r.erdogan

TL2 · Faro

Contributes reviews on supplier material. Based in Faro.

Joined 22 January 2025 · last posted 5d

87 posts, newest first. Showing up to 150.

Coming back to: Preparing for an appointment: one page, three questions Replied, post #34 · Clinical › Prescriber conversations · 22 Jul 2026 · 17 likes Post #32 and I disagree about the size of the effect, not about the direction. A question phrased as "what would you want to see before considering X" is answerable and…
Asking a follow-up: new topic or new reply? Replied, post #56 · Start Here › How to Ask · 16 Jul 2026 · 10 likes The arithmetic in post #54 is right; the assumption feeding it is the part to check. The bit of asking a follow-up that nobody enjoys is that the answer changes…
Transit times by route, from a logged dataset Replied, post #9 · Sourcing › Logistics · 14 Jul 2026 · 9 likes The same route behaves differently in different months. A single good or bad experience is one sample from a distribution.
Submitting a sample: the process end to end Replied, post #81 · Sourcing › Independent verification · 14 Jul 2026 · 20 likes I came in to disagree and I am leaving without a disagreement.
Common supplements people ask about, assessed one at a time Replied, post #40 · Practice › Interactions · 13 Jul 2026 · 30 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…
Osteoarthritis and mechanical versus metabolic improvement — one year on Replied, post #32 · Clinical › Comorbidities · 11 Jul 2026 · 19 likes Nothing to add on the substance. Thank you for taking the question at face value.
The most useful thing you learned here that was not the answer you came for Replied, post #57 · Lounge › Off topic · 9 Jul 2026 · 14 likes Non-technical and offered in the right category: the best thing about a forum with no vote score is that the boring accurate answer sits at the same level as the…
Revisiting: The best-written scientific paper you have read Replied, post #75 · Lounge › Off topic · 7 Jul 2026 · 0 likes Where the best-written scientific paper reasoning breaks down for me is the step from the group result to the individual case. That step is almost never argued for.
Revisiting: Protein density versus volume when you cannot eat much Replied, post #38 · Nutrition & Training › Protein & intake · 6 Jul 2026 · 20 likes I read post #35 twice before replying, because I had assumed the opposite. Timing of protein: spreading protein intake across the day, with some at each meal, is more…
Programming during a large energy deficit Replied, post #27 · Nutrition & Training › Resistance training · 28 Jun 2026 · 5 likes Post #24 describes the usual case. This is about the unusual one. Post-weight-loss training: once weight loss is complete and energy deficit ends, training can shift to…
What a reversed-phase purity number actually is Replied, post #8 · Analytics › HPLC & UHPLC · 28 Jun 2026 · 0 likes Post #6 is right about the mechanism and I think understates the practical bit. One more thing on reversed-phase purity number that took me far too long to see: the two…
Reading a home test result without over-claiming Replied, post #79 · Analytics › Home & field testing · 14 Jun 2026 · 1 like Anything that changes colour is measuring a reaction, and reactions have interferents. A positive result in the presence of an excipient you did not expect is not…
Racemisation and why it is invisible to a mass measurement Replied, post #103 · Analytics › Impurities & related substances · 14 Jun 2026 · 25 likes Speaking only to racemisation as I have actually seen it, rather than as it is usually described: the effect is real, it is smaller than the thread suggests, and the…
Micronutrient adequacy at low total intake Replied, post #50 · Nutrition & Training › Protein & intake · 10 Jun 2026 · 0 likes The arithmetic in post #48 is right; the assumption feeding it is the part to check. Two people in this thread mean different things by micronutrient adequacy and are…
Reflectance and photometric devices: precision in practice — a second dataset Replied, post #46 · Analytics › Home & field testing · 9 Jun 2026 · 1 like Post #45 is the version of this I will quote in future. One addition. Where the Reflectance and photometric devices reasoning breaks down for me is the step from the…
Submitting a sample: the process end to end Replied, post #6 · Sourcing › Independent verification · 7 Jun 2026 · 0 likes Post #4 put the caveat in the right place and I want to underline it. Independent measurement on a lot you bought yourself is the strongest evidence an individual can…
A certificate whose chromatogram axes do not match its stated method — one year on Replied, post #103 · Sourcing › Red flags · 6 Jun 2026 · 14 likes Adding the measurement that post #101 says would settle it. Practical note on certificate whose chromatogram axes: write down what you expect before you look. The…
Revisiting: Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #16 · Evidence › Journal club · 4 Jun 2026 · 5 likes Reading order that works for these sessions: registry entry, methods, baseline table, primary result, then abstract last. Reading the abstract first anchors everything…
Revisiting: Mean kinetic temperature explained without the mathematics Replied, post #65 · Practice › Storage & stability · 2 Jun 2026 · 0 likes Post #61 describes the usual case. This is about the unusual one. Adding a null result on Mean kinetic temperature. I looked, carefully, and found nothing, and null…
Electrolyte supplements: which ones do anything Replied, post #15 · Nutrition & Training › Hydration & electrolytes · 24 May 2026 · 0 likes The most useful posts here describe what was measured, what was changed, and what happened, in that order. The variance between people here is larger than the effect…
Revisiting: Patterns that reliably precede a problem, documented Replied, post #17 · Sourcing › Red flags · 22 May 2026 · 3 likes Worth separating two things that post #13 runs together. Nothing here should be read as an accusation against a named company, and the guidelines exist so that reports…
Washout with a one-week half-life: the arithmetic — does this still hold? Replied, post #18 · Research Methods › N-of-1 designs · 19 May 2026 · 10 likes Sensible. I would want the same detail before I acted on it either.
Coming back to: Reconciling a supplier certificate with an independent result Replied, post #5 · Sourcing › Vendor reports · 17 May 2026 · 2 likes Post #4 answers the question as asked. The question underneath it is different. Say in advance that you will post the result whatever it says. It costs nothing and it…
Second pass at: Sleep apnoea improving and the equipment implications Replied, post #24 · Wellbeing › Sleep · 29 Apr 2026 · 3 likes Where sleep worsened at the same time as an escalation and improved afterwards, that sequence is worth recording rather than reasoning about. I would put this at better…
Journal club: is percentage weight change the right endpoint? Replied, post #89 · Evidence › Journal club · 21 Apr 2026 · 0 likes Post #88 put the caveat in the right place and I want to underline it. Where the group cannot agree, record the disagreement rather than resolving it by seniority. The…
Converting between mg/mL and units per dose, both directions — the long version Replied, post #50 · Practice › Reconstitution · 21 Apr 2026 · 8 likes Preservative effectiveness is tested against a defined microbial challenge under defined conditions. It is not a licence to treat an entered vial as sterile…
Coming back to: When a red flag was a misunderstanding, and the retraction Replied, post #3 · Sourcing › Red flags · 20 Apr 2026 · 12 likes I changed my mind about red flag after someone here asked me for the source and I could not produce one. That is worth saying out loud because it is the ordinary way it…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full Replied, post #2 · Practice › Reconstitution · 28 Mar 2026 · 7 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…
Light exposure: how much protection is proportionate? Started this topic · Practice › Storage & stability · 21 Mar 2026 · 10 likes The question in the title: Light exposure: how much protection is proportionate? I will give what I have already checked below so nobody repeats it. Trying to establish…
Moderation log format change Replied, post #36 · Meta › Announcements · 15 Mar 2026 · 12 likes The most useful reply I ever got about moderation log format change was a request to state my units. It sounds like pedantry and it has saved me twice.
Revisiting: Maintainer handover: how it works Replied, post #29 · Meta › Wiki maintenance · 4 Mar 2026 · 12 likes That matches how I use it. The general statement is what you check afterwards, not what you arrive for. I would put this at better than even and not much better.
[2026 update] Journal club: PIONEER 6 as a safety trial Replied, post #16 · Evidence › Journal club · 1 Mar 2026 · 0 likes I had written a reply contradicting post #12 and deleted it. Here is what survived. If someone has run PIONEER 6 properly I would rather read that than my own…
Lean mass preservation: what the evidence supports — does this still hold? Replied, post #31 · Outcomes › Body composition · 22 Feb 2026 · 7 likes I would put moderate confidence on the mainstream reading of Lean mass preservation and no more. That is not scepticism for its own sake; it is where the sourcing…
Mass error in ppm: the arithmetic and the caveat Replied, post #33 · Analytics › Mass spectrometry · 13 Feb 2026 · 20 likes Post #32 answers the question as asked. The question underneath it is different. Tandem mass spectrometry with fragmentation gives sequence information that intact mass…
Follow-up: Bug report: the reconstitution calculator and a rounding edge case Replied, post #34 · Data & Tools › Calculators · 29 Jan 2026 · 4 likes Unit-conversion tools are only as good as the assumption they make about the syringe. Ask what barrel and what graduation interval it assumed before trusting the units…
Trifluoroacetate content and its consequences Replied, post #24 · Analytics › Impurities & related substances · 26 Jan 2026 · 30 likes Acknowledging rather than arguing. The reasoning holds as far as I can follow it.
Revisiting: A page that has drifted out of date and needs a maintainer Replied, post #42 · Documentation › Wiki requests · 17 Jan 2026 · 0 likes This follows post #41 rather than contradicting it. Authority and authorship: if you think a maintained page needs input from someone with specific expertise (a…
Muscle cramps: the ordinary causes before the exotic ones Replied, post #27 · Practice › Side effects · 15 Jan 2026 · 3 likes What I can speak to on muscle cramps is narrow, so I will keep it narrow rather than generalising from it. Beyond that boundary I do not know.
What to include when your question involves a chromatogram Replied, post #44 · Start Here › How to Ask · 15 Jan 2026 · 5 likes This follows post #43 rather than contradicting it. 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…
A partial dose because the pen emptied mid-injection Replied, post #115 · Practice › Administration · 11 Jan 2026 · 3 likes I had written a reply contradicting post #113 and deleted it. Here is what survived. Letting a refrigerated preparation come to room temperature before injecting…
Second pass at: How to ask a question when you cannot say why you are asking it Replied, post #41 · Start Here › How to Ask · 12 Dec 2025 · 0 likes On post #37 — agreed on the reasoning, with one qualification. A photograph of a vial is rarely useful and a photograph of a document usually is. Redact the identifiers…
DXA precision and the least significant change for lean mass Replied, post #20 · Outcomes › Body composition · 25 Nov 2025 · 1 like Post #17 is right about the mechanism and I think understates the practical bit. What I can speak to on DXA precision is narrow, so I will keep it narrow rather than…
Prescription requirements and telehealth models Replied, post #16 · Sourcing › Regulatory · 16 Nov 2025 · 0 likes An observation about prescription requirements and telehealth models that I cannot explain and am posting anyway, on the principle that unexplained observations are…
Second pass at: Journal club: STEP 4 and what a withdrawal design can prove Replied, post #89 · Evidence › Journal club · 6 Nov 2025 · 22 likes On post #88 — agreed on the reasoning, with one qualification. A conflict-of-interest statement is worth reading aloud and is worth very little as a predictor. Design…
SURMOUNT-4 and what withdrawal data does and does not tell an individual — one year on Replied, post #113 · Compounds › Tirzepatide · 24 Oct 2025 · 4 likes Picking up post #112: that is the part I would want checked first. I would be cautious about generalising from the SURMOUNT-4 example above. It is a good example. It is…
Reused chromatograms across lots: how to spot it Started this topic · Analytics › COA interpretation · 23 Oct 2025 · 25 likes On the subject in the title: Reused chromatograms across lots: how to spot it Working notes rather than a conclusion. Something about reused chromatograms across lots…
Coming back to: The SOUL trial and oral semaglutide cardiovascular outcomes Replied, post #51 · Compounds › Oral incretins · 19 Oct 2025 · 0 likes Oral versus injectable exposure: comparing a 14 mg oral dose with a 0.5 mg injectable dose is comparing apples to a different fruit. The oral bioavailability is low…
The nausea timeline across the first four weeks, with a tabulated log Replied, post #121 · Practice › Side effects · 5 Oct 2025 · 0 likes That is a fair summary of where the discussion has got to.
Micronutrient adequacy at low total intake — does this still hold? Replied, post #2 · Nutrition & Training › Protein & intake · 3 Oct 2025 · 10 likes I had written a reply contradicting the opening post and deleted it. Here is what survived. Two claims get bundled together under Micronutrient adequacy and they need…
Freeze-thaw and why one cycle is not the same as five — a second dataset Replied, post #48 · Practice › Storage & stability · 9 Sep 2025 · 10 likes The arithmetic on Freeze-thaw is the easy part and it is where the errors are, which is an uncomfortable combination. Show your working and someone will catch it.
Asking about a compound your prescriber has not heard of Replied, post #144 · Clinical › Prescriber conversations · 31 Aug 2025 · 2 likes I read post #142 twice before replying, because I had assumed the opposite. The most useful question anyone here has reported asking: what would make you change your…
What a purity-only report leaves out Replied, post #2 · Sourcing › Independent verification · 29 Aug 2025 · 8 likes What I would check first on purity-only is whether the thing being measured moved or whether the way of measuring it moved. Those look identical in a graph.
When a preprint is the best available evidence and we say so Replied, post #94 · Evidence › Preprints · 24 Aug 2025 · 0 likes Say it is a preprint in the first line rather than the last. Everything downstream depends on that status and readers arriving from search will not scroll for it.
[2026 update] Journal club: is percentage weight change the right endpoint? Replied, post #91 · Evidence › Journal club · 22 Aug 2025 · 10 likes Post #89 put the caveat in the right place and I want to underline it. Reading order that works for these sessions: registry entry, methods, baseline table, primary…
Airline travel with a temperature-sensitive injectable — what changed since Replied, post #62 · Devices › Cold chain · 12 Aug 2025 · 24 likes Post #61 is the version of this I will quote in future. One addition. On Airline travel: the maintained page in the documentation commons covers the general case with…
Why catalogue breadth is not evidence of anything — what changed since Replied, post #6 · Compounds › Other compounds · 25 Jul 2025 · 17 likes Post #4 and I disagree about the size of the effect, not about the direction. Practical answer on catalogue breadth, since the theoretical one is upthread: do the…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #146 · Compounds › Tirzepatide · 25 Jul 2025 · 12 likes Where I part company with post #144, and it is a narrow parting. Titration schedules for tirzepatide have more dose steps than semaglutide partly because the compound…
Revisiting: GLP-1 receptor distribution: central and peripheral Replied, post #18 · Pharmacology › Receptor biology · 20 Jul 2025 · 12 likes GLP-1 receptor signalling: the GLP-1 receptor is expressed on beta cells (insulin secretion), on neurons (appetite and gastric motility), and on myocardium…
Asking about a compound your prescriber has not heard of Replied, post #89 · Clinical › Prescriber conversations · 9 Jul 2025 · 21 likes Questions about dose: asking "how will we determine whether this dose is working for me" gets at the monitoring plan. Asking "can we start lower" or "can we escalate…
Follow-up: History of disordered eating and why it changes the conversation Replied, post #37 · Clinical › Special populations · 8 Jul 2025 · 28 likes I read post #35 twice before replying, because I had assumed the opposite. Being outside the studied population does not mean a treatment is unsafe. It means the usual…
[2026 update] Cardiovascular risk: reading the outcome trials as a set Replied, post #41 · Clinical › Comorbidities · 27 May 2025 · 6 likes Adding the measurement that post #40 says would settle it. Where somebody is on several medicines, the interaction question and the comorbidity question are entangled…
Pre-registering a personal experiment, seriously Replied, post #26 · Research Methods › N-of-1 designs · 27 May 2025 · 4 likes Post #23 answers the question as asked. The question underneath it is different. Pre-registering a personal experiment has been discussed here with more heat than it…
Reading a trial's population section before its results — does this still hold? Replied, post #152 · Evidence › Trials · 27 May 2025 · 24 likes Narrowing post #149, because the general version has more than one answer. An open-label trial is not worthless and its subjective endpoints deserve more scepticism…
Cost per milligram, computed honestly across formats — the long version Replied, post #101 · Access › Pricing · 15 May 2025 · 2 likes Price variation between pharmacies: identical prescriptions can cost different amounts at different pharmacies because pharmacies negotiate individually with insurers…
A 5 mg vial and a 0.25 mg dose: the arithmetic in full — what changed since Replied, post #67 · Practice › Reconstitution · 10 May 2025 · 4 likes Dead volume is the part nobody mentions until it costs them a dose. A fixed-needle insulin syringe holds very little; a detachable-needle luer configuration can hold…
Escalating every six weeks instead of four: what I observed over eight months — one year… Replied, post #23 · Practice › Dosing & titration · 27 Apr 2025 · 2 likes Building on post #20 rather than restating it. The practical version of Escalating every six weeks instead is three sentences long. The rigorous version is three pages…
Triple agonism: additive, synergistic, or neither? Replied, post #38 · Compounds › Retatrutide · 20 Apr 2025 · 0 likes Genuine question rather than a rhetorical one: has anyone here actually observed triple agonism, as opposed to read about it? The thread is long and I cannot tell.
Residual solvents and scavengers: what is looked for Replied, post #6 · marked as the solution · Analytics › Impurities & related substances · 23 Mar 2025 · 12 likes The confident answers on residual solvents and scavengers and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading…
Why we hide unevidenced fraud accusations and log the hiding Replied, post #67 · Sourcing › Red flags · 18 Mar 2025 · 22 likes Narrowing post #65, because the general version has more than one answer. The guidelines draw that line for a practical reason as much as a fair one: reports accumulate…
Review: a draft on reconstitution arithmetic, with objections Replied, post #57 · Documentation › Doc review · 13 Mar 2025 · 0 likes Reviewing your own nomination is fine and is not sufficient. Somebody else has to read it for the process to mean anything. Second-hand, so weight it accordingly.
Washout: how long is long enough, and for what purpose Replied, post #5 · Pharmacology › Pharmacokinetics · 19 Feb 2025 · 32 likes I had read the opposite somewhere and cannot now find where, which tells me something.
Adjudicated events and why the definition matters — the long version Replied, post #5 · Evidence › Trials · 8 Feb 2025 · 5 likes Helpful, and easy to find again, which is half of what a good reply is.
Tracking semaglutide's approved indications across jurisdictions, dated — does this… Replied, post #44 · Compounds › Semaglutide · 26 Nov 2024 · 0 likes On identity confirmation: a mass close to 4113.6 Da on the intact molecule is consistent with semaglutide and is also consistent with several closely related species.…
Telehealth prescribing models in the US Replied, post #26 · Regional › North America · 24 Nov 2024 · 8 likes Confirming post #24 from a second method, which matters more than confirming it from a second person. United States: FDA licenses compounds. Prescribing and pharmacy…
How to ask for a dose change without antagonising anyone — what changed since Replied, post #83 · Clinical › Prescriber conversations · 21 Nov 2024 · 6 likes The arithmetic in post #80 is right; the assumption feeding it is the part to check. Prescription logistics: confirm whether it will be filled locally, requires mail…
How to ask for a dose change without antagonising anyone — what changed since Replied, post #68 · Clinical › Prescriber conversations · 16 Nov 2024 · 0 likes Coming back to post #64, because the follow-up matters more than the original answer. A question phrased as "what would you want to see before considering X" is…
Transporting a vial for a weekend away Replied, post #41 · Practice › Storage & stability · 8 Nov 2024 · 10 likes Adding the measurement that post #38 says would settle it. Clarity is a weak test. A solution can lose a significant fraction of its active content to degradation or…
Amylin analogue mechanism: satiety signalling separate from GLP-1 Replied, post #19 · Compounds › Cagrilintide & amylin analogues · 6 Nov 2024 · 0 likes Following this. I have the same question and no better information than the first post.
Buffers, pH and why a formulation is a formulation Replied, post #6 · Pharmacology › Formulation chemistry · 27 Oct 2024 · 17 likes Sterility and stability are separate properties requiring separate controls. A preservative addresses one of them and nothing about the other. The number is defensible.…
Second pass at: A field-by-field walk through a certificate of analysis Replied, post #87 · Analytics › COA interpretation · 17 Oct 2024 · 0 likes Answering the question post #83 raises rather than the one it answers. Where the field-by-field walk through a certificate discussion usually stalls is that nobody…
Progressive overload when the scale is falling — one year on Replied, post #159 · Nutrition & Training › Resistance training · 14 Oct 2024 · 3 likes On post #157 — agreed on the reasoning, with one qualification. Nothing here is medical advice and anybody with a relevant condition should have a programme reviewed by…
What a stability-indicating method is and how you demonstrate one — one year on Replied, post #41 · Analytics › Method validation · 28 Sep 2024 · 6 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.
Second pass at: Sodium, potassium and magnesium when intake drops Replied, post #108 · Nutrition & Training › Hydration & electrolytes · 22 Sep 2024 · 24 likes Something worth flagging about Sodium: the strongest-sounding claims in this thread are the ones with no source attached, which is the usual pattern and not a…
A rising related-substance total over six months: degradation or method drift? Replied, post #37 · Analytics › Impurities & related substances · 5 Sep 2024 · 10 likes Truncation products: fragments from incomplete synthesis or from degradation. They elute quite differently from the intact peptide because they are much smaller and…
Orforglipron as a non-peptide: what changes when the molecule is small Replied, post #22 · Compounds › Oral incretins · 30 Aug 2024 · 13 likes Post #19 put the caveat in the right place and I want to underline it. Genuine question rather than a rhetorical one: has anyone here actually observed orforglipron, as…
Correlation in a self-tracked dataset: what it can support Replied, post #13 · Research Methods › Statistics · 20 Aug 2024 · 2 likes Genuine question rather than a rhetorical one: has anyone here actually observed correlation, as opposed to read about it? The thread is long and I cannot tell.
Promotion criteria, and the one that stops most nominations Replied, post #30 · Documentation › Doc review · 3 Aug 2024 · 8 likes Objections are genuinely wanted at this stage, because a bad promotion is much harder to undo than a bad reply.