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c/glp1science·posted 2 years ago by u/employer_carveout

help me understand half-life, I have read the wiki twice

Speculation Long Haul ×4 Cold Box ×3 Slow Clap ×2

Asking properly rather than in a comment on somebody else’s thread: help me understand half-life, I have read the wiki twice.

The half-life explanation was the thing that made weekly dosing intuitive for me rather than arbitrary.

Started reading limitations sections first. It has changed how much weight I give to almost everything posted here.

Went looking for human data on a mechanism everybody here asserts. Found preclinical work and one small study. That was clarifying.

If somebody has the same thing measured a different way, post it next to mine and we will see whether they agree.

4,024 up / 528 down88% upvoted50 commentsid mf55918 Jul 2024

50 comments

24 in this archive, depth 5

best — the order this archive was captured in

u/incretin_ivyMOD348 points·2 years ago

Left up and flaired Explainer. This is the standard of post the board was created for.

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u/hassan_castellanos282 points·2 years ago

Small fix — it slows gastric emptying, it does not halt it, and the distinction matters for the mechanism you are proposing.

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u/lurker_for_years93 points·2 years ago

dose response is not linear and nobody should assume it is

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u/ismael_chukwu272 points·2 years ago

Cosigning on GIP. The genuinely interesting thing is that the biology is not settled and the clinical result is nonetheless robust.

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u/annika_fonseca483 points·2 years ago

Is there any human data on that mechanism yet?

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u/gastric_emptying_g393 points·2 years ago

Correction: that is glucose-dependent insulin secretion, which is why hypoglycaemia risk is low as monotherapy. Not the same claim as you made.

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u/nora_lundgren-20 points·2 years ago·edited

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.

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u/camila_mensa1 point·2 years ago·edited

GIP is the arm people argue about because the biology is genuinely unsettled

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u/osman_eriksen173 points·2 years ago

Asked a question here that I thought was stupid and got three papers back. Best thread I have been in on this site.

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u/bastian_eriksen136 points·2 years ago

That study was in a rodent model. Worth stating, since the thread has been reading it as human data.

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u/niels_roos110 points·2 years ago

tolerance to the gastric effect develops, appetite effect largely persists

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u/nhs_waitlist_nUK170 points·2 years ago

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.

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u/nadia_fonseca236 points·2 years ago

Glucose-dependent insulin secretion is why hypoglycaemia risk is low as monotherapy: the effect scales with glycaemia rather than acting unconditionally.

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u/zeynep_villalobos79 points·2 years ago

Yes. The central component is the one that explains the reports on this site better than gastric emptying does.

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u/amara_dziedzic79 points·2 years ago·edited

GIP receptor biology is genuinely unsettled — there is a live argument about agonism versus antagonism at the receptor — and the clinical results are

nhs_waitlist_n is right that mechanism gives direction and not magnitude. Worth pinning.

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u/marisol_kravchenko0 points·2 years ago

Careful — you have a plausible mechanism and no evidence that it is the operative one in the case you are describing.

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u/nurse_ish_20251 point·2 years ago

Are we talking about receptor affinity or clinical potency?

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u/devils_advocate_d1 point·2 years ago

mechanism explains a direction, not a magnitude

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u/employer_carveoutOP1 point·2 years ago

glucagon agonism sounds paradoxical until you read the energy expenditure work

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u/formulary_fighterappeals1 point·2 years ago

incretin effect first, then everything else in this board makes sense

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u/yusuf_ramos1 point·2 years ago

Agreed — the incretin effect is the load-bearing concept and everything downstream reads differently once you have it.

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[deleted]1 point·2 years ago

[deleted]

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u/nadia_bakker1 point·2 years ago·edited

mechanism explains a direction, not a magnitude

Agreed — and it is why the central and peripheral stories are complementary rather than rival.

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u/swirl_dont_shakereconstitution68 points·2 years ago

Does the effect persist with continued dosing or does tolerance develop?

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The mechanism layer: incretin physiology, receptor distribution, gastric emptying, central appetite signalling, glucagon-receptor contribution, amylin co-agonism, and the pharmacokinetics that make weekly dosing possible. Papers get cited by journal and year or they get a [needs source] reply.

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