Adding the numbers, since they settle part of this. Worth knowing that the injection site changes very little. Abdomen, thigh and upper arm are bioequivalent for semaglutide, so a site change is not a plausible explanation for a bad week.
Following on from GenomicsKate — and this may be the naive question:
What the dose-response curve actually looks like above 1.7mg, because the trial means hide how few people account for the extra loss?
dan_philly said:Worth knowing that the injection site changes very little.
There is a second half to this that has not been said yet. 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.
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View ResultsOP back with an update, since a thread like this is useless without one.
Following this thread I went back and re-read the extension data properly. The point about trough rather than peak explains the pattern I was seeing on day six, which I had been blaming on the vial.
NurseLeah_Nash said:Albumin binding above 99% is the whole reason weekly dosing works, and it is also why the trough matters more than the peak.
NurseLeah_Nash has the substance of this right. The condition it depends on is worth stating. The dose-response is real but shallow at the top. Across STEP 1 and STEP 4 the gap between 1.7mg and 2.4mg is a couple of percentage points of body weight on average, and the average is carrying a wide spread — plenty of people at 1.7mg sit above the 2.4mg mean. If a dose is working and tolerable, "working" is the relevant variable, not "maximal".