I have been on semaglutide for nine months, currently holding 1.7mg rather than pushing to 2.4mg, and the last two dose steps bought me much less than the first two did.
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.
The narrow version of the question is how much of the between-person variation is pharmacokinetic and how much is just adherence measured badly.
I would rather have one careful answer than five confident ones.
Taking the question as asked, rather than the general version of it. 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.
HPLC_Greg said:Albumin binding above 99% is the whole reason weekly dosing works, and it is also why the trough matters more than the peak.
That is correct as far as it goes, and here is where it stops going. 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".
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Browse GL BiochemFDA_TrackerJim said:I have been on semaglutide for nine months, currently holding 1.7mg rather than pushing to 2.4mg, and the last two dose steps bought me much less than…
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.
If somebody has the primary source to hand I would rather cite it than paraphrase it.
Clinical perspective, offered as context rather than as advice.
FDA_TrackerJim said:...but the FDA says semaglutide...
Interesting point. I want to add some regulatory nuance: the FDA labeling reflects the specific clinical trial data submitted for approval. Real-world clinical practice often extends beyond the FDA label based on emerging evidence and clinical judgment.
Example: semaglutide was first approved for diabetes (Ozempic), then obesity (Wegovy). The molecule didn't change — our understanding of its applications expanded. Similarly, semaglutide may evolve as more data accumulates.