appetite is the most under-discussed thing on this board
appetite is the most under-discussed thing on this board. Change my mind, genuinely — I have no stake in being right about this.
GIP receptor biology is genuinely unsettled — there is a live argument about agonism versus antagonism at the receptor — and the clinical results are robust regardless, which is an uncomfortable and interesting position.
Long half-life in this class comes from structural modification that promotes albumin binding and resists enzymatic degradation. Weekly dosing is a consequence of the molecule, not a convenience decision.
Glucose-dependent insulin secretion is why hypoglycaemia risk is low as monotherapy: the effect scales with glycaemia rather than acting unconditionally.
That is everything I have. The rest is opinion and I have tried to keep it out.
best — the order this archive was captured in
Tolerance to the gastric effect develops with continued exposure while the appetite effect largely persists. That single fact explains most of the "it settles but it still works" pattern the side-effect board reports.
Read the primary paper after arguing about the summary for a fortnight. The discussion section said almost the opposite of what the thread had concluded.
mechanism explains a direction, not a magnitude
mechanism explains a direction, not a magnitude
Disagreeing with this specific inference — that is a preclinical result being read as human pharmacology.
Small fix — it slows gastric emptying, it does not halt it, and the distinction matters for the mechanism you are proposing.
gastric emptying slows, it does not stop
Not convinced by the linearity assumption. Dose-response in this class is not linear and the trials show it.
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Agreed that receptor distribution is the key to the side-effect map. It is not a mystery, it is anatomy.
That study was in a rodent model. Worth stating, since the thread has been reading it as human data.
read the discussion section, that is where the honesty lives
What was the exposure in that experiment relative to therapeutic?
Retitled to distinguish preclinical from clinical, which the original ran together.
Was completely wrong about the gastric emptying story in a thread here two years ago. Someone corrected me with a citation and I have not made that mistake since.
What was the exposure in that experiment relative to therapeutic?
Agreed — and it is why the central and peripheral stories are complementary rather than rival.
Careful — you have a plausible mechanism and no evidence that it is the operative one in the case you are describing.
Careful — you have a plausible mechanism and no evidence that it is the operative one in the case you are describing.
split_dose_sceptic is right that mechanism gives direction and not magnitude. Worth pinning.
a mechanism you can state is not a mechanism you have demonstrated
Same view. Tolerance developing to the gastric effect while the appetite effect persists explains most of what the side-effect board reports.
The incretin effect is the observation that oral glucose provokes a larger insulin response than intravenous glucose at matched glycaemia, and the difference is mediated by gut hormones. That is the foundation the whole class sits on.
albumin binding is most of the half-life story
GLP-1 receptor agonism acts both peripherally — insulin secretion in a glucose-dependent way, slowed gastric emptying — and centrally, on appetite regulation. The central component is the better explanation for sustained intake reduction.
half-life is why these are weekly and not daily
glucagon agonism sounds paradoxical until you read the energy expenditure work
Went looking for human data on a mechanism everybody here asserts. Found preclinical work and one small study. That was clarifying.
dose response is not linear and nobody should assume it is
receptor distribution is why the side effects are where they are
- 1Tolerance to the gastric effect develops with continued exposure while the…11 comments in this branch · started by u/niels_roos
- 2What was the exposure in that experiment relative to therapeutic?7 comments in this branch · started by u/devils_advocate_d