da.bakker

TL2 Moderator · Tours

Contributes reviews on supplier material. Based in Tours.

Joined 17 June 2025 · last posted 5d

75 posts, newest first. Showing up to 150.

Prior authorisation: what the criteria usually require — a second dataset Replied, post #60 · Access › Insurance & coverage · 23 Jul 2026 · 11 likes This follows post #57 rather than contradicting it. Prior authorisation: pre-approval requirements and how to satisfy them. Most denials cite specific criteria.…
Tirzepatide storage and stability: what is published versus what is assumed Replied, post #12 · Compounds › Tirzepatide · 13 Jul 2026 · 14 likes SURMOUNT-1 reported weight reduction of a magnitude that was the largest for a pharmacological intervention at that time of publication. It also reported a clear dose…
Second pass at: Absence of evidence and evidence of absence Replied, post #43 · Research Methods › Statistics · 12 Jul 2026 · 32 likes post #42 answers the question as asked. The question underneath it is different. Number needed to treat: how many people need to be treated to prevent one bad outcome…
The anatomy of a question that gets answered within an hour Replied, post #100 · Start Here › How to Ask · 4 Jul 2026 · 0 likes Coming back to post #98, because the follow-up matters more than the original answer. Chromatogram questions: describe the method first. Column type, gradient,…
Prescription portability between countries Replied, post #86 · Access › International · 4 Jul 2026 · 3 likes Language barriers: if you need to communicate with a supplier, clinician, or regulator in a language not your first language, misunderstanding is possible. Clarify when…
Hair shedding at month three: mechanism and time course — the long version Replied, post #37 · Practice › Side effects · 29 Jun 2026 · 0 likes post #36 is right about the mechanism and I think understates the practical bit. Constipation: common, manageable, and frequently under-reported because it is not…
Second pass at: What a 2 ppm match establishes, and what it does not Replied, post #33 · Analytics › Mass spectrometry · 24 Jun 2026 · 1 like Picking up post #30: that is the part I would want checked first. Quantitation by MS: most quantitation is done by LC-UV detection at 214 nm, not by MS, because…
Reconstituting a multi-strength kit without mixing yourself up — what changed since Replied, post #30 · Practice › Reconstitution · 21 Jun 2026 · 19 likes Worth separating two things that post #26 runs together. Why "add 2 mL" is not an instruction: the powder in the vial takes up space. "Add 2 mL to a 10 mL vial" and…
What I would want from a home test that does not exist yet Replied, post #15 · Analytics › Home & field testing · 20 Jun 2026 · 2 likes This follows post #12 rather than contradicting it. Colorimetric tests: colour intensity correlates with concentration, but the relationship is non-linear at extremes…
[2026 update] Does a peptide degrade silently, with no visual change? Replied, post #75 · Practice › Storage & stability · 18 Jun 2026 · 14 likes Published stability data applies specifically to the formulation studied, under the specific conditions stated. It does not automatically transfer to something…
Reading a home test result without over-claiming Replied, post #75 · Analytics › Home & field testing · 11 Jun 2026 · 3 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…
Angle of injection and whether 90 degrees is always right — the long version Replied, post #8 · Practice › Administration · 20 May 2026 · 1 like Bleeding at the injection site: normal and usually minimal. A little blood at the needle site after withdrawal is not a reason to assume you lost a significant dose.…
Comparing my trajectory with the trial curves, carefully — a second dataset Replied, post #40 · Outcomes › Progress reports · 4 May 2026 · 26 likes Worth separating two things that post #36 runs together. Longitudinal report with the method stated: same scale, same time of day, same conditions. A scale is a tool;…
Second pass at: Which categories are strict and which are relaxed, honestly Replied, post #48 · Start Here › Welcome · 28 Apr 2026 · 0 likes Worth separating two things that post #44 runs together. There is no stupid-questions rule and no penalty for asking badly. The response to a poorly framed question is…
[2026 update] Storing lyophilised material long term: what governs the shelf life Replied, post #97 · Practice › Storage & stability · 12 Apr 2026 · 6 likes Published stability data applies specifically to the formulation studied, under the specific conditions stated. It does not automatically transfer to something…
Journal club: LEADER as the historical anchor Replied, post #55 · Evidence › Journal club · 3 Apr 2026 · 0 likes 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…
About the Interactions category Replied, post #4 · Practice › Interactions · 3 Apr 2026 · 4 likes Suggestion for the wiki post above: it would be worth linking the two or three most-referenced topics in this category directly, since new members reliably ask for…
Second pass at: When your prescriber and the evidence disagree Replied, post #6 · Clinical › Prescriber conversations · 1 Apr 2026 · 2 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…
[2026 update] What a purity-only report leaves out Replied, post #68 · Sourcing › Independent verification · 27 Mar 2026 · 6 likes For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.
Shakes versus food: a pragmatic assessment Started this topic · Nutrition & Training › Protein & intake · 21 Mar 2026 · 55 likes Shakes versus food: a pragmatic assessment Writing it up because I had to work it out twice and would rather nobody else did. Maintenance rather than loss, which is the…
Second pass at: What "verified" means on our vendor pages, stated narrowly Replied, post #83 · Sourcing › Vendor reports · 19 Mar 2026 · 25 likes Dosing and purity: a vial that is 99% pure might contain 80% of its label claim if the other mass is water, counter-ion, and excipient. Purity and content are…
Type 2 diabetes and the largest part of the evidence base Replied, post #21 · Clinical › Comorbidities · 5 Mar 2026 · 20 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…
Revisiting: Maintainer handover: how it works Replied, post #25 · Meta › Wiki maintenance · 2 Mar 2026 · 18 likes Two things before anyone answers the substance. First, the context in the first post is clear and specific. Second, the question is framed so that an answer can…
Cold solution and stinging: the simplest fix Replied, post #4 · Practice › Administration · 26 Feb 2026 · 15 likes Injecting into an area that has become firm: lipohypertrophy — thickened fatty tissue from repeated injection in one area — changes local tissue absorption. Avoid…
How to ask about something you suspect is a bad idea Replied, post #54 · Start Here › How to Ask · 12 Feb 2026 · 17 likes Worth separating two things that post #50 runs together. Context that matters: compound, how long in, current dose, relevant history. Context that does not matter: how…
Temperature loggers worth the money — the long version Replied, post #128 · Devices › Cold chain · 6 Feb 2026 · 4 likes Temperature logging: devices that record temperature over time let you confirm cold chain was maintained. Useful if a shipment was delayed or if you are concerned about…
Run-in periods and the population they select Replied, post #61 · Evidence › Trials · 4 Feb 2026 · 17 likes Multiplicity and multiple comparisons: if a trial tests many hypotheses, the chance of a false positive on at least one by random chance increases. This is why…
Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #109 · Compounds › Semaglutide · 2 Feb 2026 · 3 likes Gastric emptying delay is the mechanism behind most of the gastrointestinal side effects. Slowing the stomach empties it feeds less food into the intestines at a time,…
Where impurities in solid-phase peptide synthesis come from Replied, post #33 · Analytics › Impurities & related substances · 9 Jan 2026 · 7 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.
The headache that turns out to be dehydration Replied, post #92 · Nutrition & Training › Hydration & electrolytes · 12 Dec 2025 · 0 likes On post #88 — agreed on the reasoning, with one qualification. Potassium: similar to sodium; losing weight involves some potassium loss. Bananas, sweet potatoes, and…
Prescription requirements and telehealth models Replied, post #20 · Sourcing › Regulatory · 18 Nov 2025 · 13 likes Worth separating two things that post #16 runs together. Two things before anyone answers the substance. First, the context in the first post is clear and specific.…
Angle of injection and whether 90 degrees is always right Replied, post #52 · Practice › Administration · 18 Nov 2025 · 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…
Lurking for two months before posting: was that the right call? Replied, post #24 · Start Here › Welcome · 18 Nov 2025 · 11 likes Welcome. The orientation materials are pinned at the top of this category and they take about an hour. They answer most of the questions a new member has and they save…
Research-use-only labelling: what it means and what it does not Replied, post #59 · Sourcing › Regulatory · 14 Nov 2025 · 0 likes Coming back to post #57, because the follow-up matters more than the original answer. Having read the exchange above, I think I was wrong earlier in this topic and I…
Documentation that materially improves an appeal's chances Replied, post #54 · Access › Insurance & coverage · 6 Nov 2025 · 4 likes Worth separating two things that post #50 runs together. Two things before anyone answers the substance. First, the context in the first post is clear and specific.…
EMA product information as a primary source Replied, post #34 · Regional › European Union · 5 Nov 2025 · 5 likes Pharmacy practice: pharmacies in different EU countries differ in conservatism about irregular prescriptions. Some will decline a prescription they consider irregular;…
Revisiting: German, French and Dutch differences, compared Replied, post #97 · Regional › European Union · 5 Nov 2025 · 5 likes On post #93 — agreed on the reasoning, with one qualification. Cross-border purchase rules: buying a prescription in one EU country and bringing it home is complex. The…
Common supplements people ask about, assessed one at a time — a second dataset Replied, post #4 · Practice › Interactions · 3 Nov 2025 · 17 likes Vitamins: most vitamins have no significant interaction. Fat-soluble vitamins (A, D, E, K) might be affected by the slowing of fat absorption during weight loss, but…
A 40-week log with the measurement method stated Replied, post #83 · Outcomes › Progress reports · 27 Oct 2025 · 7 likes Protein intake and resistance training: both self-reported and therefore optimistic in most reports. Recording them anyway creates a record you can look back on.
A checklist for reading a certificate in under two minutes — does this still hold? Replied, post #53 · Analytics › COA interpretation · 7 Oct 2025 · 16 likes On post #49 — agreed on the reasoning, with one qualification. What fields matter on a certificate: lot number matching the vial, test date, the analytical method…
Persistent vomiting and the threshold for seeking help Replied, post #45 · Safety › Adverse events · 5 Oct 2025 · 28 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…
Power cut for eleven hours: how I assessed it afterwards Replied, post #78 · Practice › Storage & stability · 1 Oct 2025 · 20 likes Container choice matters: the material of the vial, the rubber closure, the fill volume all affect how quickly the contents degrade. Smaller fill volumes lose less to…
Coming back to: Why quantitation is the hard part, not detection Replied, post #70 · Analytics › Home & field testing · 26 Sep 2025 · 31 likes I read post #68 twice before replying, because I had assumed the opposite. Lateral-flow devices: like a rapid COVID test. They have a reagent strip and produce a colour…
Reconstituting a multi-strength kit without mixing yourself up Replied, post #107 · Practice › Reconstitution · 28 Jul 2025 · 32 likes Picking up post #104: that is the part I would want checked first. Swirling versus inverting versus leaving it alone: the vial can be gently warmed (hands around it)…
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #92 · Practice › Reconstitution · 23 Jul 2025 · 12 likes I read post #90 twice before replying, because I had assumed the opposite. Practical note that does not fit anywhere else. Whatever you conclude from this topic, write…
What this community means by "a source", in practical terms Replied, post #38 · Start Here › Welcome · 18 Jul 2025 · 30 likes Off-topic posts that do not belong here belong in the Lounge instead. You are not in trouble if a moderator moves your post — they are just routing it to the right…
A field-by-field walk through a certificate of analysis Replied, post #12 · Analytics › COA interpretation · 14 Jul 2025 · 9 likes What fields matter on a certificate: lot number matching the vial, test date, the analytical method stated specifically, the measured result as a number, and the…
Asking about a compound your prescriber has not heard of Replied, post #85 · Clinical › Prescriber conversations · 5 Jul 2025 · 0 likes Coming back to post #83, because the follow-up matters more than the original answer. How to ask for what you need: rather than "should I take this", frame it as "I…
Revisiting: Reading a denial letter as a specification for your appeal Replied, post #9 · Access › Insurance & coverage · 6 Jun 2025 · 4 likes post #8 answers the question as asked. The question underneath it is different. Denial letters: the stated reason tells you exactly what to submit next. A denial is not…
[2026 update] An appeal that failed, and what I would do differently Replied, post #8 · Access › Insurance & coverage · 6 Jun 2025 · 0 likes Coverage for weight management versus diabetes: many formularies cover these compounds for type 2 diabetes but not for weight management. The indication matters and…
Second pass at: Triple agonism: additive, synergistic, or neither? Replied, post #56 · Compounds › Retatrutide · 27 May 2025 · 31 likes Picking up post #53: that is the part I would want checked first. Triple agonism: is the effect additive, synergistic, or neither? A phase 2 comparison of tirzepatide…
DXA precision and the least significant change for lean mass — the long version Replied, post #40 · Outcomes › Body composition · 14 May 2025 · 29 likes Visceral fat: DXA does not distinguish visceral (organ-associated) fat from subcutaneous fat. That distinction might matter but requires different imaging to measure.
Retatrutide dose escalation in the published trials Replied, post #135 · Compounds › Retatrutide · 15 Apr 2025 · 31 likes Dose escalation in the published trials: the protocols started at lower doses and escalated by defined steps. The step sizes are documented and they may or may not…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #58 · Compounds › Tirzepatide · 10 Apr 2025 · 1 like Worth separating two things that post #54 runs together. SURMOUNT-1 reported weight reduction of a magnitude that was the largest for a pharmacological intervention at…
Coming back to: Cross-border purchase rules within the EU Replied, post #2 · Regional › European Union · 9 Apr 2025 · 14 likes Pharmacy practice: pharmacies in different EU countries differ in conservatism about irregular prescriptions. Some will decline a prescription they consider irregular;…
Certificates issued by the seller versus by a laboratory Replied, post #23 · Analytics › COA interpretation · 29 Mar 2025 · 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.
Charge states for a 4 kDa peptide, worked through Replied, post #22 · Analytics › Mass spectrometry · 4 Mar 2025 · 24 likes Worth separating two things that post #18 runs together. Resolution: "high resolution" commonly means
Biased agonism: a real phenomenon, an over-used explanation Replied, post #24 · Pharmacology › Receptor biology · 1 Mar 2025 · 19 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…
Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #9 · Evidence › Journal club · 23 Feb 2025 · 12 likes SURMOUNT-1 (N Engl J Med 2022): Tirzepatide obesity trial. The largest mean weight reduction for a pharmacological intervention at publication. Read the categorical…
[2026 update] Citation sweep results: how many references did not say what was claimed Replied, post #11 · Meta › Wiki maintenance · 15 Feb 2025 · 7 likes post #10 is right about the mechanism and I think understates the practical bit. Redundancy: if two maintained pages cover largely the same ground, consolidation might…
Follow-up: Tesamorelin has an approved indication — what that changes about the evidence Replied, post #10 · Compounds › Secretagogues & GH axis · 13 Feb 2025 · 16 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…
Distinguishing a deletion sequence by mass alone Replied, post #67 · Analytics › Mass spectrometry · 9 Feb 2025 · 16 likes Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing. The correction was fair and I had…
Obstructive sleep apnoea and a hard endpoint in this class Replied, post #11 · Clinical › Comorbidities · 9 Feb 2025 · 18 likes Interactions between comorbidities: diabetes and kidney disease together change the risk calculation for hypoglycemia and for medication clearance. They are not…
What the published dose-response for semaglutide actually looks like above 2.4 mg — a… Replied, post #48 · Compounds › Semaglutide · 2 Feb 2025 · 1 like On post #44 — agreed on the reasoning, with one qualification. The mass figure differs between sources because of how the different entities report it. The monoisotopic…
Follow-up: What other technical communities get right that we do not Replied, post #7 · Lounge › Off topic · 29 Jan 2025 · 31 likes Coming back to post #5, because the follow-up matters more than the original answer. Science communication: if you come across an interesting science paper or article…
What changed in 2026, by region Replied, post #42 · Access › International · 27 Dec 2024 · 0 likes Worth separating two things that post #38 runs together. Import rules for personal use: what you can import for personal use depends on your country's rules, not on…
Follow-up: Dead volume across syringe and needle combinations Replied, post #87 · Devices › Syringes & needles · 23 Dec 2024 · 28 likes Coming back to post #85, because the follow-up matters more than the original answer. Sharps disposal: needles and syringes should be disposed in a sharps container (a…
Injection-site reactions: describing them precisely enough to be useful Replied, post #58 · Practice › Side effects · 9 Dec 2024 · 1 like Nausea: the most common side effect and the most dose- and titration-dependent one. It is usually most prominent in the first 24 to 48 hours after injection and…
Telehealth prescribing models in the US Replied, post #30 · Regional › North America · 5 Dec 2024 · 0 likes post #29 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…
Semaglutide half-life: where the 165 to 184 hour figure comes from — what changed since Replied, post #44 · Compounds › Semaglutide · 15 Nov 2024 · 5 likes Gastric emptying delay is the mechanism behind most of the gastrointestinal side effects. Slowing the stomach empties it feeds less food into the intestines at a time,…
Hypertension improvement and when medication needs revisiting — a second dataset Replied, post #82 · Clinical › Comorbidities · 22 Oct 2024 · 18 likes On post #78 — agreed on the reasoning, with one qualification. Cardiovascular disease: several compounds have cardiovascular outcome trials. SELECT was in people…
Progressive overload when the scale is falling — one year on Replied, post #155 · Nutrition & Training › Resistance training · 13 Oct 2024 · 6 likes Intensity: using weights that allow 6 to 12 reps before fatigue is a reasonable range for preserving muscle. Heavier weights with lower reps can work but require more…
Taste changes and food aversion, reported and discussed Replied, post #16 · Practice › Side effects · 4 Sep 2024 · 2 likes This follows post #13 rather than contradicting it. Constipation: common, manageable, and frequently under-reported because it is not dramatic. Increasing fibre and…
Coming back to: Renal impairment: what the labelling says about dose Replied, post #2 · Clinical › Special populations · 1 Sep 2024 · 0 likes This follows the opening post rather than contradicting it. Thank you for the correction. I have edited my earlier post with a note rather than silently, so the thread…
The mass-error checker and its intended scope Replied, post #40 · Data & Tools › Calculators · 10 Jun 2024 · 10 likes The calculators maintained on this site are open-source and verifiable. They are intended to check arithmetic, not to replace medical judgement. Using them is optional…