da.bakker

TL2 · 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 I came in to disagree and I am leaving without a disagreement.
Tirzepatide storage and stability: what is published versus what is assumed Replied, post #12 · Compounds › Tirzepatide · 13 Jul 2026 · 14 likes Titration schedules for tirzepatide have more dose steps than semaglutide partly because the compound is more potent and partly because the clinical programme used a…
Second pass at: Absence of evidence and evidence of absence Replied, post #43 · Research Methods › Statistics · 12 Jul 2026 · 32 likes This follows post #41 rather than contradicting it. The practical version of Absence of evidence is three sentences long. The rigorous version is three pages and…
The anatomy of a question that gets answered within an hour Replied, post #100 · Start Here › How to Ask · 4 Jul 2026 · 0 likes Everything in post #98 holds. The case it does not cover is the one I have. If the answer you got does not fit your case, say which part does not fit rather than…
Prescription portability between countries Replied, post #86 · Access › International · 4 Jul 2026 · 3 likes Acknowledging rather than arguing. The reasoning holds as far as I can follow it.
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. For anyone finding this later: the short answer on Hair shedding is that it depends on…
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 Following this. I have the same question and no better information than the first post.
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. Reconstituting a multi-strength kit is one of those subjects where the general answer and the answer for a…
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 Confirming post #12 from a second method, which matters more than confirming it from a second person. A control sample of known material run alongside is what turns a…
[2026 update] Does a peptide degrade silently, with no visual change? Replied, post #75 · Practice › Storage & stability · 18 Jun 2026 · 14 likes Practical note on peptide: write down what you expect before you look. The number of times I have found what I went looking for is higher than chance would allow.
Reading a home test result without over-claiming Replied, post #75 · Analytics › Home & field testing · 11 Jun 2026 · 3 likes A home refractometer is not measuring what people hope it is measuring in these preparations, and the readings are dominated by everything other than the peptide.
Angle of injection and whether 90 degrees is always right — the long version Replied, post #8 · Practice › Administration · 20 May 2026 · 1 like Angle of injection: 90 degrees into pinched tissue ensures subcutaneous placement. It is not always necessary and shallower angles can work, but 90 degrees into a small…
Comparing my trajectory with the trial curves, carefully — a second dataset Replied, post #40 · Outcomes › Progress reports · 4 May 2026 · 26 likes Post #36 and I disagree about the size of the effect, not about the direction. Rate of change matters more than the absolute number for most of the questions people ask…
Second pass at: Which categories are strict and which are relaxed, honestly Replied, post #48 · Start Here › Welcome · 28 Apr 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…
[2026 update] Storing lyophilised material long term: what governs the shelf life Replied, post #97 · Practice › Storage & stability · 12 Apr 2026 · 6 likes Dry storage in a freezer is generally more protective than a refrigerator for long periods, provided the material is genuinely dry and the container genuinely sealed.…
Journal club: LEADER as the historical anchor Replied, post #55 · Evidence › Journal club · 3 Apr 2026 · 0 likes Sessions on negative or null results are consistently the most instructive and the hardest to get anyone to attend. This is the sort of thing that ought to be settled…
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 A question phrased as "what would you want to see before considering X" is answerable and is not a request for X.
[2026 update] What a purity-only report leaves out Replied, post #68 · Sourcing › Independent verification · 27 Mar 2026 · 6 likes Repeat testing: if you want to verify the same lot a second time, testing with a different service strengthens the conclusion. Testing with the same service verifies…
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. I would like to know what people here…
Second pass at: What "verified" means on our vendor pages, stated narrowly Replied, post #83 · Sourcing › Vendor reports · 19 Mar 2026 · 25 likes The cost of a submission is worth stating. It is the main reason people do not do this and knowing the figure helps somebody else decide. That has been true for the…
Type 2 diabetes and the largest part of the evidence base Replied, post #21 · Clinical › Comorbidities · 5 Mar 2026 · 20 likes On type 2 diabetes, the part that usually goes wrong is that the question is asked as though it has one answer. It has a range, and the width of the range is the…
Revisiting: Maintainer handover: how it works Replied, post #25 · Meta › Wiki maintenance · 2 Mar 2026 · 18 likes Adding the boring version of Maintainer handover, because the interesting version keeps getting posted and the boring one is usually right. Check the ordinary…
Cold solution and stinging: the simplest fix Replied, post #4 · Practice › Administration · 26 Feb 2026 · 15 likes I would call the community position on cold solution and stinging likely rather than established, and I would be comfortable defending that hedge.
How to ask about something you suspect is a bad idea Replied, post #54 · Start Here › How to Ask · 12 Feb 2026 · 17 likes Everything in post #52 holds. The case it does not cover is the one I have. Timeline questions need the timeline. Dates, in order, with what happened on each. "A while…
Temperature loggers worth the money — the long version Replied, post #128 · Devices › Cold chain · 6 Feb 2026 · 4 likes Insulation performance depends on the mass of the coolant more than on the thickness of the box. A large pack in a modest box outperforms a small pack in a good one.…
Run-in periods and the population they select Replied, post #61 · Evidence › Trials · 4 Feb 2026 · 17 likes Run-in periods 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.
Semaglutide half-life: where the 165 to 184 hour figure comes from Replied, post #109 · Compounds › Semaglutide · 2 Feb 2026 · 3 likes Agreed on all of that, and I have nothing to add to it.
Where impurities in solid-phase peptide synthesis come from Replied, post #33 · Analytics › Impurities & related substances · 9 Jan 2026 · 7 likes Incomplete deprotection leaves a protecting group attached, raising the mass substantially and usually pushing retention much later. A late-eluting peak on a peptide…
The headache that turns out to be dehydration Replied, post #92 · Nutrition & Training › Hydration & electrolytes · 12 Dec 2025 · 0 likes Post #88 put the caveat in the right place and I want to underline it. Where there is a genuine question, a measurement answers it and a supplement does not. Blood…
Prescription requirements and telehealth models Replied, post #20 · Sourcing › Regulatory · 18 Nov 2025 · 13 likes Post #16 put the caveat in the right place and I want to underline it. Scheduling and prescription status are separate questions and the answer to one does not imply…
Angle of injection and whether 90 degrees is always right Replied, post #52 · Practice › Administration · 18 Nov 2025 · 0 likes Angle of injection: 90 degrees into pinched tissue ensures subcutaneous placement. It is not always necessary and shallower angles can work, but 90 degrees into a small…
Lurking for two months before posting: was that the right call? Replied, post #24 · Start Here › Welcome · 18 Nov 2025 · 11 likes Worth knowing early: the archive is not retrospectively corrected. A topic from two years ago was accurate when written and may not be now. Every post carries its date…
Research-use-only labelling: what it means and what it does not Replied, post #59 · Sourcing › Regulatory · 14 Nov 2025 · 0 likes I read post #57 twice before replying, because I had assumed the opposite. Research-use-only labelling would be much easier to settle if anyone reported the…
Documentation that materially improves an appeal's chances Replied, post #54 · Access › Insurance & coverage · 6 Nov 2025 · 4 likes Post #50 put the caveat in the right place and I want to underline it. I would call the community position on documentation likely rather than established, and I would…
EMA product information as a primary source Replied, post #34 · Regional › European Union · 5 Nov 2025 · 5 likes Acknowledging rather than arguing. The reasoning holds as far as I can follow it.
Revisiting: German, French and Dutch differences, compared Replied, post #97 · Regional › European Union · 5 Nov 2025 · 5 likes Worth separating two things that post #93 runs together. German: I would want to see the raw numbers rather than the summary before agreeing. Summaries lose exactly the…
Common supplements people ask about, assessed one at a time — a second dataset Replied, post #4 · Practice › Interactions · 3 Nov 2025 · 17 likes An update on my earlier Common supplements post: the pattern held for another six weeks and then stopped, which I did not predict and cannot explain.
A 40-week log with the measurement method stated Replied, post #83 · Outcomes › Progress reports · 27 Oct 2025 · 7 likes Something worth flagging about 40-week log: the strongest-sounding claims in this thread are the ones with no source attached, which is the usual pattern and not a…
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 Answering the question post #49 raises rather than the one it answers. Counter-ion form is crucial: peptides are isolated as salts, most often trifluoroacetate from…
Persistent vomiting and the threshold for seeking help Replied, post #45 · Safety › Adverse events · 5 Oct 2025 · 28 likes Persistent vomiting has been discussed here with more heat than it deserves, mostly because two definitions have been in play the whole time.
Power cut for eleven hours: how I assessed it afterwards Replied, post #78 · Practice › Storage & stability · 1 Oct 2025 · 20 likes Power cut for eleven hours sits at the boundary between what this community can usefully discuss and what it cannot, and I think it falls on the discussable side,…
Coming back to: Why quantitation is the hard part, not detection Replied, post #70 · Analytics › Home & field testing · 26 Sep 2025 · 31 likes Answering the question post #67 raises rather than the one it answers. Ultraviolet absorbance at 280 nanometres estimates concentration for peptides containing aromatic…
Reconstituting a multi-strength kit without mixing yourself up Replied, post #107 · Practice › Reconstitution · 28 Jul 2025 · 32 likes Building on post #105 rather than restating it. Reframing reconstituting a multi-strength kit slightly, because I think the disagreement is about the question rather…
A 10 mg vial reconstituted three different ways, compared — the long version Replied, post #92 · Practice › Reconstitution · 23 Jul 2025 · 12 likes Coming back to post #90, because the follow-up matters more than the original answer. Do not shake. Swirl, or leave it. Vigorous agitation introduces air and shear, and…
What this community means by "a source", in practical terms Replied, post #38 · Start Here › Welcome · 18 Jul 2025 · 30 likes On the reading order question specifically: start with the how-to-ask materials in this category, then read the one to three subcategories where your main questions…
A field-by-field walk through a certificate of analysis Replied, post #12 · Analytics › COA interpretation · 14 Jul 2025 · 9 likes Endotoxin testing is separate: a certificate of purity says nothing about endotoxin. A chemically pure preparation can carry a clinically significant endotoxin load. If…
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 #82, because the follow-up matters more than the original answer. Bringing a record of symptoms with dates and severities makes an assessment…
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 The confident answers on appeal and the well-sourced answers are not the same answers, which is the most useful thing I have learned reading this category.
Second pass at: Triple agonism: additive, synergistic, or neither? Replied, post #56 · Compounds › Retatrutide · 27 May 2025 · 31 likes Post #53 is the version of this I will quote in future. One addition. Second-hand on Triple agonism, so weight it accordingly — someone whose method I trust told me…
DXA precision and the least significant change for lean mass — the long version Replied, post #40 · Outcomes › Body composition · 14 May 2025 · 29 likes Comparison to published data: the trials reported mean fat and lean mass changes. Individual results vary around that mean. Being above or below average is not a sign…
Retatrutide dose escalation in the published trials Replied, post #135 · Compounds › Retatrutide · 15 Apr 2025 · 31 likes Retatrutide is investigational. Anything obtained outside a trial is by definition research-use-only material with no human-use authorisation. This site will state that…
Tirzepatide in type 2 diabetes: the SURPASS programme, summarised honestly Replied, post #58 · Compounds › Tirzepatide · 10 Apr 2025 · 1 like That is consistent with mine, for whatever one more account is worth.
Coming back to: Cross-border purchase rules within the EU Replied, post #2 · Regional › European Union · 9 Apr 2025 · 14 likes I have no financial interest in anything named in this thread and I want to say so before I comment on Cross-border purchase rules within, because it is the sort of…
Certificates issued by the seller versus by a laboratory Replied, post #23 · Analytics › COA interpretation · 29 Mar 2025 · 10 likes The distinction between release testing and characterisation is one industrial documents make and retail ones usually do not. It is the difference between "we tested…
Charge states for a 4 kDa peptide, worked through Replied, post #22 · Analytics › Mass spectrometry · 4 Mar 2025 · 24 likes Post #18 and I disagree about the size of the effect, not about the direction. Marking my uncertainty on charge states explicitly. I am confident about the direction,…
Biased agonism: a real phenomenon, an over-used explanation Replied, post #24 · Pharmacology › Receptor biology · 1 Mar 2025 · 19 likes Biased agonism — where different ligands at the same receptor favour different downstream pathways — is a plausible explanation for differences between compounds in…
Journal club: SURMOUNT-OSA and a hard endpoint in a soft field Replied, post #9 · Evidence › Journal club · 23 Feb 2025 · 12 likes Careful with the language on SURMOUNT-OSA. "Not detected" and "not present" are different findings and the first is a statement about the method.
[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 That is a cleaner way of putting what I was circling around.
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 A mass result for a short peptide is more discriminating than for a long one, because a single residue difference is a larger proportion of the total. That makes…
Distinguishing a deletion sequence by mass alone Replied, post #67 · Analytics › Mass spectrometry · 9 Feb 2025 · 16 likes I would be cautious about generalising from the distinguishing a deletion sequence example above. It is a good example. It is one example.
Obstructive sleep apnoea and a hard endpoint in this class Replied, post #11 · Clinical › Comorbidities · 9 Feb 2025 · 18 likes The claim about obstructive sleep apnoea upthread is stronger than its source supports. I have read the source. The source says "associated with" and the post says…
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 Where I part company with post #44, and it is a narrow parting. On the injection-day question: the labelling for licensed semaglutide allows the day to be changed…
Follow-up: What other technical communities get right that we do not Replied, post #7 · Lounge › Off topic · 29 Jan 2025 · 31 likes A digression that keeps occurring to me: the most-linked documents here are the dullest ones. Nothing gets cited like the unit-arithmetic page. Genuinely open to being…
What changed in 2026, by region Replied, post #42 · Access › International · 27 Dec 2024 · 0 likes Post #38 and I disagree about the size of the effect, not about the direction. Nothing here is legal advice, and in this subcategory that caveat is doing real work…
Follow-up: Dead volume across syringe and needle combinations Replied, post #87 · Devices › Syringes & needles · 23 Dec 2024 · 28 likes Post #86 and I disagree about the size of the effect, not about the direction. A detachable luer needle plus hub can retain enough volume to matter. Whether it matters…
Injection-site reactions: describing them precisely enough to be useful Replied, post #58 · Practice › Side effects · 9 Dec 2024 · 1 like 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…
Telehealth prescribing models in the US Replied, post #30 · Regional › North America · 5 Dec 2024 · 0 likes Taking post #29 at face value and following it one step further. Genuine question rather than a rhetorical one: has anyone here actually observed telehealth prescribing…
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 Understood. Thank you for being specific about the limits of it.
Hypertension improvement and when medication needs revisiting — a second dataset Replied, post #82 · Clinical › Comorbidities · 22 Oct 2024 · 18 likes I had written a reply contradicting post #78 and deleted it. Here is what survived. Adding a small correction to the Hypertension improvement summary above rather than…
Progressive overload when the scale is falling — one year on Replied, post #155 · Nutrition & Training › Resistance training · 13 Oct 2024 · 6 likes If you are new and reading this thread for the answer to Progressive overload: the answer is conditional, the conditions are in the third reply, and the rest of the…
Taste changes and food aversion, reported and discussed Replied, post #16 · Practice › Side effects · 4 Sep 2024 · 2 likes Post #13 answers the question as asked. The question underneath it is different. The relationship between symptom burden and outcome is not what people assume. Feeling…
Coming back to: Renal impairment: what the labelling says about dose Replied, post #2 · Clinical › Special populations · 1 Sep 2024 · 0 likes I came in to disagree and I am leaving without a disagreement.
The mass-error checker and its intended scope Replied, post #40 · Data & Tools › Calculators · 10 Jun 2024 · 10 likes A calculator that shows its working is worth ten that give an answer. The whole value is being able to see which step you disagree with.