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 VanRx_Mike — and this may be the naive question:
How much of the between-person variation is pharmacokinetic and how much is just adherence measured badly?
NicoleRaleigh said:Worth knowing that the injection site changes very little.
Coming at NicoleRaleigh’s question from a different direction. Steady state is the thing most people miss. The terminal half-life is about a week, so every dose step takes four to five weeks to fully express itself. Judging a step at day ten is judging the ascent, not the plateau, and it is the single commonest reason people escalate before they needed to.
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Browse GL BiochemOP back with an update, since a thread like this is useless without one.
Six weeks on from posting: I stopped reading the weekly number and started reading a four-week average, and the "stall" I opened this thread about was a 1.8kg loss I could not see.
PharmD_Rodriguez said:Steady state is the thing most people miss.
PharmD_Rodriguez has the substance of this right. The condition it depends on is worth stating. 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.