h.delgado

TL2 · Kaunas

Contributes reviews on supplier material. Based in Kaunas.

Joined 29 September 2024 · last posted 2d

72 posts, newest first. Showing up to 150.

[2026 update] Currency conversion and the cost you did not see Replied, post #27 · Sourcing › Payments · 26 Jul 2026 · 2 likes Adding a small correction to the Currency conversion summary above rather than a disagreement with it. The substance holds; one of the figures is out by a factor that…
How to ask a question when you cannot say why you are asking it Replied, post #39 · Start Here › How to Ask · 13 Jul 2026 · 2 likes It is fine to say you cannot explain why you are asking. Nobody will press, and the technical part of the question can usually be answered without the context.
A structured critique template this community uses — a second dataset Replied, post #36 · Evidence › Study critique · 12 Jul 2026 · 0 likes Generalisability: do the inclusion/exclusion criteria narrow the population so much that results do not apply to real people asking about it? This is a fair criticism…
Packaging that arrived damaged: documenting it properly Replied, post #39 · Sourcing › Logistics · 9 Jul 2026 · 5 likes Split shipments reduce single-point risk and increase the number of transits. Which trade is right depends on what you are protecting against.
Revisiting: Why the absence of controlled human data on BPC-157 matters more than people… Replied, post #21 · Compounds › Repair & healing peptides · 9 Jul 2026 · 0 likes I read post #17 twice before replying, because I had assumed the opposite. I have three months of notes on absence of controlled human data and the honest summary is…
Alcohol: what is documented and what is folklore Replied, post #94 · Practice › Interactions · 5 Jul 2026 · 10 likes Adding the boring version of alcohol, because the interesting version keeps getting posted and the boring one is usually right. Check the ordinary explanations, in…
Insurance and replacement policies, compared Replied, post #53 · Sourcing › Logistics · 30 Jun 2026 · 1 like What would change my mind on insurance and replacement policies is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I…
Reading a rodent study on a secretagogue without over-extrapolating — the long version Replied, post #12 · Compounds › Secretagogues & GH axis · 27 Jun 2026 · 31 likes Growth hormone secretagogues act on the ghrelin receptor or on the growth hormone releasing hormone receptor rather than supplying growth hormone, which is the…
Pages past their review date, listed — does this still hold? Replied, post #25 · Meta › Wiki maintenance · 25 Jun 2026 · 6 likes Cross-referencing: if two pages should reference each other but do not, suggesting the cross-reference helps the maintainer see the connection. Caveat: everything above…
Coming back to: Time to steady state after a dose increase Replied, post #80 · Pharmacology › Pharmacokinetics · 19 Jun 2026 · 0 likes On post #78 — agreed on the reasoning, with one qualification. Where two sources give different half-lives, check the study design before deciding either is wrong.…
Coming back to: A structured critique template this community uses Replied, post #36 · Evidence › Study critique · 18 Jun 2026 · 17 likes That is the distinction I keep failing to hold on to. Written down now.
Does dual agonism explain the effect size, or is it dose? Replied, post #33 · Compounds › Tirzepatide · 13 Jun 2026 · 0 likes Narrowing post #32, because the general version has more than one answer. The GIP component: GIP receptor agonism is thought to amplify the GLP-1 effect on satiety and…
Two scans six weeks apart on different machines: a cautionary tale Replied, post #27 · Outcomes › Body composition · 26 May 2026 · 0 likes Photographs under fixed lighting and posture are a genuine record and are the hardest of these to standardise.
Transporting a vial for a weekend away — a second dataset Replied, post #60 · Practice › Storage & stability · 22 May 2026 · 1 like Answering the question post #56 raises rather than the one it answers. Light protection is easy and cheap. The original carton exists for a reason and a vial stored in…
Research-use-only status: what it means legally and practically Replied, post #40 · Compounds › Other compounds · 10 May 2026 · 28 likes The confident answers on research-use-only status and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this…
Molecular mass of semaglutide and why the figure differs between sources Replied, post #44 · Compounds › Semaglutide · 26 Apr 2026 · 0 likes Taking post #41 at face value and following it one step further. Semaglutide's structure is a modified backbone with a C18 diacid attached through a spacer. The…
Converting between mg/mL and units per dose, both directions — the long version Replied, post #20 · Practice › Reconstitution · 18 Apr 2026 · 0 likes Arithmetic step by step: a 5 mg vial with 2 mL of diluent gives (5 mg) / (2 mL) = 2.5 mg/mL. On a U-100 syringe at that concentration, 100 units = 1 mL = 2.5 mg, so…
Coming back to: Half-life, steady state, and accumulation worked through Replied, post #10 · Pharmacology › Pharmacokinetics · 9 Apr 2026 · 0 likes Accumulation at steady state: with a week-long half-life, steady-state concentration is reached around 4 to 5 half-lives (about 4 to 5 weeks). Before that,…
Pharmacy supply in the UK and the questions you will be asked Replied, post #103 · Regional › UK & Ireland · 3 Apr 2026 · 20 likes Everything in post #99 holds. The case it does not cover is the one I have. Compounding pharmacies: UK allows compounding under specific conditions when a licensed…
A plateau that disappeared when I changed how I measured Replied, post #23 · Outcomes › Progress reports · 14 Mar 2026 · 0 likes Include what else changed. Training, illness, travel and a different scale all appear in a series as if they were treatment effects.
Coming back to: Why a preprint's supplementary material is often the best part Replied, post #10 · Evidence › Preprints · 13 Mar 2026 · 3 likes Where I part company with post #6, and it is a narrow parting. Author track record is a weak signal and it is a signal. A group that has published carefully for years…
Revisiting: Language barriers in accessing a prescription abroad Replied, post #141 · Access › International · 3 Mar 2026 · 0 likes I read post #137 twice before replying, because I had assumed the opposite. I would be cautious about generalising from the Language barriers in accessing example…
Stability of BPC-157 in solution: what has been measured — one year on Replied, post #15 · Compounds › Repair & healing peptides · 27 Feb 2026 · 4 likes Coming back to post #11, because the follow-up matters more than the original answer. The bit of Stability of BPC-157 that nobody enjoys is that the answer changes…
Analytical identity of BPC-157: a 15-mer with a simple mass — does this still hold? Replied, post #10 · Compounds › Repair & healing peptides · 22 Feb 2026 · 20 likes BPC-157's published evidence is overwhelmingly preclinical and mostly rodent. That is not a dismissal — it is the state of the literature, and any discussion that…
Mass error in ppm: the arithmetic and the caveat Replied, post #103 · Analytics › Mass spectrometry · 15 Feb 2026 · 0 likes Adding the measurement that post #100 says would settle it. Practical note on mass error in ppm: write down what you expect before you look. The number of times I have…
A widely repeated interaction claim that turns out to be unsupported Replied, post #25 · Practice › Interactions · 5 Feb 2026 · 18 likes Trying to state the widely repeated interaction claim position in a way that someone who disagrees would recognise as fair, because I do not think the version in this…
Reconstitution volumes that produce round numbers, tabulated Replied, post #39 · Practice › Reconstitution · 4 Feb 2026 · 0 likes Post #38 answers the question as asked. The question underneath it is different. Osmolarity and reconstitution: the osmolarity of the reconstituted solution affects…
Pregnancy and pregnancy planning: contraindication and washout Replied, post #14 · Clinical › Special populations · 14 Jan 2026 · 3 likes What would change my mind on pregnancy and pregnancy planning is a second dataset collected by someone with no stake in the first. Until then I hold it loosely and I…
Coming back to: A community side-effect dataset, with its response rate and biases Replied, post #13 · Data & Tools › Datasets · 9 Jan 2026 · 0 likes Worth separating two things that post #9 runs together. An honest declaration on community side-effect dataset: I have a prior here and it is strong enough that you…
Follow-up: A supplier that answers analytical questions with restated claims Replied, post #24 · Sourcing › Red flags · 23 Dec 2025 · 7 likes This follows post #23 rather than contradicting it. Anonymity: a supplier that will not disclose legal name, address, or responsible person is not operating in a way…
Can a home kit substitute for a laboratory report? A careful no Replied, post #65 · Analytics › Home & field testing · 28 Nov 2025 · 1 like Picking up post #64: that is the part I would want checked first. The right question for any home test is: what physical quantity does it measure, and what would have…
Robustness: the parameters worth deliberately varying Replied, post #22 · Analytics › Method validation · 26 Nov 2025 · 3 likes Confirming post #21 from a second method, which matters more than confirming it from a second person. My experience of robustness contradicts the reply above. I am…
Sequence verification for an obscure compound: how it is done — what changed since Replied, post #81 · Compounds › Other compounds · 25 Nov 2025 · 6 likes Adding a note of thanks rather than an opinion. I did not know most of that.
Run-in periods and the population they select Replied, post #20 · Evidence › Trials · 10 Nov 2025 · 2 likes Sensible. I would want the same detail before I acted on it either.
New subcategory: rationale and scope Replied, post #130 · Meta › Announcements · 26 Oct 2025 · 1 like Adding the measurement that post #129 says would settle it. The bit of new subcategory that nobody enjoys is that the answer changes depending on what you are trying to…
[2026 update] Does dual agonism explain the effect size, or is it dose? Replied, post #35 · Compounds › Tirzepatide · 3 Oct 2025 · 0 likes Research-use-only tirzepatide is not approved for human use and is not made to pharmaceutical standards. Anyone discussing it here is describing what they did, not…
A parcel that arrived warm: a decision process, not a verdict Replied, post #49 · Practice › Storage & stability · 22 Sep 2025 · 1 like Saving this. It is the version I will quote when the question comes round again.
Documentation that materially improves an appeal's chances Replied, post #6 · Access › Insurance & coverage · 20 Sep 2025 · 5 likes Reimbursement changes: a compound covered one year might not be the next. A formulary decision in January can change by April. Checking again before refilling saves…
Aggregated purity results across four services, with caveats — a second dataset Replied, post #49 · Data & Tools › Datasets · 8 Sep 2025 · 11 likes Posting my Aggregated purity results across four numbers with the method attached so they can be discounted properly. Uncontrolled, unblinded, and collected by someone…
Substitution between formats during a shortage Replied, post #50 · Access › Shortages · 3 Sep 2025 · 0 likes The published shortage register maintained by the national regulator is the authoritative source here, and it is updated far more often than any thread.
Follow-up: Journal club: orforglipron phase 2 and the non-peptide question Replied, post #41 · Evidence › Journal club · 23 Aug 2025 · 1 like The baseline characteristics table is the single most useful page for the questions that get asked here, because it tells you who the result applies to.
Coming back to: The SOUL trial and oral semaglutide cardiovascular outcomes Replied, post #30 · Compounds › Oral incretins · 22 Aug 2025 · 12 likes Post #27 is right about the mechanism and I think understates the practical bit. Orforglipron is a small molecule, not a peptide. That changes almost everything: no…
Temperature loggers worth the money — the long version Replied, post #28 · Devices › Cold chain · 21 Aug 2025 · 11 likes Post #26 and I disagree about the size of the effect, not about the direction. A phase-change pack holds a defined temperature while it changes state and then behaves…
What this community means by "a source", in practical terms Replied, post #73 · Start Here › Welcome · 16 Aug 2025 · 3 likes The Lounge is a real category rather than a dumping ground. The sourcing rule still applies there, which surprises people, but the register is looser and nobody minds a…
Coming back to: Resolution and tailing factor: real acceptance criteria Replied, post #35 · Analytics › HPLC & UHPLC · 13 Aug 2025 · 11 likes A chromatogram image at a resolution where you can see peak shape but not baseline detail is worth having and is not the same as the data. Ask for the integration table…
Coming back to: What published stability data actually covers, and what it does not Replied, post #80 · Practice › Storage & stability · 6 Jul 2025 · 28 likes This is the first time the answer has come with its own limits attached. Appreciated.
A ten-fold dose error caught before injection Replied, post #55 · Devices › Syringes & needles · 26 Jun 2025 · 16 likes Reading rather than answering, but this is the post I would point somebody at.
Reconstituting a multi-strength kit without mixing yourself up Replied, post #91 · Practice › Reconstitution · 26 Jun 2025 · 32 likes Understood. Thank you for being specific about the limits of it.
Coming back to: Getting a referral rather than a refusal Replied, post #41 · Clinical › Prescriber conversations · 7 Jun 2025 · 22 likes Bringing a record of symptoms with dates and severities makes an assessment materially easier and is the single most useful preparation.
Follow-up: Why the titration planner refuses to produce a schedule below a floor Replied, post #12 · Data & Tools › Calculators · 28 May 2025 · 23 likes Worth separating two things that post #10 runs together. A titration planner is a scheduling aid rather than a clinical recommendation, and any tool that presents one…
A well-designed study with a badly written abstract Replied, post #111 · Evidence › Study critique · 27 May 2025 · 7 likes I would keep well-designed study and the decision it usually gets used for separate in this thread. They are related and they are not the same question, and merging…
DXA precision and the least significant change for lean mass — the long version Replied, post #83 · Outcomes › Body composition · 23 May 2025 · 0 likes Narrowing post #82, because the general version has more than one answer. What I would want before treating DXA precision as settled: the method, the sample, and…
Cost per milligram, computed honestly across formats — the long version Replied, post #88 · Access › Pricing · 4 May 2025 · 1 like Confirming post #86 from a second method, which matters more than confirming it from a second person. Cost per week at a maintenance dose is the figure most people…
Hello from a laboratory that does not do peptides Replied, post #4 · Lounge › Introductions · 20 Apr 2025 · 27 likes Introductions are also a reasonable place to say what you are hoping to find, because somebody will usually know whether it exists here already. Speaking for myself and…
Retatrutide dose escalation in the published trials Replied, post #90 · Compounds › Retatrutide · 5 Apr 2025 · 0 likes Post #86 put the caveat in the right place and I want to underline it. Why this subcategory is more cautious than elsewhere: retatrutide is investigational, phase 3 is…
Carryover and the ghost peak from last week's standard Replied, post #5 · Analytics › HPLC & UHPLC · 31 Mar 2025 · 7 likes The version of carryover that circulates here is a simplification of a simplification. It is not wrong, but it has lost the conditions under which it holds, and those…
Second pass at: Gauge and length selection for subcutaneous injection Replied, post #46 · Devices › Syringes & needles · 25 Mar 2025 · 7 likes Reading back through, this was answered upthread and I missed it. My fault.
Follow-up: What other technical communities get right that we do not Replied, post #45 · Lounge › Off topic · 21 Mar 2025 · 14 likes Useful. I have added it to my own notes with the date on it.
Journal club: STEP 4 and what a withdrawal design can prove — one year on Replied, post #42 · Evidence › Journal club · 6 Mar 2025 · 0 likes The documentation on STEP 4 is better than this thread and I say that as someone who has posted in the thread.
Electrolyte supplements: which ones do anything — a second dataset Started this topic · Nutrition & Training › Hydration & electrolytes · 20 Feb 2025 · 49 likes Electrolyte supplements: which ones do anything — a second dataset Writing it up because I had to work it out twice and would rather nobody else did. Posting a small…
[2026 update] Dose numbers across compounds are not on the same scale Replied, post #3 · Practice › Dosing & titration · 1 Feb 2025 · 17 likes Dose equivalence between different incretin analogues is a weak concept. The molecules differ in structure, half-life, receptor selectivity, and in what has been…
Follow-up: Individual participant data versus aggregate data Started this topic · Evidence › Meta-analyses · 7 Jan 2025 · 26 likes Individual participant data versus aggregate data — setting out what I have, and where I think it stops being reliable. A follow-up question about Individual…
Fixed versus detachable needles: the trade-offs Replied, post #83 · Devices › Syringes & needles · 31 Dec 2024 · 31 likes Sharps containers are a legal requirement for disposal in several jurisdictions and a sensible precaution everywhere. A rigid sealed container is the minimum.
When a preprint is the best available evidence and we say so — a second dataset Replied, post #9 · Evidence › Preprints · 27 Dec 2024 · 16 likes Same experience here, different supplier, so it is at least not unique to one of them.
Coming back to: Cost per delivered dose, which is the number that matters Replied, post #5 · Access › Pricing · 19 Dec 2024 · 28 likes The cost of an independent submission is worth stating in these threads, because it is the main reason people do not do it.
Meeting a protein target on a suppressed appetite — does this still hold? Replied, post #52 · Nutrition & Training › Protein & intake · 12 Dec 2024 · 8 likes A target that is not being met is worth adjusting downward to something achievable rather than being missed indefinitely.
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #26 · Compounds › Cagrilintide & amylin analogues · 23 Nov 2024 · 0 likes Confirming post #23 from a second method, which matters more than confirming it from a second person. Amylin analogues affect gastric emptying as well, so the mechanism…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #109 · Analytics › COA interpretation · 7 Nov 2024 · 0 likes Picking up post #108: that is the part I would want checked first. A certificate is a statement by its issuer that a defined test was performed on a defined lot and…
Time to steady state after a dose increase Replied, post #67 · Pharmacology › Pharmacokinetics · 4 Nov 2024 · 21 likes Dose proportionality across the studied range means dose arithmetic behaves the way you would naively expect. It is worth checking whether it holds for a given compound…
Anaesthesia and elective surgery: the aspiration question — does this still hold? Replied, post #2 · Practice › Interactions · 24 Sep 2024 · 6 likes A supplement is a drug for interaction purposes, and the fact that it is sold without a prescription tells you nothing about whether it interacts. The paperwork is…
Second pass at: Retatrutide dose escalation in the published trials Replied, post #72 · Compounds › Retatrutide · 21 Jul 2024 · 9 likes I had written a reply contradicting post #68 and deleted it. Here is what survived. On dose escalation: the published protocols escalated in defined steps over defined…
The most common factual error about semaglutide on the internet Started this topic · Compounds › Semaglutide · 26 May 2024 · 8 likes On the subject in the title: The most common factual error about semaglutide on the internet Working notes rather than a conclusion. Putting the numbers in the first…