How a claim degrades between the bench and the listing
A badge asserts that something was tested. It does not assert what, when, on whose sample, by what method, or whether the lot on sale is the lot that was tested.
Archive — February 2025
Page 3 of 5 of this archive, newest first.
What the GLP-1 receptor actually does when tirzepatide binds it
The class is described as though every molecule in it did the same thing. At the receptor, they demonstrably do not.
What the new the United Kingdom guidance says about stopping
The evidence base is thin and the document says so, which is to its credit.
Nantong export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
Independent analysis puts a SGN liraglutide lot at 97.4%, against 93.3% on the certificate
A reminder that a purity figure is the output of a method, and that methods differ.
The quiet end of Calder Vale Peptides of Skipton
A proper account of an operation that existed, and of what closing it cost.
A shortage listing ends. 24 pharmacies now have a business model and no legal basis for it.
The document is four pages. Three of them are about dates.
Side effects, cost, supply, target: four reasons with four trajectories
Why the reason for stopping changes what happens afterwards.
A few hundred participants carry the whole body-composition argument
A substudy powered to describe a mean is not a substudy powered to detect a clinically meaningful individual change.
Inspectors cite the relabeller trading as Vantris Bio over sterility assurance
The observation that closes a facility is rarely the dramatic one.
What a 13% rise in coupling-reagent prices does to a 10 mg vial
Follow the resin, not the catalogue.
PeptideMeter result on a Zhuhai mazdutide lot lands 2.7 points below the supplier’s figure
The result is unremarkable. What the report omits is not.
Calder Vale Peptides of Skipton closes after 6 years
A proper account of an operation that existed, and of what closing it cost.
The reference change value: the number that tells you whether a delta is real
A flag is a probability statement about a population. It is not a statement about the person holding the printout.
Two documents, two disciplines: purity and sterility are not the same trade
Every certificate circulating in this market answers a question about molecules. Almost none answers a question about organisms, pyrogens, or the integrity of the seal.
Maximum tolerated is not maximum approved
A plateau at an intermediate dose and a plateau at the maximum dose look identical from the outside and mean different things.
The slide that was not in the abstract
Reported from the sessions, and from the two hours afterwards.
Independent analysis puts a CPC dulaglutide lot at 95.9%, against 94.7% on the certificate
The supplier has not disputed the finding. It has not explained the gap either.
TRIUMPH-3 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 Germany guidance says about stopping
The evidence base is thin and the document says so, which is to its credit.
The degradation product that elutes underneath the parent peak
An isoaspartate rearrangement changes the molecule and not the mass. A method that confirms identity by molecular weight alone will report it as the parent compound.
Which results are findings and which are consequences of the weight loss
Three different explanations for the same abnormal number, and how to tell them apart.
The consolidator trading as Meridian Freight Partners closes after 12 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 40% rise in coupling-reagent prices does to a 30 mg vial
Follow the resin, not the catalogue.
A shortage listing ends. 7 pharmacies now have a business model and no legal basis for it.
The document is four pages. Three of them are about dates.
The badge economy, and what it is actually certifying
What a verification mark would have to carry to be checkable: a date, a lot, a method, a submitter and a link to the report.
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 problem.
What a month without the drug does to tolerability
The convention — resume lower, re-escalate — is not caution. It follows directly from the elimination half-life.
New Zealand declines to reimburse liraglutide outside a specialist service
Efficacy was never the question in this appraisal. Duration of treatment was.
The relabeller trading as Vantris Bio closes after 6 years
A proper account of an operation that existed, and of what closing it cost.
Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.
The 13-day notice: how a compounding wind-down works in India
The document is four pages. Three of them are about dates.
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.
PeptideMeter result on a Tianjin semaglutide lot lands 1.1 points below the supplier’s figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
The slide that was not in the abstract
Reported from the sessions, and from the two hours afterwards.
A supplier suspends shipping to New Zealand after 12 consecutive customs detentions
The route did not close because of a rule about peptides.
Zhuhai export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
Why your laboratory interval differs from the one in the textbook
Two sources of noise sit under every number: how reproducible the assay is, and how much the analyte varies within the same person on the same day.
An interlaboratory comparison nobody had run
Duplicate submissions under different names test within-laboratory repeatability, which is a different quantity from between-laboratory reproducibility.