December 2025

What actually helps, ranked by evidence

Dietary measures are widely recommended, plausible on mechanism, and supported mainly by observational data and clinical…

The escalation table is the thinnest page in the label

The published ladder exists because a protocol needed a single number. Practice has never followed it exactly, and the…

GIP was a failed target for thirty years. Then it was not.

A dual agonist is one molecule with two receptor activities. A co-formulation is two molecules in one pen. The coverage treats…

A supply gap is a pharmacological event

The convention — resume lower, re-escalate — is not caution. It follows directly from the elimination half-life.

The effect profile, predicted from an expression map

The receptor populations that produce satiety and the ones that produce nausea overlap substantially. That is why the ceiling of…

The mechanism behind the mechanism

The clinical effect profile is almost fully predictable from where the receptor is expressed, which is unusual and useful.

The mechanism behind the mechanism

The clinical effect profile is almost fully predictable from where the receptor is expressed, which is unusual and useful.

Reading the semaglutide titration schedule as a regulatory artefact

The published ladder exists because a protocol needed a single number. Practice has never followed it exactly, and the…

What we asked twenty suppliers about stability data

What would make a difference is not a regulator. It is three lines on a certificate, all of which are already known to whoever…

What the four services actually offer, test by test

Four independent services underpin confidence in this market. All four are competent at chemistry. Microbiology is a different…

Who chose the vial that was tested?

The condition on arrival is recorded by some services and not others, and it is one of the more informative lines in a report.

The submitted sample: the weakest link in the whole system

Every third-party report in this market describes a sample somebody chose to send. That choice is outside the laboratory’s…

LAL, kinetic chromogenic, recombinant factor C: three ways to the same figure

We submitted vials for endotoxin determination and report the results, the method and the laboratory, because a pyrogen figure…

Date of analysis, date of manufacture, and the gap between them

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…

Custody, condition and the temperature nobody logged

The condition on arrival is recorded by some services and not others, and it is one of the more informative lines in a report.

A reference interval is not a target, and a result outside one is not a diagnosis

Almost every misreading of a laboratory panel is a misunderstanding of what a reference interval is and how much a result has to…

Measuring more frequently generates more flags and not more information

The argument for a baseline panel is that it makes every subsequent result interpretable. The argument against frequent…

The supply gap as a clinical event

Real-world persistence figures, with their definitions stated, because the definitions are doing most of the work.

The skeleton responds to load, and load is falling

Density is a proxy for strength and an imperfect one, particularly when soft-tissue thickness over the measurement site is…

Fructosamine, glycated albumin, and the shorter window nobody orders

The alternatives with shorter windows, what they measure, and why they are rarely ordered.

Load, not cardio: the distinction the general advice keeps losing

The recommendation survives scrutiny. The reasoning offered for it frequently does not.

The out-of-range flag is a statistical convention with a printer attached

A flag is a probability statement about a population. It is not a statement about the person holding the printout.

We split six vials four ways and posted them

Two years ago we ran an anonymised version of this comparison and promised a named one. This is it, with every method printed in…

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…

Nought point nine eight of a dalton: the modification that hides in plain sight

Deamidation adds 0.98 daltons. On a low-resolution instrument at incretin molecular weights, that is inside the noise.

Sterility is not a percentage, which is the whole difficulty

Purity, content, identity, sterility and endotoxin are five separate determinations. A single sheet of paper carrying one of…

Asparagine, glycine, and the two residues that decide a shelf life

An isoaspartate rearrangement changes the molecule and not the mass. A method that confirms identity by molecular weight alone…

The reviewer, the approver, and why regulated documents carry two names

Somebody has to be answerable for a release document. On most certificates in this market, nobody is named at all.

What twenty companies say about storage, and what they have measured

We asked twenty companies three questions about stability data and print every answer, refusal and non-response.

The intramuscular injection nobody intended

Longer needles reach muscle in lean limbs, and intramuscular delivery of a long-acting depot changes absorption in ways nobody…

The one randomised trial that combined an incretin with supervised exercise

The older-adult diet-and-exercise trials are the closest analogue to rapid pharmacological weight loss, and they are twenty…

The one randomised trial that combined an incretin with supervised exercise

Mass and function are different endpoints and training affects them differently. Most coverage treats them as one.

What the liraglutide schedule assumes about a person it has never met

The four-week step exists because four to five weeks is approximately how long a once-weekly drug takes to stop rising at a…

The out-of-range flag is a statistical convention with a printer attached

The arithmetic of the reference change value, worked for the analytes that matter here.

The arithmetic of a step: what doubling a dose actually asks of you

We work the arithmetic out in full, because it is arithmetic and it is short.

Thiamine and the vomiting patient

What the trials measured, which in the case of micronutrients is very little.

The badge is about a sample. The listing is about a product.

Lot-level verification with a public report is a real and achievable thing. It exists in this market, on a minority of listings.

The supply gap as a clinical event

A supply interruption is a discontinuation with no notice, no taper and no plan. That is a distinct clinical situation.

Side effects, cost, supply, target: four reasons with four trajectories

A supply interruption is a discontinuation with no notice, no taper and no plan. That is a distinct clinical situation.

The submitted sample: the weakest link in the whole system

What a laboratory can and cannot know about the provenance, storage history and representativeness of what lands on its bench.

What happens when the drug is taken away: three randomised answers

What was withdrawn, from whom, after how long, and what was measured afterwards.

What a split-sample exercise can establish, and what it cannot

The Journal submitted split samples from single lots to three assay services, under names unconnected to this publication, and…

The lowest effective dose is a real concept with almost no data behind it

The commonest real-world strategy in this drug class is the least studied one.

The 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…

Two decimal places, one injection, no procedure

This piece takes the measurement apart into the decisions it is made of, because each decision moves the answer.

Oxidation, and the peroxide that came in with the surfactant

Deamidation, oxidation, aggregation and hydrolysis account for nearly all of what happens to a peptide over time. Each has a…

Counter-ion, water, salt: three masses with no chromatogram

The most useful single addition to any purity determination is a second separation under a different pH or on a different…

Mean kinetic temperature is not the average temperature

A single-use logger records the air adjacent to itself at a fixed interval. Where it sits in the package, and how often it…

Why the theoretical mass on the certificate might be the wrong theoretical mass

A worked example: one peptide, five charge states, five mass-to-charge ratios, one molecular weight.

The pyrogen question has a price, and it is not the price of a purity run

A compendial sterility test takes fourteen days of incubation and consumes the containers tested. That timescale is incompatible…

A calculation you should do twice and write down once

Every time a vial changes, the conversion must be recalculated. Carrying forward a unit count from the last vial is the single…

The out-of-range flag is a statistical convention with a printer attached

A flag is a probability statement about a population. It is not a statement about the person holding the printout.

A mass on a WWB certificate is a beginning, not a conclusion

What a single-stage mass measurement supports, what it excludes, and the gap between the two.

Tandem mass spectrometry, and the difference between weighing and reading

An intact mass measurement establishes elemental composition, at best. The number of distinct sequences consistent with a given…

What the anaesthetists said, and then said again

A drug that delays gastric emptying complicates the assumption behind every fasting instruction in perioperative medicine. The…

The upper rungs, ranked by evidence

We looked at what the dose-ranging data supports about going higher, and it is thinner and less flattering than the market…

Storage after reconstitution, and the evidence behind the numbers

The air shot before a pen injection removes air from the cartridge and confirms flow. Skipping it can mean a materially reduced…

Residual stomach content on endoscopy: the studies

Holding a dose before a procedure has a kinetic problem: a weekly drug with a seven-day half-life cannot be cleared by skipping…

The interventions with trial support, and the much longer list without

Almost nothing in the standard management repertoire has been tested in a randomised trial in this specific population. We say…

Baseline construction, and the area that depends on where you draw the line

Chromatographic software does not integrate every fluctuation in the baseline. It applies a threshold, and the threshold changes…