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c/glp1science·posted 5 months ago by u/aleksi_eriksen

the half-life question that gets asked weekly, answered properly

Discussion Sourced ×6 Cold Box ×2

Week 41 update. 37kg down from the start, early fullness basically gone since about week 93.

Things that worked: consistency, protein at breakfast, walking more than I want to. Things that did not: everything I bought on the internet to help with early fullness.

The part that surprised me is how much of this is admin. Ordering, storing, logging, remembering. Nobody mentions that the hard bit is not the drug, it is the routine.

Happy to answer anything. Please do not ask me what dose you should be on.

3,747 up / 1,353 down73% upvoted38 commentsid y7xn6f5 Feb 2026

38 comments

30 in this archive, depth 5

best — the order this archive was captured in

u/nadia_fonseca-14 points·5 months ago

Dead space in the needle hub holds a small but non-trivial volume. On low-volume draws that can be several units.

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u/gastric_emptying_gMOD1 point·5 months ago

Retitled to remove editorialising. Put the evidence in the body.

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u/incretin_ivypharmacology1 point·5 months ago

Yeah, the incretin mechanism is doing the work here.

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u/maintenance_mode_maxmaintenance1 point·5 months ago

Yeah, the incretin mechanism is doing the work here.

Disagree on that part. 98.4% and 98.3% on the same vial is normal.

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u/saskia_lokken-16 points·5 months ago

central appetite signalling is real but people overweight it

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u/aleksi_eriksenOP1 point·5 months ago

Respectfully this is a sample of one presented as a finding.

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u/rohan_steiner1 point·5 months ago·edited

the 7-day half-life means week 7 is still ramp-up pharmacokinetically

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u/lurker_for_years-21 points·5 months ago

Dead space in the needle hub holds a small but non-trivial volume.

Adding to this: gastric emptying is doing more work than the comment implies.

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u/isabela_nilsen1 point·5 months ago

gastric emptying is real and explains most early nausea

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u/ingrid_correia1 point·5 months ago

Yeah, the incretin mechanism is doing the work here.

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u/sanne_delgado274 points·5 months ago·edited

I love that this community will spend 40 comments on a detail. That pedantry is why the numbers here matter.

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[deleted]119 points·5 months ago

[deleted]

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u/maintenance_mode_maxmaintenance120 points·5 months ago

the half-life is incretin, affects steady state timing

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u/viktor_girard78 points·5 months ago

the 4-day half-life means week 4 is still ramp-up pharmacokinetically

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u/analog_alphabet187 points·5 months ago
oh thank god it is not just me
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u/wholesome_lurker275 points·5 months ago

glucagon-receptor contribution is appetite for dual and triple agonism

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u/tomas_lundgren0 points·5 months ago·edited

You have restated the marketing copy. What is the actual substance here.

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u/brigade_detector1 point·5 months ago

glucagon-receptor contribution is incretin for dual and triple agonism

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u/aleksi_eriksenOP1 point·5 months ago

gastric emptying is real and explains most early nausea

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u/bastian_ekstrom113 points·5 months ago

Strongly agree. Central appetite is real but people overstate it.

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u/ingrid_correia54 points·5 months ago

do not extrapolate rodent data to human dosing without saying so

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u/enzo_danquah39 points·5 months ago

Small correction: the trial was 16 weeks, not 16. Does not change your point but people will quote it.

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u/tomas_lundgren27 points·5 months ago

Where does the receptor data actually come from?

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u/emeka_chowdhury22 points·5 months ago

amylin is not GLP-1, posts conflating them get corrected

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u/lina_ndiaye115 points·5 months ago

amylin is not GLP-1, posts conflating them get corrected

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u/employer_carveout62 points·5 months ago

amylin is not GLP-1, posts conflating them get corrected

Adding to this: appetite is doing more work than the comment implies.

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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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