Every letter we have printed
Roughly a thousand readers write to the Journal each month. This is the archive of what has been printed: the writer’s initial, surname and city, verified before publication, and the desk’s reply where a reply was owed. Factual challenges are routed to the standards editor before anything else happens to them.
On “In-use periods, and the ones nobody can give you” — Patient Notes, 28 Jun 2026
As a practice nurse I would add the ten-second hold to your list of things people skip. I watch patients withdraw immediately and then wonder about the wet patch on their skin. It is the most visible underdose there is and almost nobody connects the two.
— D. Ó Súilleabháin, Killarney
Well observed, and now in the priming section and the sidebar. The wet skin is exactly the useful feedback signal — unlike most of the errors in this file, this one announces itself, and the announcement is being misread.
On “In-use periods, and the ones nobody can give you” — Patient Notes, 28 Jun 2026
The section on in-use stability is unhelpfully agnostic. Everyone in this market uses a figure of around thirty days refrigerated. Surely you can say whether that is roughly right rather than declining to comment.
— K. Mwangi, Nakuru
We can say where it comes from, which is the in-use period established for licensed pen presentations of specific formulations in specific containers. Whether it transfers to a different peptide reconstituted in a different diluent in a different vial is not something the stability literature permits anyone to assert. Declining to guess is not agnosticism; it is the difference between a study and a convention.
On “In-use periods, and the ones nobody can give you” — Patient Notes, 28 Jun 2026
You recommend writing the concentration on the vial. I would add: write it on the box as well. My vial label came off in the fridge and I lost the only record of what diluent volume I had used.
— R. Cadogan, Bridgetown
On “The named comparison we promised two years ago” — The Ledger, 28 Jun 2026
Your selection-effect model assumes a supplier publishes results above a fixed threshold. Real behaviour is surely more complicated: a supplier might publish a poor result on a batch it has withdrawn, or publish everything for a period to establish credibility and then stop. The arithmetic is fine and the behavioural assumption is a cartoon.
— D. Ferreira-Lopes, Porto
Agreed, and the figure caption now says illustrative arithmetic rather than model. The point survives the simplification, which is that a small amount of selection produces a large apparent effect, but we should not have dressed a demonstration as an estimate.
On “SURMOUNT-4 was built to answer the stopping question, and it did” — Clinical Trials, 27 Jun 2026
You describe the maintenance strategy of stepping down one dose and holding for eight to twelve weeks as something clinicians report doing, and then say it is not a recommendation. That distinction will be lost on most readers, and printing the protocol makes you a source for it whether you intend to be or not.
— E. Vandenberghe, Ghent
This is the hardest editorial question this department faces and we do not think you are wrong. Our position is that a practice this widespread is better described accurately, with its evidentiary status stated, than left to circulate in fragments. We accept that the distinction does work that a reader may not do.
On “SURMOUNT-4 was built to answer the stopping question, and it did” — Clinical Trials, 27 Jun 2026
I stopped eight months ago after reaching a weight I was happy with, and I have regained four of the twenty-two kilograms I lost. Every article I read told me to expect two-thirds back. I am not complaining, but I would like to know whether I am unusual or whether the two-thirds figure was always a mean concealing an enormous range.
— H. Okwuosa, Enugu
The second. The published interquartile ranges around those means are wide, and outcomes like yours are well within them. The trials were not designed to explain why some people hold weight after cessation and others do not, and nothing measured at randomisation predicts it usefully. You are not an anomaly; you are part of a distribution nobody quotes.
On “SURMOUNT-4 was built to answer the stopping question, and it did” — Clinical Trials, 27 Jun 2026
Your piece describes tapering as pharmacologically pointless and then spends three paragraphs making a case for it. Pick one.
— S. Tovmasyan, Gyumri
Both, we think, and deliberately. There is no pharmacological rationale, because there is no withdrawal syndrome and a week-long half-life produces its own decline. There is a behavioural rationale, which is different in kind and untested. Our objection is to tapers advocated in pharmacological language, not to the practice.
On “SURMOUNT-4 was built to answer the stopping question, and it did” — Clinical Trials, 27 Jun 2026
I lost access for eleven weeks during the shortage, restarted at the dose I had been on because nobody told me otherwise, and spent a fortnight unable to keep food down. I had been on that dose for seven months without difficulty. Reading your resumption section was the first time anybody explained it.
— N. Bujanović, Sarajevo
It is entirely predictable from the label and the pharmacokinetics, and the failure to communicate it during the shortage period was systemic rather than individual. We are sorry it reached you this way and we are glad it reached you.
On “SURMOUNT-4 was built to answer the stopping question, and it did” — Clinical Trials, 27 Jun 2026
The claim that stopping does not leave you worse off than baseline is a group-level claim about trial arms. Individuals can and do overshoot. Your phrasing invites readers to conclude otherwise.
— L. Kowalski, Gdańsk
Correct, and the distinction matters. We have added a clause: no arm overshot at a group level, which is not the same as no participant overshooting. The trials do not report individual overshoot rates and we have not found them published anywhere.
On “Set the threshold at a tenth of a per cent and the small impurities vanish” — Analytics, 27 Jun 2026
On the section about diode-array detection and peak purity, I would add that true peak purity assessment requires library matching or at least spectral comparison across the peak width. A homogeneous spectrum tells you the peak is probably pure. A spectrum that shifts across the peak tells you it is not, and that information closes a gap the article identifies correctly.
— P. Kovalenko, Lviv
On “Maintenance dosing: what is licensed, what is practised, and what is evidenced” — Clinical Trials, 26 Jun 2026
I lost access for eleven weeks during the shortage, restarted at the dose I had been on because nobody told me otherwise, and spent a fortnight unable to keep food down. I had been on that dose for seven months without difficulty. Reading your resumption section was the first time anybody explained it.
— G. Kalinowski, Poznań
It is entirely predictable from the label and the pharmacokinetics, and the failure to communicate it during the shortage period was systemic rather than individual. We are sorry it reached you this way and we are glad it reached you.
On “Maintenance dosing: what is licensed, what is practised, and what is evidenced” — Clinical Trials, 26 Jun 2026
Your piece describes tapering as pharmacologically pointless and then spends three paragraphs making a case for it. Pick one.
— E. Adamou, Nicosia
Both, we think, and deliberately. There is no pharmacological rationale, because there is no withdrawal syndrome and a week-long half-life produces its own decline. There is a behavioural rationale, which is different in kind and untested. Our objection is to tapers advocated in pharmacological language, not to the practice.
On “Maintenance dosing: what is licensed, what is practised, and what is evidenced” — Clinical Trials, 26 Jun 2026
I stopped eight months ago after reaching a weight I was happy with, and I have regained four of the twenty-two kilograms I lost. Every article I read told me to expect two-thirds back. I am not complaining, but I would like to know whether I am unusual or whether the two-thirds figure was always a mean concealing an enormous range.
— S. Grootveld, Rotterdam
The second. The published interquartile ranges around those means are wide, and outcomes like yours are well within them. The trials were not designed to explain why some people hold weight after cessation and others do not, and nothing measured at randomisation predicts it usefully. You are not an anomaly; you are part of a distribution nobody quotes.
On “Same material, different gradients, different answers” — The Supply Chain, 25 Jun 2026
You note that no service offers sterility testing and that it takes fourteen days. Worth saying more plainly: a purity certificate and a sterility assurance are not merely different tests, they are different disciplines with different facilities, and no amount of chromatography will ever bear on it.
— J. Delahunty, Waterford
Correct and worth the emphasis. We have said it in the certificates piece and should say it here too: nothing any of these four services sells addresses sterility, endotoxin or container closure integrity, and no combination of their reports adds up to one.
On “Same material, different gradients, different answers” — The Supply Chain, 25 Jun 2026
The price table is the most useful thing you have published this year and also the thing most likely to be quoted out of context by somebody selling a comparison service. You might consider a note.
— P. Sarkissian, Beirut
There is one, and we have strengthened it. The figures are what this publication was invoiced at list rates and are not quotations a reader should expect; volume submitters pay materially less.
On “Two sessions a week, and the evidence behind the prescription” — Laboratory Notebook, 24 Jun 2026
The soft-tissue artefact point in your bone section is underplayed. In a patient losing twenty per cent of body mass the change in overlying tissue is well outside the range the calibration was validated over, and the published analyses do not report a sensitivity analysis for it. That is not a caveat, it is a gap.
— P. Sarkissian, Beirut
We accept the escalation and have strengthened the wording. The absence of any published sensitivity analysis is, as you say, the more damaging observation.
On “Two sessions a week, and the evidence behind the prescription” — Laboratory Notebook, 24 Jun 2026
My mother is eighty-one and on a low dose for her diabetes. Her weight is down nine kilograms and she now struggles to get out of a low chair, which she did not eighteen months ago. Nobody has measured anything. I do not know whether this is the drug, the weight loss, or being eighty-one, and neither does anybody I have asked.
— J. Delahunty, Waterford
That is the situation the missing endpoint produces, and we are sorry to have no better answer. A chair-stand time takes thirty seconds to measure and would at least establish a baseline against which the next six months could be judged. It is worth asking for by name.
On “Two sessions a week, and the evidence behind the prescription” — Laboratory Notebook, 24 Jun 2026
I have read your protein tables twice and I still cannot work out what I should eat. I appreciate that this is the honest position but it is not a useful one for a person in a supermarket.
— N. Prasetyo, Surabaya
It is a fair complaint about a real limitation. What we can say is that the defensible range is narrower than the disagreement suggests, that the denominator matters more than the ratio, and that a clinician or dietitian can convert a range into a number for your body in a way that a magazine cannot.
On “The ceiling is a tolerability finding, not an efficacy one” — Patient Notes, 23 Jun 2026
I had a nine-week gap last year because my supplier stopped answering messages. Nobody in any clinical setting I dealt with treated that as a pharmacological event. Your framing of supply interruption as a dosing decision is the first time I have seen it written down.
— C. Bąkowski, Łódź
On “SURPASS-2 was built to answer the stopping question, and it did” — The Ledger, 23 Jun 2026
The claim that stopping does not leave you worse off than baseline is a group-level claim about trial arms. Individuals can and do overshoot. Your phrasing invites readers to conclude otherwise.
— A. Mbeki, Lusaka
Correct, and the distinction matters. We have added a clause: no arm overshot at a group level, which is not the same as no participant overshooting. The trials do not report individual overshoot rates and we have not found them published anywhere.
On “SURPASS-2 was built to answer the stopping question, and it did” — The Ledger, 23 Jun 2026
I take this for kidney disease, not for weight. Every piece of writing I encounter about stopping is about the weight coming back. It has taken me a year to find anybody willing to say plainly that the renal benefit accrued over years of treatment and nobody has tested what happens if I stop.
— D. Mazzarella, Catania
On “SURPASS-2 was built to answer the stopping question, and it did” — The Ledger, 23 Jun 2026
Your fortnightly arithmetic table is correct but I think it understates the practical point. A fourfold peak-to-trough swing is not merely lower average exposure; it is a different drug experience, with the last few days of each cycle spent at a concentration the person has effectively titrated off.
— C. Rautenbach, Pretoria
Well put, and better than our own phrasing. We have adopted the point in the text with attribution to a reader.
On “SURPASS-2 was built to answer the stopping question, and it did” — The Ledger, 23 Jun 2026
Three months after stopping, my HbA1c had barely moved and I concluded I had got away with it. Six months after stopping, it was back where it started. Your point about the lag is the single most useful sentence I have read on this subject.
— R. Whitlam, Adelaide, SA
On “SURPASS-2 was built to answer the stopping question, and it did” — The Ledger, 23 Jun 2026
You describe the maintenance strategy of stepping down one dose and holding for eight to twelve weeks as something clinicians report doing, and then say it is not a recommendation. That distinction will be lost on most readers, and printing the protocol makes you a source for it whether you intend to be or not.
— P. Kovalenko, Lviv
This is the hardest editorial question this department faces and we do not think you are wrong. Our position is that a practice this widespread is better described accurately, with its evidentiary status stated, than left to circulate in fragments. We accept that the distinction does work that a reader may not do.
On “What the trials counted as intolerance” — Pharmacology, 22 Jun 2026
Nothing in your file addresses the social dimension, which for me was worse than the nausea. Six months of declining invitations to meals, and explaining to family why I was not eating. The tables do not have a row for that.
— J. Halloway, Dundee
On “What the trials counted as intolerance” — Pharmacology, 22 Jun 2026
A small point of precision. You use "gastroparesis" in the tag list and then spend a paragraph saying it is not a synonym for drug-induced emptying delay. That is a slightly awkward position to hold.
— K. Oyibo, Benin City
It is, and it is a compromise with how readers search. The tag exists because that is the word people use; the glossary exists because it is the wrong one. We would rather be findable and then precise than precise and unread.
On “Twelve things a real certificate has, and what their absence means” — Analytics, 22 Jun 2026
The composite test table you print as a model is unrealistic. No research supplier is going to run headspace GC and ion chromatography on every lot at these price points, and publishing an aspirational document as a benchmark just makes real certificates look worse than they are.
— N. Prasetyo, Surabaya
The table note says explicitly that no supplier in our programme issues a document containing every row, and it is offered as a reference rather than as a demand. But you have a point about framing, and we have moved the caveat from the note into the caption.
On “Twelve things a real certificate has, and what their absence means” — Analytics, 22 Jun 2026
Nine years buying research chemicals and I had never once looked at the date of manufacture. I checked eleven certificates in my drawer this evening. Four do not carry one.
— V. Bhattarai, Kathmandu
On “Twelve things a real certificate has, and what their absence means” — Analytics, 22 Jun 2026
I have a certificate with an expiry date twenty-four months from manufacture and no stability data behind it, which your article says is a claim the documentation cannot support. The supplier tells me it is industry standard. Is it?
— P. Sarkissian, Beirut
Twenty-four months is a common default and “industry standard” is an accurate description of the practice rather than a justification of the claim. The distinction we would press is between an expiry date, which asserts shelf life, and a retest date, which asserts only a review interval. The second is defensible without stability data. The first is not.
On “What the anaesthetists said, and then said again” — Explainers, 20 Jun 2026
I want to push back on the ginger paragraph. You describe the evidence as transferred from pregnancy and chemotherapy, which is accurate, and then include it in the table anyway. Either it belongs or it does not.
— R. Whitlam, Adelaide, SA
It belongs, labelled. The table is a map of what is recommended and on what basis, not a list of endorsements, and excluding widely used low-risk measures because their evidence is transferred would make the map less useful rather than more honest. We have made the column heading clearer.
On “The restart nobody plans for” — Explainers, 20 Jun 2026
Thank you for saying plainly that the maximum dose is not the goal. I stopped at 10 mg fourteen months ago because it was working and I was tired of arguing about it. Every article I read before yours implied I had given up early.
— S. Weatherall, Newcastle, NSW
On “The restart nobody plans for” — Explainers, 20 Jun 2026
I want to object to the framing of dose reduction as measurement. In practice it is experienced as failure, and telling people it is a thermostat does not change how the appointment feels. The language problem is real and you have solved it rhetorically rather than actually.
— T. Aoyama, Nagoya
A fair hit. We can describe the pharmacology accurately and still be writing at a distance from how the decision lands, and the paragraph you object to does both. The reframing is offered as a corrective to a stigma, not as a claim that the stigma is imaginary.
On “The restart nobody plans for” — Explainers, 20 Jun 2026
Your residual-exposure table gives six per cent after four weeks. I calculate 6.25 per cent, which is a quibble, but the larger point is that it assumes steady state at the moment of interruption. Someone who stops three weeks into a new rung has less on board than your table implies.
— P. Sandoval, Albuquerque, NM
Correct on both counts, and the table now carries the steady-state assumption explicitly. Your second point is the more useful one: interrupting mid-escalation clears faster than interrupting from a settled dose, and the practical reading of the table should be adjusted accordingly.
On “The restart nobody plans for” — Explainers, 20 Jun 2026
As a prescribing pharmacist I would add one thing about re-titration. The commonest problem I see is not the resumption dose. It is that the patient has a pen left over at the old strength and uses it because it is in the fridge and it cost money. The clinical decision and the economic decision are not the same decision.
— Q. Delacroix, Montréal, QC
Well put, and we had not written it down. The cost of discarding partially used material is a real input into dosing behaviour in a market where much of the spend is out of pocket, and it deserves treatment in The Ledger rather than a sentence here.
On “The dose that got you here and the dose that keeps you here” — The Ledger, 19 Jun 2026
I take this for kidney disease, not for weight. Every piece of writing I encounter about stopping is about the weight coming back. It has taken me a year to find anybody willing to say plainly that the renal benefit accrued over years of treatment and nobody has tested what happens if I stop.
— D. Ramkissoon, Port of Spain
On “The dose that got you here and the dose that keeps you here” — The Ledger, 19 Jun 2026
The claim that stopping does not leave you worse off than baseline is a group-level claim about trial arms. Individuals can and do overshoot. Your phrasing invites readers to conclude otherwise.
— P. Kovalenko, Lviv
Correct, and the distinction matters. We have added a clause: no arm overshot at a group level, which is not the same as no participant overshooting. The trials do not report individual overshoot rates and we have not found them published anywhere.
On “The dose that got you here and the dose that keeps you here” — The Ledger, 19 Jun 2026
Three months after stopping, my HbA1c had barely moved and I concluded I had got away with it. Six months after stopping, it was back where it started. Your point about the lag is the single most useful sentence I have read on this subject.
— C. Adeoti, Ibadan
On “The imaging substudy is an afterthought in the protocol and the centrepiece…” — Laboratory Notebook, 19 Jun 2026
Your piece treats the one-quarter rule as discredited and then quotes fractions of one third and two fifths from the substudies as though those were more solid. They are group means from a hundred and forty people. Physician, heal thyself.
— N. Ó Broin, Sligo
A fair hit, and we have amended the paragraph to carry the same caveat in both places. The distinction we should have drawn is that the substudy figures are at least attached to a stated population and a stated instrument, which the textbook rule is not. Neither is a constant.
On “The imaging substudy is an afterthought in the protocol and the centrepiece…” — Laboratory Notebook, 19 Jun 2026
I train four times a week, eat a hundred and sixty grams of protein and my appendicular lean mass has fallen by 1.8 kg over ten months while every lift has gone up. Your section on mass against function was the first thing I have read that made that seem normal rather than a failure.
— F. Duquesne, Lyon
On “The imaging substudy is an afterthought in the protocol and the centrepiece…” — Laboratory Notebook, 19 Jun 2026
As a DXA technologist of twenty-two years I would add one thing to your precision section: the largest source of error in practice is not the machine, it is positioning. A patient scanned with their arms two centimetres further from their trunk will report different regional values. We are trained to a protocol and the protocol is not always followed.
— S. Nortje, Stellenbosch
We should have said this and did not. It also argues for what you presumably practise: same device, same technologist, same protocol, and a note in the record when any of those changes.