This gets cited here weekly, usually second-hand, so it is worth setting out what it does and does not establish.
The mechanism that matters here is not stomach emptying, it is central. GLP-1 receptor agonism in the arcuate nucleus stimulates POMC neurons and suppresses AgRP/NPY signalling, which is why the effect is appetite and food salience rather than physical fullness. Delayed gastric emptying largely tachyphylaxes over the first months; the appetite effect does not.
Where I think it is weakest: the population was selected and supported in ways a real cohort is not, so I would read the effect size as a ceiling rather than an expectation.
What I am after is what the dose-response curve actually looks like above 1.7mg, because the trial means hide how few people account for the extra loss. Tell me what I have not thought of.
MASHdoc_SA said:The mechanism that matters here is not stomach emptying, it is central.
All true, with one condition: that curve is for people who reached the dose on schedule. Anyone who slowed the ladder for tolerability is on a different, flatter curve, and comparing yourself with the published mean will make you feel like a non-responder when you are not.
MASHdoc_SA said:The mechanism that matters here is not stomach emptying, it is central.
I will push back on the "any working dose is fine" framing. The maintenance evidence sits overwhelmingly at the top studied dose, and the extension data shows regain tracking dose reduction rather than tracking stopping. Holding low is reasonable; pretending it is evidentially equivalent is not.
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Shop Reference StandardsThis one has a reasonably settled answer, so here it is. Albumin binding above 99% is the whole reason weekly dosing works, and it is also why the trough matters more than the peak. People who dose late are not losing a peak, they are letting the trough fall, and the appetite effect tracks the trough.
amsterdam_pete said:All true, with one condition: that curve is for people who reached the dose on schedule.
That holds for the injectable. The oral formulation has different absorption behaviour and the dose numbers are not interchangeable, which is worth saying out loud because people quote them as if they were.