[Needs Source] "it heals your metabolism" is not a mechanism
"it heals your metabolism" is not a mechanism. It is the sort of thing everyone half-believes and nobody writes down.
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.
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
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.
glucagon agonism sounds paradoxical until you read the energy expenditure work
The GIP question, which is the most interesting unsettled thing in this field.
Dual agonism at GIP and GLP-1 receptors produces clinical results that are robust and well replicated. What is not settled is the mechanism by which the GIP arm contributes — there is a genuine scientific argument about agonism versus antagonism at that receptor, with reasonable people and real data on both sides.
It is worth sitting with that. The clinical effect is not in doubt; the explanation is. That is an ordinary state of affairs in pharmacology and it is a good corrective to the confident mechanistic stories that circulate here.
Is there any human data on that mechanism yet?
Spent an evening on the receptor distribution literature and the side-effect map suddenly stopped looking random.
Speculation is welcome here if it is labelled. This one has been relabelled rather than removed.
What was the exposure in that experiment relative to therapeutic?
receptor agonism is not the same as receptor activation in every tissue
GIP is the arm people argue about because the biology is genuinely unsettled
- 1The GIP question, which is the most interesting unsettled thing in this…8 comments in this branch · started by u/gastric_emptying_g