation in a self-tracked dataset: what it can support Replied, post #4 · Research Methods › Statistics · 19 Aug 2024 · 10 likes Number needed to treat: how many people need to be treated to prevent one bad outcome or achieve one good outcome. More intuitive than relative risk reduction.
Identical chromatograms across two different lots Replied, post #15 · Sourcing › Red flags · 15 Aug 2024 · 29 likes Rapid supplier turnover: a supplier that changes corporate structure, domain name, or contact repeatedly in short time windows raises suspicion about stability and…