h.krastev

TL2 · Linköping

Contributes reviews on supplier material. Based in Linköping.

Joined 17 July 2025 · last posted 4d

90 posts, newest first. Showing up to 150.

Why the Start Here categories exist, and what they are not for Replied, post #34 · Start Here › Welcome · 24 Jul 2026 · 0 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…
Request: a per-category review queue Replied, post #126 · Meta › Feature requests · 24 Jul 2026 · 13 likes Per-category review queue is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong answers.
Tracking intake honestly when appetite is absent Replied, post #107 · Nutrition & Training › Protein & intake · 21 Jul 2026 · 2 likes Eating anything at all: on substantial appetite suppression, eating enough total calories to maintain lean mass is the priority. Protein comes second to total intake.
Coming back to: Delayed gastric emptying and oral medication absorption: which drugs… Replied, post #43 · Practice › Interactions · 19 Jul 2026 · 0 likes Summarising the Delayed gastric emptying and oral thread so far, since it is long and the answer is buried: the first reply has the method, the fourth has the…
Search filters: what is missing Replied, post #82 · Meta › Site feedback · 18 Jul 2026 · 0 likes If someone has run search filters properly I would rather read that than my own reconstruction of it. Posting mine only because the thread has gone quiet.
Which categories are strict and which are relaxed, honestly Replied, post #14 · Start Here › Welcome · 14 Jul 2026 · 0 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…
Reading order for a first week here, and what to skip until later — what changed since Replied, post #24 · Start Here › Welcome · 9 Jul 2026 · 0 likes That is clearer than the version I had in my head. Thank you.
Trust level 3 requirements: a clarification — does this still hold? Replied, post #76 · Meta › Announcements · 4 Jul 2026 · 0 likes Reading rather than contributing, but this is the most useful thread I have found on it.
Second pass at: Metformin co-administration and additive GI effects Replied, post #139 · Practice › Interactions · 3 Jul 2026 · 0 likes That is the distinction I keep failing to hold on to. Written down now.
Bioimpedance and hydration: why the number moves Replied, post #70 · Outcomes › Body composition · 3 Jul 2026 · 8 likes Nobody has said the unglamorous part of bioimpedance and hydration yet, so: most of the variation is explained by things that are boring to write about and easy to check.
Rotating between abdomen, thigh and upper arm: absorption differences — one year on Replied, post #80 · Practice › Administration · 17 Jun 2026 · 17 likes Leave real distance between consecutive sites rather than moving a centimetre. Repeatedly injecting one area changes the local tissue over time and eventually changes…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #43 · Evidence › Journal club · 16 Jun 2026 · 0 likes Picking up post #42: that is the part I would want checked first. What I would want before treating STEP 1 as settled: the method, the sample, and whether anyone tried…
A plateau that disappeared when I changed how I measured — the long version Replied, post #49 · Outcomes › Progress reports · 12 Jun 2026 · 0 likes Plateau was covered in the wiki last year and the page has a review date on it, which is a better starting point than my memory of a thread.
An appeal that succeeded, with the letter structure — the long version Replied, post #68 · Access › Insurance & coverage · 8 Jun 2026 · 16 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…
Revisiting: The best-written scientific paper you have read Replied, post #19 · Lounge › Off topic · 7 Jun 2026 · 3 likes Right — I had this wrong and I am glad to have read it before it mattered.
Official shortage notices and what they authorise Replied, post #75 · Access › Shortages · 29 May 2026 · 8 likes Post #71 put the caveat in the right place and I want to underline it. Shortage status determines what compounding is permitted in some jurisdictions, which links two…
How to ask a question when you cannot say why you are asking it Replied, post #2 · Start Here › How to Ask · 28 May 2026 · 16 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…
Naming conventions for research peptides and the confusion they cause Replied, post #7 · Compounds › Other compounds · 25 May 2026 · 0 likes Naming conventions for research peptides is a question about a distribution, not about a value, and treating it as a value is what produces the confident wrong answers.
Review: a draft on reconstitution arithmetic, with objections — what changed since Replied, post #10 · Documentation › Doc review · 21 May 2026 · 28 likes I had written a reply contradicting post #6 and deleted it. Here is what survived. Where content is lifted from a topic, attribution should be in the document rather…
How this community labels and discusses unrefereed work — the long version Replied, post #20 · Evidence › Preprints · 14 May 2026 · 18 likes Reading a preprint properly means doing some of the reviewer's job: methods first, then whether the analysis matches the plan, then the conclusion. Small point, but it…
Follow-up: Sleep quality changes during weight loss Replied, post #21 · Wellbeing › Sleep · 13 May 2026 · 14 likes Building on post #20 rather than restating it. A referral for a proper sleep study answers in one night what months of forum discussion cannot.
[2026 update] A vial that will not fully dissolve: what to check and in what order Replied, post #50 · Practice › Reconstitution · 12 May 2026 · 10 likes I read post #46 twice before replying, because I had assumed the opposite. The best check on any reconstitution calculation is to do it twice by two different routes —…
GLP-1 receptor distribution: central and peripheral Replied, post #46 · Pharmacology › Receptor biology · 9 May 2026 · 1 like Where I part company with post #43, and it is a narrow parting. GLP-1 receptor agonism produces its metabolic effects through more than one route: central satiety…
[2026 update] 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #97 · Devices › Syringes & needles · 7 May 2026 · 21 likes I read post #95 twice before replying, because I had assumed the opposite. The version of 0.3 ml versus 0.5 ml that circulates here is a simplification of a…
What to include when your question involves a chromatogram — one year on Started this topic · Start Here › How to Ask · 7 May 2026 · 0 likes Asking directly, because I could not find a straight answer: What to include when your question involves a chromatogram — one year on Question in the title. Context…
[2026 update] 0.3 mL versus 0.5 mL versus 1 mL barrels: resolution matters Replied, post #74 · Devices › Syringes & needles · 30 Apr 2026 · 23 likes Reading the barrel at eye level matters more than any equipment choice. Parallax at a shallow angle is enough to shift a reading by a graduation.
Follow-up: Comparing two chromatograms from different laboratories, properly Replied, post #19 · Analytics › HPLC & UHPLC · 29 Apr 2026 · 3 likes Trifluoroacetic acid at 0.1 per cent is the near-universal ion-pairing additive for this work, and it also raises the baseline at 214 nanometres. That is why the same…
Ultrasound and skinfolds: operator dependence in practice — what changed since Replied, post #30 · Outcomes › Body composition · 31 Mar 2026 · 26 likes Worth separating two things that post #28 runs together. Ultrasound: thickness of subcutaneous fat at specific sites. Less standardised than DXA and operator-dependent.…
[2026 update] Does a peptide degrade silently, with no visual change? Replied, post #39 · Practice › Storage & stability · 27 Mar 2026 · 19 likes Marking my uncertainty on peptide explicitly. I am confident about the direction, much less confident about the size, and not confident at all that it generalises past…
Why "dose equivalence" between different incretin analogues is a weak concept Replied, post #49 · Practice › Dosing & titration · 17 Feb 2026 · 0 likes Worth separating two things that post #48 runs together. Titrating on tolerability rather than on the calendar: some people escalate when they tolerate a dose well,…
Follow-up: Search filters: what is missing Replied, post #26 · Meta › Site feedback · 3 Feb 2026 · 30 likes Practical answer on Search filters, since the theoretical one is upthread: do the simplest check first, write down the result, and only then decide whether the…
Tracking that stops updating and then resumes — the long version Replied, post #67 · Sourcing › Logistics · 17 Jan 2026 · 0 likes Split shipments reduce single-point risk and increase the number of transits. Which trade is right depends on what you are protecting against.
[2026 update] Are there stupid questions here? A staff answer, at length Replied, post #16 · Start Here › Welcome · 13 Jan 2026 · 2 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…
Coverage in the US: a map of the usual obstacles Replied, post #32 · Regional › North America · 5 Jan 2026 · 0 likes Everything in post #28 holds. The case it does not cover is the one I have. Prior authorisation, step therapy, and exclusion of weight-management indications from…
Early satiety becoming a problem rather than a benefit Replied, post #21 · Practice › Side effects · 1 Jan 2026 · 0 likes Reporting rather than recommending, on early satiety. What happened is above. Whether it should have is a different question and not one I am qualified to answer.
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly — the long… Replied, post #31 · Compounds › Tirzepatide · 4 Dec 2025 · 2 likes Answering the question post #29 raises rather than the one it answers. SURPASS-2 compared tirzepatide with semaglutide 1.0 mg, the licensed diabetes dose at that time.…
Coming back to: Over-dilution: when your dose falls below one readable graduation Replied, post #90 · Practice › Reconstitution · 3 Dec 2025 · 10 likes Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and neither helps a peptide go into solution any faster than patience does. That has held…
Promotion criteria, and the one that stops most nominations — the long version Replied, post #92 · Documentation › Doc review · 13 Nov 2025 · 4 likes Second maintainers matter. A single maintainer is a single point of failure and every document here that went stale had one. The interesting part of this is the…
Warfarin and altered intake: the monitoring argument — the long version Replied, post #48 · Practice › Interactions · 11 Nov 2025 · 31 likes Warfarin and altered intake came up in a thread eighteen months ago and was answered well. I cannot find it, which is itself the problem, so here is the reconstruction.
Prescription requirements and telehealth models Replied, post #3 · Sourcing › Regulatory · 5 Nov 2025 · 21 likes Distinguishing three things in the prescription requirements and telehealth models discussion that keep getting used interchangeably: the observation, the proposed…
Aggregated purity results across four services, with caveats Replied, post #4 · Data & Tools › Datasets · 4 Nov 2025 · 9 likes Post #2 describes the usual case. This is about the unusual one. Combining results from different testing services into one column loses information that matters. Keep…
How to tell whether your question is already answered on a maintained page Replied, post #3 · Start Here › Welcome · 3 Nov 2025 · 0 likes The answer to the reading-order question is: the how-to-ask page, then whichever compound page applies to you, then the sourcing standard. Forty minutes and it saves…
Sleep quality changes during weight loss — what changed since Replied, post #46 · Wellbeing › Sleep · 31 Oct 2025 · 0 likes Post #43 answers the question as asked. The question underneath it is different. A sleep diary with times rather than impressions is the only way to tell a real change…
Particulates in a reconstituted solution: identifying the likely source Replied, post #15 · Analytics › Impurities & related substances · 20 Oct 2025 · 0 likes An update on my earlier particulates post: the pattern held for another six weeks and then stopped, which I did not predict and cannot explain.
Reading SURMOUNT-1 without the press release — one year on Replied, post #14 · Compounds › Tirzepatide · 13 Oct 2025 · 4 likes Worth separating two things that post #10 runs together. Injection-site reactions were reported at a low but non-zero rate across the trials. The practical point is…
A parcel that arrived warm: a decision process, not a verdict Replied, post #81 · Practice › Storage & stability · 12 Oct 2025 · 1 like Visible particulate is a strong signal in the other direction: it is a reason to stop and ask rather than to filter and proceed.
An inter-laboratory comparison on one lot, tabulated — what changed since Replied, post #5 · Analytics › Method validation · 9 Oct 2025 · 10 likes Range and working range are different things and a certificate rarely distinguishes them. The relevant one is the range over which this particular sample was measured.…
Why oral semaglutide needs an absorption enhancer at all Replied, post #39 · Compounds › Oral incretins · 6 Oct 2025 · 0 likes Marking my place. If it changes for me I will come back and say so.
Titles that describe the question, not the situation Replied, post #112 · Start Here › How to Ask · 3 Oct 2025 · 0 likes Picking up post #111: that is the part I would want checked first. My understanding of titles is a few years old and may have been superseded. If it has been, I would…
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #131 · Access › Insurance & coverage · 23 Sep 2025 · 8 likes Denial letters: the stated reason tells you exactly what to submit next. A denial is not final; it is a specification for an appeal. Reading the reason carefully and…
The nausea timeline across the first four weeks, with a tabulated log — what changed since Replied, post #6 · Practice › Side effects · 30 Aug 2025 · 12 likes The published rates come from populations that were titrated on a defined schedule with clinical supervision. Rates from a forum are not comparable and are biased by…
Tracking that stops updating and then resumes — the long version Replied, post #7 · Sourcing › Logistics · 21 Aug 2025 · 14 likes Split shipments reduce single-point risk and increase the number of transits. Which trade is right depends on what you are protecting against.
Follow-up: Why appetite effects are mostly central Replied, post #10 · Pharmacology › Receptor biology · 2 Aug 2025 · 10 likes I had written a reply contradicting post #8 and deleted it. Here is what survived. Long-term receptor changes: very little is known about what happens to receptor…
Pages past their review date, listed Replied, post #12 · Meta › Wiki maintenance · 1 Aug 2025 · 1 like I had written a reply contradicting post #8 and deleted it. Here is what survived. That matches how I use it. The general statement is what you check afterwards, not…
Coming back to: An 18-month record including the parts that went badly Replied, post #87 · Outcomes › Progress reports · 29 Jul 2025 · 7 likes Adding a note of thanks rather than an opinion. I did not know most of that.
[2026 update] Cardiovascular risk: reading the outcome trials as a set Replied, post #74 · Clinical › Comorbidities · 18 Jul 2025 · 24 likes Bariatric surgery history: altered anatomy after surgery affects absorption. That matters for oral medications and for reconstituted solutions. Discussing specific…
Discussing something you have already been doing — the long version Replied, post #11 · Clinical › Prescriber conversations · 9 Jul 2025 · 2 likes Bringing a record of symptoms with dates and severities makes an assessment materially easier and is the single most useful preparation. That is a description of…
Half-life, steady state, and accumulation worked through Replied, post #120 · Pharmacology › Pharmacokinetics · 15 Jun 2025 · 0 likes The useful distinction on half-life is between what was measured and what was inferred from it. Both end up in the same sentence and only one of them has error bars.
Second pass at: Trial registration and comparing the protocol with the paper Replied, post #25 · Evidence › Trials · 10 Jun 2025 · 22 likes Generalisability: the enrolled population was selected in ways that matter. Entry criteria, run-in periods, and the simple fact that people who agree to a multi-year…
[2026 update] An appeal that failed, and what I would do differently Replied, post #42 · Access › Insurance & coverage · 9 Jun 2025 · 0 likes No notes. Posting so the count is not one.
Reverting an edit that had no revision note Replied, post #8 · Meta › Wiki maintenance · 3 Jun 2025 · 0 likes Everything in post #6 holds. The case it does not cover is the one I have. Small methodological point on reverting an edit: repeating a measurement is cheap and…
Obstructive sleep apnoea and a hard endpoint in this class Replied, post #103 · Clinical › Comorbidities · 3 Jun 2025 · 3 likes Where I part company with post #99, and it is a narrow parting. Summarising the obstructive sleep apnoea thread so far, since it is long and the answer is buried: the…
Sequence verification for an obscure compound: how it is done Replied, post #42 · Compounds › Other compounds · 23 May 2025 · 0 likes Building on post #39 rather than restating it. An update on my earlier sequence verification post: the pattern held for another six weeks and then stopped, which I did…
Consistent declarations and why they matter more than clever ones — a second dataset Started this topic · Sourcing › Logistics · 21 May 2025 · 12 likes On the subject in the title: Consistent declarations and why they matter more than clever ones — a second dataset Working notes rather than a conclusion. Posting a…
Telehealth prescribing models in the US Replied, post #101 · Regional › North America · 20 May 2025 · 0 likes Post #100 is right about the mechanism and I think understates the practical bit. Offering a way to settle telehealth prescribing models rather than another opinion…
Lean mass preservation: what the evidence supports Replied, post #20 · Outcomes › Body composition · 17 May 2025 · 0 likes Post #16 and I disagree about the size of the effect, not about the direction. Lean mass preservation looks different depending on whether you are reading the primary…
Journal club: STEP 1 and the treatment-policy estimand — does this still hold? Replied, post #113 · Evidence › Journal club · 22 Apr 2025 · 16 likes Distinguishing three things in the STEP 1 discussion that keep getting used interchangeably: the observation, the proposed mechanism, and the recommendation that gets…
A well-designed study with a badly written abstract Replied, post #36 · Evidence › Study critique · 21 Apr 2025 · 3 likes Confirming post #35 from a second method, which matters more than confirming it from a second person. Answering the well-designed study question as asked, then the…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — the long version Replied, post #75 · Practice › Reconstitution · 9 Apr 2025 · 2 likes Choose the concentration so that a typical dose lands on a graduation you can actually read. A dose that falls between two marks on a 1 mL barrel is a dose you will get…
Why cagrilintide alone is discussed so much less than in combination Replied, post #55 · Compounds › Cagrilintide & amylin analogues · 29 Mar 2025 · 0 likes The confident answers on cagrilintide alone and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this category.
Reading an MS report that only gives you a single number Replied, post #38 · Analytics › Mass spectrometry · 27 Mar 2025 · 14 likes Post #37 is the version of this I will quote in future. One addition. Tandem mass spectrometry with fragmentation gives sequence information that intact mass cannot. It…
Maintainer handover: how it works Replied, post #81 · Meta › Wiki maintenance · 19 Mar 2025 · 19 likes Appreciated. The plain phrasing does more work here than a longer post would.
One lot is one lot: when a report becomes a pattern — the long version Replied, post #65 · Sourcing › Vendor reports · 17 Mar 2025 · 28 likes Multiple services on one lot: agreement across two independent laboratories is stronger than a high number from one. Our vendor pages deliberately mix services for that…
Delayed gastric emptying and oral medication absorption: which drugs matter Replied, post #9 · Practice › Interactions · 7 Mar 2025 · 2 likes Oral medications with a narrow therapeutic index are the ones where that matters most. The interaction is about rate and timing rather than about the total absorbed, in…
Pharmaceutical compounding rules, summarised from primary sources Replied, post #47 · Sourcing › Regulatory · 1 Mar 2025 · 0 likes Post #46 and I disagree about the size of the effect, not about the direction. The version of pharmaceutical compounding rules that circulates here is a simplification…
Distinguishing a deletion sequence by mass alone Replied, post #102 · Analytics › Mass spectrometry · 18 Feb 2025 · 0 likes Combining a chromatographic result with a mass result is genuinely orthogonal confirmation. Either alone leaves a specific class of problem invisible, and the two…
Biased agonism: a real phenomenon, an over-used explanation — what changed since Replied, post #47 · Pharmacology › Receptor biology · 9 Feb 2025 · 2 likes Post #45 describes the usual case. This is about the unusual one. The version of Biased agonism that circulates here is a simplification of a simplification. It is not…
Preparing for an appointment: one page, three questions Replied, post #7 · Clinical › Prescriber conversations · 8 Feb 2025 · 12 likes Written summaries after an appointment are available in many systems and are worth asking for, because recollection of a consultation is unreliable. It cost nothing to…
Consistent declarations and why they matter more than clever ones Replied, post #3 · Sourcing › Logistics · 6 Feb 2025 · 1 like On the opening post — agreed on the reasoning, with one qualification. Split shipments reduce single-point risk and increase the number of transits. Which trade is…
Feature request: should a dose-equivalence tool exist at all? Replied, post #18 · Data & Tools › Calculators · 24 Jan 2025 · 6 likes Do the arithmetic by hand the first few times, whatever tool you use afterwards. A calculator with a wrong input gives a confident wrong answer and there is nothing in…
Recovery when intake is low: what to cut first Replied, post #55 · Nutrition & Training › Resistance training · 13 Jan 2025 · 0 likes Two questions I would want answered before drawing anything from the recovery data above: how were the cases selected, and what happened to the ones that dropped out.
A promotion I argued against, and why I lost Replied, post #56 · Documentation › Doc review · 9 Jan 2025 · 19 likes Reviewing your own nomination is fine and is not sufficient. Somebody else has to read it for the process to mean anything.
Revisiting: Bug report: the reconstitution calculator and a rounding edge case Replied, post #45 · Data & Tools › Calculators · 8 Jan 2025 · 19 likes Answering the question post #41 raises rather than the one it answers. Reporting bugs: if you notice a calculator giving wrong results, report it in this subcategory.…
Oxidation pathways for methionine and tryptophan Replied, post #37 · Analytics › Impurities & related substances · 29 Dec 2024 · 0 likes An observation about oxidation pathways for methionine that I cannot explain and am posting anyway, on the principle that unexplained observations are more useful…
Second pass at: Pharmacy supply in the UK and the questions you will be asked Replied, post #4 · Regional › UK & Ireland · 9 Dec 2024 · 0 likes Taking the opening post at face value and following it one step further. Date the claim and say whether it is the United Kingdom or Ireland. They are different…
Washout with a one-week half-life: the arithmetic Replied, post #58 · Research Methods › N-of-1 designs · 3 Dec 2024 · 23 likes I think the washout question is answerable and has not been answered, which is a more optimistic position than most of this thread.
Follow-up: Escalating every six weeks instead of four: what I observed over eight months Replied, post #2 · Practice › Dosing & titration · 8 Nov 2024 · 0 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…
Coming back to: What consumer-accessible tests can and cannot determine Replied, post #5 · Analytics › Home & field testing · 10 Sep 2024 · 0 likes The arithmetic in post #2 is right; the assumption feeding it is the part to check. Molecular tests: DNA or RNA tests are not applicable to peptides, which do not…
Revisiting: US compounding rules and how they changed Replied, post #4 · Regional › North America · 16 Aug 2024 · 10 likes Everything in the opening post holds. The case it does not cover is the one I have. Both are useful and different. The account tells you what happens in practice; the…
How this community labels and discusses unrefereed work Replied, post #3 · Evidence › Preprints · 4 Jun 2024 · 1 like The honest position on most preprints in this field is that they are interesting and provisional, and that saying both is not fence-sitting.