A supplier suspends shipping to Poland after 14 consecutive customs detentions
The route did not close because of a rule about peptides.
Editor’s letter
Something changed in this trade over the last two years that nobody announced: the documents got better. Not universally, not quickly, and not because anybody required it. But certificates that carried a percentage and a signature in 2024 now carry a method, a wavelength and, in two cases, an integration threshold. We did not cause that. We did notice it, which is the job.
In this number, 60 pieces across 8 departments, with 110 further dispatches filed from the newsroom and 29 contributors on the page. We lead with Félix Oyarzún on A result on one vial generalises to a batch only if the vial was drawn in a way that makes it representative — and nobody records how it was drawn and set beside it Jonas Arvelo in Clinical Trials. Part 16 of The Purity Question continues on the inside pages.
I want to record something about the vendor dossier programme, because readers occasionally read it as a consumer guide and it is not one. Its purpose is documentary: to establish, quarter by quarter, what each company will confirm in writing and what it will not, and to publish the count. A dossier is a record of a conversation, and the silences in it are as informative as the answers.
To the reader who wrote in April asking us to be less cautious: we have thought about it, and the caution is load-bearing. It is what allows the confident sentences to be confident.
Contents
60 piecesPharmacology
7Holding the dose before surgery: for whom, for how long
The evidence is real, modest, and mostly retrospective. The guidance is correspondingly cautious and has been revised toward…
Anneke van der Molen
1351 words
What STEP 4 and SURMOUNT-4 actually established
A plateau at an intermediate dose and a plateau at the maximum dose look identical from the outside and mean different things.
Salomé Adeyemi
2000 words
Do you need the top of the ladder?
The dose-response curve in this class flattens near its top. That has direct consequences for whether the final rung is worth…
Salomé Adeyemi
1520 words
The tolerability data everybody quotes and nobody reads
Trial adverse-event tables count episodes reported to a study nurse. They are the best data we have and they systematically…
Anneke van der Molen
1470 words
Amylin is not an incretin, and cagrilintide is not a GLP-1 agonist
The glucagon arm raises energy expenditure and also raises hepatic glucose output. Balancing those is the whole engineering…
Delphine Ruzek
1303 words
What actually helps, ranked by evidence
The intervention with the clearest evidence is the one nobody frames as an intervention: adjusting the dose.
Yuki Morishita
1310 words
Where the receptor is: a tissue-by-tissue account of tirzepatide’s reach
The same receptor population that produces the therapeutic effect produces the commonest adverse one.
Marguerite Vasseur
1009 words
The Supply Chain
8Reproducibility, measured rather than assumed
The Journal submitted split samples from single lots to three assay services, under names unconnected to this publication, and…
Noor Haddadin
2108 words
How far back does this document actually reach?
The interval between manufacture and analysis is the most under-read figure on the page, and the one most likely to matter by…
Orla McCaffrey
2772 words
The batch number is the only thing connecting the page to the vial
The interval between manufacture and analysis is the most under-read figure on the page, and the one most likely to matter by…
Mei-Lin Tsou
1549 words
What twenty companies say about storage, and what they have measured
A retest date says that material should be re-examined before use. An expiry date says it should not be used. The trade uses the…
Roshan Devakumar
1820 words
The fourteen-day problem, and what it does to a commercial testing model
The absence of microbiological capability in this market is a commercial fact with a straightforward explanation, and it is…
Inés Abernathy
1545 words
The submitted sample: the weakest link in the whole system
A result on one vial generalises to a batch only if the vial was drawn in a way that makes it representative — and nobody…
Evander Sittig
1628 words
A certificate is a snapshot, and peptides do not stand still
A document is only as good as the chain that connects it to the material, and most chains here are two or three links longer…
Orla McCaffrey
2701 words
Custody, condition and the temperature nobody logged
Every third-party report in this market describes a sample somebody chose to send. That choice is outside the laboratory’s…
Evander Sittig
1848 words
Clinical Trials
8What the placebo arms of the withdrawal trials actually tell us
What was withdrawn, from whom, after how long, and what was measured afterwards.
Jonas Arvelo
1454 words
Why the bone question is harder than the muscle question
What the Journal would want measured before treating this as settled in either direction.
Jonas Arvelo
2353 words
Stepping down against stopping: two decisions treated as one
These agents produce no dependence and no withdrawal syndrome. What a taper would be for is therefore a real question rather…
Marguerite Vasseur
1693 words
A guide to the results that will resolve themselves
Three different explanations for the same abnormal number, and how to tell them apart.
Jonas Arvelo
1373 words
Weight regain is not a failure of willpower and it is not a mystery
Regain begins immediately, proceeds at a decelerating rate, and does not usually return to baseline within the observed…
Marguerite Vasseur
1889 words
Every fortnight, every third week, seasonally: an unstudied practice
An absence of evidence is not evidence of harm. It is also not a licence.
Jonas Arvelo
1332 words
Stepping down against stopping: two decisions treated as one
The best argument for tapering is behavioural rather than pharmacological, and it deserves to be made on its own terms.
Anneke van der Molen
2839 words
What STEP 4 tells us about maintenance, and what it does not
A survey of the maintenance evidence, which is shorter than the survey of the withdrawal evidence.
Yuki Morishita
1486 words
Analytics
9Custody, condition and the temperature nobody logged
A result on one vial generalises to a batch only if the vial was drawn in a way that makes it representative — and nobody…
Félix Oyarzún
2524 words
Why a result on one vial says less than the trade needs it to
Every third-party report in this market describes a sample somebody chose to send. That choice is outside the laboratory’s…
Nikolaj Brandvold
1597 words
Why a 0.036-dalton difference is the hardest number in peptide identity
Every instrument specification quoted in an advertisement is a best case obtained on a calibration mixture, not on a submitted…
Harriet Oduya
2126 words
Freezing a reconstituted vial: the ice-water interface problem
We set out what is known, what is inferred and what is simply assumed about the fortnight after a vial is opened.
Callum Brathwaite
1585 words
Peptide content is the number that tells you how much drug is in the vial. Almost nobody sells it, almost nobody buys it, and…
Callum Brathwaite
1176 words
The certificate of analysis, line by line
The purity figure is the least informative line on a well-constructed certificate and the only line most buyers read.
Nikolaj Brandvold
1549 words
Before anything is weighed, the peptide has to be charged
A brief and unromantic tour of the interface between a liquid sample and a vacuum.
Roshan Devakumar
3116 words
The question no chromatogram has ever answered
The Journal has read several hundred certificates from twenty companies. We set out what the documents actually cover, and what…
Félix Oyarzún
1506 words
The badge is about a sample. The listing is about a product.
Every step between the laboratory report and the product page removes information, and the badge is the last step.
Nikolaj Brandvold
1727 words
Patient Notes
7The dose that got you here and the dose that keeps you here
What the labels permit, what clinicians do, and the size of the gap between them.
Perpetua Nwachukwu
1883 words
The advice is mostly reasonable. The certainty is not earned.
A tour of the source literatures, with an assessment of how far each legitimately reaches.
Héctor Valmorida
1893 words
Four millimetres is enough, and the data says so
A 4 mm needle at ninety degrees without a skin pinch is adequate for essentially all adults. The persistence of 12.7 mm needles…
Tamsin Okonjo
1707 words
Which results are findings and which are consequences of the weight loss
The panel drawn during a week of vomiting is measuring the vomiting.
Tamsin Okonjo
1444 words
Target dose, effective dose, and the distance between them
The dose-response curve in this class flattens near its top. That has direct consequences for whether the final rung is worth…
Salomé Adeyemi
2121 words
The substudies, read properly: who was scanned, when, and with what
Both the reassuring reading and the alarming reading are supportable from the same tables. This piece sets out which is which.
Delphine Ruzek
1863 words
The lowest effective dose is a real concept with almost no data behind it
Dose reduction is not withdrawal, and the trials that tested withdrawal cannot be read as testing it.
Priya Ramanathan, PharmD
1688 words
The Ledger
7The named comparison we promised two years ago
The Journal submitted split samples from single lots to three assay services, under names unconnected to this publication, and…
Sunniva Ørstavik
1785 words
Why people actually stop, in the order they actually stop
Real-world persistence figures, with their definitions stated, because the definitions are doing most of the work.
Teodor Lindqvist
1804 words
The badge economy, and what it is actually certifying
Every step between the laboratory report and the product page removes information, and the badge is the last step.
Ruslan Yevtushenko
1531 words
The lead-in, the randomisation, and the year that followed
The regain trajectories, arm by arm, with the estimands named.
Harriet Oduya
2532 words
Why a result on one vial says less than the trade needs it to
The condition on arrival is recorded by some services and not others, and it is one of the more informative lines in a report.
Ruslan Yevtushenko
2096 words
The dose that got you here and the dose that keeps you here
The commonest real-world strategy in this drug class is the least studied one.
Harriet Oduya
1641 words
A tested vial is evidence about a vial
The condition on arrival is recorded by some services and not others, and it is one of the more informative lines in a report.
Noor Haddadin
2090 words
Laboratory Notebook
7What Sweden customs does to a parcel it has decided to examine
A gel pack has a finite thermal budget, and once it is spent the payload equilibrates with whatever is outside the box. The only…
Nikolaj Brandvold
1764 words
What “LC-MS: conforms” tells a reader, which is almost nothing
What the Journal asks for when it writes to a supplier about an identity claim, and how often it gets it.
Perpetua Nwachukwu
2016 words
What the trials monitored, and what that implies about routine practice
Timing is the whole of the post-cessation panel: draw it too early and it measures the treatment period.
Félix Oyarzún
1440 words
What the trials monitored, and what that implies about routine practice
Timing is the whole of the post-cessation panel: draw it too early and it measures the treatment period.
Félix Oyarzún
2583 words
Quadrupole, time-of-flight, orbital trap: what each class can and cannot see
Every instrument specification quoted in an advertisement is a best case obtained on a calibration mixture, not on a submitted…
Nikolaj Brandvold
1663 words
Peak capacity, and the honest measure of a separation
Column chemistry, particle size and pore diameter determine what the separation is capable of before the gradient is even…
Félix Oyarzún
1778 words
What the four services actually offer, test by test
We asked all four services what they can determine, on what timescale, at what price, and under what accreditation. The answers…
Félix Oyarzún
1636 words
Explainers
7How much water: the question with no single right answer
A more concentrated reconstitution means smaller injection volumes, which means larger proportional errors from graduation, dead…
Priya Ramanathan, PharmD
1804 words
Accumulation, trough, and the exposure curve nobody draws for patients
An accumulation model, drawn from published parameters, with its assumptions stated.
Marguerite Vasseur
1079 words
Where the receptor is: a tissue-by-tissue account of tirzepatide’s reach
The same receptor population that produces the therapeutic effect produces the commonest adverse one.
Priya Ramanathan, PharmD
1130 words
From cell to clinic: where the extrapolation stops being safe
Receptor pharmacology is strong on average effects and almost silent on individual variation. That gap is where most reader…
Priya Ramanathan, PharmD
2105 words
Twelve minutes or forty: what gradient slope buys
A shallow gradient resolves impurities that a steep one runs into the parent peak. Both methods are legitimate; only one of them…
Delphine Ruzek
1726 words
The insulin injection-technique literature is large, well conducted and directly transferable on questions of depth and tissue.…
Héctor Valmorida
1493 words
Gallstones during rapid weight loss: drug, or weight loss?
Pancreatitis is rare, was adjudicated in the outcome programmes, and did not show the imbalance early case reports suggested.
Priya Ramanathan, PharmD
1337 words
Contributors to this issue
Also filed
the rolling newsroom, September 2024What a 20% rise in coupling-reagent prices does to a 5 mg vial
Follow the resin, not the catalogue.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
The 27-day notice: how a compounding wind-down works in South Korea
The document is four pages. Three of them are about dates.
Guangzhou export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
Independent analysis puts a WXT tirzepatide lot at 96.4%, against 93.6% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
The relabeller trading as Vantris Bio enters a consent decree and stops sterile preparation
The observation that closes a facility is rarely the dramatic one.
VendorInvestigate result on a Wuxi semaglutide lot lands 2.1 points below the supplier’s figure
The supplier has not disputed the finding. It has not explained the gap either.
What changed at BCH in September, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Janoshik result on a Wuxi survodutide lot lands 2.9 points below the supplier’s figure
The supplier has not disputed the finding. It has not explained the gap either.
From the floor in Suzhou: 6 posters, one theme
Reported from the sessions, and from the two hours afterwards.
Independent analysis puts a BCH mazdutide lot at 98.6%, against 96.0% on the certificate
The supplier has not disputed the finding. It has not explained the gap either.
The slide that was not in the abstract
Reported from the sessions, and from the two hours afterwards.
Nigeria pharmacy body issues counselling standards for exenatide initiation
The evidence base is thin and the document says so, which is to its credit.
What changed at HJ in September, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
From the floor in Shenzhen: 5 posters, one theme
Reported from the sessions, and from the two hours afterwards.
Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.
GGPeps declines, for the 15th time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
The 17-day notice: how a compounding wind-down works in the United Kingdom
The document is four pages. Three of them are about dates.
Halvard & Pike Apothecary of Portland, Maine closes after 4 years
A proper account of an operation that existed, and of what closing it cost.
What a 33% rise in coupling-reagent prices does to a 2 mg vial
Follow the resin, not the catalogue.
VendorInvestigate result on a Guangzhou liraglutide lot lands 3.6 points below the supplier’s figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
A shortage listing ends. 16 pharmacies now have a business model and no legal basis for it.
The document is four pages. Three of them are about dates.
The slide that was not in the abstract
Reported from the sessions, and from the two hours afterwards.
Nigeria health authority warns on falsified dulaglutide pens
Reported from the analysis, not from a warning notice.
TRIUMPH-1 misses on a secondary endpoint the coverage has not mentioned
A design note rather than a result: what the comparator was, and what that permits you to conclude.
What the new Nigeria guidance says about stopping
The evidence base is thin and the document says so, which is to its credit.
The consolidator trading as Meridian Freight Partners closes after 15 years
A proper account of an operation that existed, and of what closing it cost.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
What a 16% rise in coupling-reagent prices does to a 5 mg vial
Follow the resin, not the catalogue.