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.
The archive — 2025
Page 61 of 68 of this archive, newest first.
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.
Xi'an export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
Inspectors cite the online reseller trading as Adamant Research Supply over sterility assurance
The observation that closes a facility is rarely the dramatic one.
The 31-day notice: how a compounding wind-down works in Argentina
The document is four pages. Three of them are about dates.
What changed at SSA in February, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
The precision question nobody puts to a body-composition report
A body-composition report gives four decimal places and no confidence interval. That is the whole difficulty in one sentence.
What the protein literature actually shows, and in whom it was shown
The denominator matters more than the ratio: per kilogram of body weight, of ideal weight, or of lean mass gives three different targets.
Reproducibility, measured rather than assumed
Duplicate submissions under different names test within-laboratory repeatability, which is a different quantity from between-laboratory reproducibility.
What an 11% rise in coupling-reagent prices does to a 2 mg vial
Follow the resin, not the catalogue.
Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.
From the floor in Nantong: 18 posters, one theme
Reported from the sessions, and from the two hours afterwards.