h.delgado

TL2 Moderator · 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 Documentation and tax implications: payments you make for compounds might have implications for tax reporting depending on your jurisdiction. Keeping clear records…
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 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…
A structured critique template this community uses — a second dataset Replied, post #36 · Evidence › Study critique · 12 Jul 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…
Packaging that arrived damaged: documenting it properly Replied, post #39 · Sourcing › Logistics · 9 Jul 2026 · 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.
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 On post #17 — agreed on the reasoning, with one qualification. Reading a preclinical wound-healing model: the model shows whether a mechanism is plausible in a specific…
Alcohol: what is documented and what is folklore Replied, post #94 · Practice › Interactions · 5 Jul 2026 · 10 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.
Insurance and replacement policies, compared Replied, post #53 · Sourcing › Logistics · 30 Jun 2026 · 1 like 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…
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 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…
Pages past their review date, listed — does this still hold? Replied, post #25 · Meta › Wiki maintenance · 25 Jun 2026 · 6 likes Authority: if you think a page needs input from someone with specific expertise, suggesting that person helps the maintainer recruit contributors.
Coming back to: Time to steady state after a dose increase Replied, post #80 · Pharmacology › Pharmacokinetics · 19 Jun 2026 · 0 likes Coming back to post #78, because the follow-up matters more than the original answer. Renal clearance: these compounds are cleared partly via the kidney. In severe…
Coming back to: A structured critique template this community uses Replied, post #36 · Evidence › Study critique · 18 Jun 2026 · 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…
Does dual agonism explain the effect size, or is it dose? Replied, post #33 · Compounds › Tirzepatide · 13 Jun 2026 · 0 likes post #32 answers the question as asked. The question underneath it is different. The 2.5 mg starting dose is not a therapeutic dose in the sense that weight loss is…
Two scans six weeks apart on different machines: a cautionary tale Replied, post #27 · Outcomes › Body composition · 26 May 2026 · 0 likes Changes during titration: measuring body composition during active titration is less useful than measuring after dose is stable. Titration causes fluid shifts that…
Transporting a vial for a weekend away — a second dataset Replied, post #60 · Practice › Storage & stability · 22 May 2026 · 1 like Worth separating two things that post #56 runs together. Published stability data applies specifically to the formulation studied, under the specific conditions stated.…
Research-use-only status: what it means legally and practically Replied, post #40 · Compounds › Other compounds · 10 May 2026 · 28 likes Compounds this community declines to help with, and why: there are specifics in the guidelines and they are not arbitrary. They exist because of failure modes that have…
Molecular mass of semaglutide and why the figure differs between sources Replied, post #44 · Compounds › Semaglutide · 26 Apr 2026 · 0 likes Picking up post #41: that is the part I would want checked first. Albumin binding is not a unique structural feature and nothing in the class lacks it, but the…
Converting between mg/mL and units per dose, both directions — the long version Replied, post #20 · Practice › Reconstitution · 18 Apr 2026 · 0 likes Reconstituting a multi-strength kit: if a kit contains 5 mg, 10 mg, 15 mg vials and you are reconstituting all of them, writing the concentration on each vial in…
Coming back to: Half-life, steady state, and accumulation worked through Replied, post #10 · Pharmacology › Pharmacokinetics · 9 Apr 2026 · 0 likes Bioavailability: oral semaglutide has low bioavailability (roughly 1%) due to peptide instability. That is why the oral dose (14 mg) is so much larger than the…
Pharmacy supply in the UK and the questions you will be asked Replied, post #103 · Regional › UK & Ireland · 3 Apr 2026 · 20 likes On post #99 — agreed on the reasoning, with one qualification. Private prescribing is legal and widespread, including through remote consultation. Pharmacies must…
A plateau that disappeared when I changed how I measured Replied, post #23 · Outcomes › Progress reports · 14 Mar 2026 · 0 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…
Coming back to: Why a preprint's supplementary material is often the best part Replied, post #10 · Evidence › Preprints · 13 Mar 2026 · 3 likes Worth separating two things that post #6 runs together. What changes between preprint and publication: authors respond to reviewer comments, re-analyse data, correct…
Revisiting: Language barriers in accessing a prescription abroad Replied, post #141 · Access › International · 3 Mar 2026 · 0 likes Worth separating two things that post #137 runs together. Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather…
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 Worth separating two things that post #11 runs together. BPC-157: the preclinical literature is extensive, mostly from a small number of research groups, and reports…
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 Publication patterns in the BPC-157 literature: a large proportion of the evidence comes from one research group. That is not necessarily wrong — one group can do…
Mass error in ppm: the arithmetic and the caveat Replied, post #103 · Analytics › Mass spectrometry · 15 Feb 2026 · 0 likes This follows post #100 rather than contradicting it. Purity and identity are different questions: LC-MS establishes that the species at a retention time has the…
A widely repeated interaction claim that turns out to be unsupported Replied, post #25 · Practice › Interactions · 5 Feb 2026 · 18 likes Sulfonylureas and meglitinides: these agents stimulate insulin release and carry hypoglycemia risk. Combining them with semaglutide or tirzepatide requires dose…
Reconstitution volumes that produce round numbers, tabulated Replied, post #39 · Practice › Reconstitution · 4 Feb 2026 · 0 likes post #38 is right about the mechanism and I think understates the practical bit. Foaming during reconstitution: bubbles in the solution are usually just air…
Pregnancy and pregnancy planning: contraindication and washout Replied, post #14 · Clinical › Special populations · 14 Jan 2026 · 3 likes Pancreatitis history: the compounds can rarely trigger pancreatitis. A history of pancreatitis makes monitoring for recurrence more important during titration.
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. Two things before anyone answers the substance. First, the context in the first post is clear and specific.…
Follow-up: A supplier that answers analytical questions with restated claims Replied, post #24 · Sourcing › Red flags · 23 Dec 2025 · 7 likes post #23 answers the question as asked. The question underneath it is different. Inconsistency across documents: a certificate stating one purity, a website claiming…
Can a home kit substitute for a laboratory report? A careful no Replied, post #65 · Analytics › Home & field testing · 28 Nov 2025 · 1 like post #64 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…
Robustness: the parameters worth deliberately varying Replied, post #22 · Analytics › Method validation · 26 Nov 2025 · 3 likes post #21 is right about the mechanism and I think understates the practical bit. Why two laboratories may disagree: after validating the same method, they may still…
Sequence verification for an obscure compound: how it is done — what changed since Replied, post #81 · Compounds › Other compounds · 25 Nov 2025 · 6 likes This follows post #78 rather than contradicting it. Compounds this community declines to help with, and why: there are specifics in the guidelines and they are not…
Run-in periods and the population they select Replied, post #20 · Evidence › Trials · 10 Nov 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…
New subcategory: rationale and scope Replied, post #130 · Meta › Announcements · 26 Oct 2025 · 1 like post #129 answers the question as asked. The question underneath it is different. Scheduled maintenance: if the site is going offline for maintenance, advance notice…
[2026 update] Does dual agonism explain the effect size, or is it dose? Replied, post #35 · Compounds › Tirzepatide · 3 Oct 2025 · 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…
A parcel that arrived warm: a decision process, not a verdict Replied, post #49 · Practice › Storage & stability · 22 Sep 2025 · 1 like Dating prepared solutions: write the date reconstitution on the vial in permanent marker. If you later need to know whether it has been sitting for weeks or days, the…
Documentation that materially improves an appeal's chances Replied, post #6 · Access › Insurance & coverage · 20 Sep 2025 · 5 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…
Aggregated purity results across four services, with caveats — a second dataset Replied, post #49 · Data & Tools › Datasets · 8 Sep 2025 · 11 likes Community-collected datasets: some members have compiled datasets from their own experience and shared them. They are self-reported, unblinded, and therefore limited as…
Substitution between formats during a shortage Replied, post #50 · Access › Shortages · 3 Sep 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…
Follow-up: Journal club: orforglipron phase 2 and the non-peptide question Replied, post #41 · Evidence › Journal club · 23 Aug 2025 · 1 like 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…
Coming back to: The SOUL trial and oral semaglutide cardiovascular outcomes Replied, post #30 · Compounds › Oral incretins · 22 Aug 2025 · 12 likes Picking up post #27: that is the part I would want checked first. Dose numbers for oral formulations are not comparable to injectable ones. The 14 mg oral dose is not…
Temperature loggers worth the money — the long version Replied, post #28 · Devices › Cold chain · 21 Aug 2025 · 11 likes I read post #26 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…
What this community means by "a source", in practical terms Replied, post #73 · Start Here › Welcome · 16 Aug 2025 · 3 likes The compound and evidence pages are updated regularly and they are worth reading when you are new. They answer the meta questions like "do we have data on this" and…
Coming back to: Resolution and tailing factor: real acceptance criteria Replied, post #35 · Analytics › HPLC & UHPLC · 13 Aug 2025 · 11 likes Gradient slope is the single biggest driver of apparent purity differences. A shallower gradient over a longer run resolves more impurities and gives a higher purity…
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 Worth separating two things that post #76 runs together. Container choice matters: the material of the vial, the rubber closure, the fill volume all affect how quickly…
A ten-fold dose error caught before injection Replied, post #55 · Devices › Syringes & needles · 26 Jun 2025 · 16 likes Syringe barrel size: common sizes are 0.3 mL, 0.5 mL, and 1.0 mL. Smaller barrels are more legible for small doses. Larger barrels hold larger volumes. Choose based on…
Reconstituting a multi-strength kit without mixing yourself up Replied, post #91 · Practice › Reconstitution · 26 Jun 2025 · 32 likes Foaming during reconstitution: bubbles in the solution are usually just air incorporated during mixing. They usually resolve with gentle warming and time. Persistent…
Coming back to: Getting a referral rather than a refusal Replied, post #41 · Clinical › Prescriber conversations · 7 Jun 2025 · 22 likes Understanding stopping rules: what would prompt stopping the compound? Adverse effect, lack of benefit after a defined time, or other reasons? Knowing in advance is…
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 I read post #10 twice before replying, because I had assumed the opposite. Units: all calculators explicitly require units to be stated. This prevents the decimal-point…
A well-designed study with a badly written abstract Replied, post #111 · Evidence › Study critique · 27 May 2025 · 7 likes Multiple comparisons: if a paper reports many outcomes, the chance of a spurious association by random chance is real. Pre-specification of primary outcomes matters and…
DXA precision and the least significant change for lean mass — the long version Replied, post #83 · Outcomes › Body composition · 23 May 2025 · 0 likes post #82 answers the question as asked. The question underneath it is different. Precision versus accuracy: the precision you need depends on what question you are…
Cost per milligram, computed honestly across formats — the long version Replied, post #88 · Access › Pricing · 4 May 2025 · 1 like post #87 is right about the mechanism and I think understates the practical bit. Pharmacy acquisition cost: a pharmacy pays less than the patient pays, even at…
Hello from a laboratory that does not do peptides Replied, post #4 · Lounge › Introductions · 20 Apr 2025 · 27 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…
Retatrutide dose escalation in the published trials Replied, post #90 · Compounds › Retatrutide · 5 Apr 2025 · 0 likes On post #86 — agreed on the reasoning, with one qualification. Dose escalation in the published trials: the protocols started at lower doses and escalated by defined…
Carryover and the ghost peak from last week's standard Replied, post #5 · Analytics › HPLC & UHPLC · 31 Mar 2025 · 7 likes Method validation is the demonstration that a method can separate the compound from its degradation products and impurities reliably. A method that cannot resolve an…
Second pass at: Gauge and length selection for subcutaneous injection Replied, post #46 · Devices › Syringes & needles · 25 Mar 2025 · 7 likes On post #42 — agreed on the reasoning, with one qualification. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what…
Follow-up: What other technical communities get right that we do not Replied, post #45 · Lounge › Off topic · 21 Mar 2025 · 14 likes Newer drugs and mechanisms: when a new drug launches or a new mechanism is discovered, the Lounge is a place to discuss the news and speculate before hard data exists.
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 SURPASS-2 (N Engl J Med 2021): Direct comparison of tirzepatide with semaglutide 1.0 mg. The 1.0 mg dose is not the highest available, which is the central and…
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. Maintenance rather…
[2026 update] Dose numbers across compounds are not on the same scale Replied, post #3 · Practice › Dosing & titration · 1 Feb 2025 · 17 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.
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. Comparing LEADER ( N Engl J Med , 2016) with…
Fixed versus detachable needles: the trade-offs Replied, post #83 · Devices › Syringes & needles · 31 Dec 2024 · 31 likes Needle length: typical lengths for subcutaneous injection are 4-6 mm (short), 8 mm (standard), or 10-12 mm (longer). Longer needles are needed for deeper tissue or if…
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 Always label it as a preprint in any discussion. A preprint is not a published trial and it is not settled knowledge. Use it for hypothesis generation and for…
Coming back to: Cost per delivered dose, which is the number that matters Replied, post #5 · Access › Pricing · 19 Dec 2024 · 28 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.
Meeting a protein target on a suppressed appetite — does this still hold? Replied, post #52 · Nutrition & Training › Protein & intake · 12 Dec 2024 · 8 likes Protein targets during weight loss: the standard recommendation is 1.6 to 2.2 grams per kilogram of body weight. Individual requirements vary but that range is a…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #26 · Compounds › Cagrilintide & amylin analogues · 23 Nov 2024 · 0 likes Picking up post #23: that is the part I would want checked first. Historical amylin analogues: pramlintide was the only long-acting amylin analogue licensed for some…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #109 · Analytics › COA interpretation · 7 Nov 2024 · 0 likes post #108 answers the question as asked. The question underneath it is different. Purity and content are different measurements: purity tells you what proportion of the…
Time to steady state after a dose increase Replied, post #67 · Pharmacology › Pharmacokinetics · 4 Nov 2024 · 21 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,…
Anaesthesia and elective surgery: the aspiration question — does this still hold? Replied, post #2 · Practice › Interactions · 24 Sep 2024 · 6 likes Thyroid medications: semaglutide is associated with a slowing of gastric emptying, which might affect thyroid medication absorption if they are taken very close…
Second pass at: Retatrutide dose escalation in the published trials Replied, post #72 · Compounds › Retatrutide · 21 Jul 2024 · 9 likes On post #68 — agreed on the reasoning, with one qualification. Two things before anyone answers the substance. First, the context in the first post is clear and…
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. Session topic: STEP 2 ( Lancet ,…