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c/retatrutide·posted 6 months ago by u/jarno_cabrera

genuine question about glucagon that I am slightly embarrassed to ask

Lab Receipts ×7

genuine question about glucagon that I am slightly embarrassed to ask. I would rather ask a basic question now than get this wrong quietly for two months.

Glucagon receptor agonism is associated with increased energy expenditure and with hepatic effects. That is a mechanistic story with strong preclinical support and limited phase 2 human data.

The phase 2 readout ran to 48 weeks in a few hundred participants with a slow escalation. Both the size and the duration matter when people quote the headline number.

Increases in heart rate have been reported across this receptor class. The magnitude and clinical significance are exactly what phase 3 is powered to establish.

Research-use-only material is not approved for human use and nothing here should be read as a recommendation to use it.

383 up / 15 down96% upvoted14 commentsid wgy6j612 Jan 2026

14 comments

14 in this archive, depth 4

best — the order this archive was captured in

u/farid_molnar76 points·6 months ago

Nothing containing this compound is approved anywhere. Research-use-only material is not approved for human use, and that is a statement of fact rather than a disclaimer.

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[removed]28 points·6 months ago

[removed by moderator]

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u/hassan_nilsen44 points·6 months ago

research-use-only material is not approved for human use, full stop

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u/solene_ilunga18 points·6 months ago

Phase 2 estimates effect and finds a dose range. Phase 3 estimates it precisely in a bigger population and catches what phase 2 was too small to see. Treating them as the same tier of evidence is the recurring error here.

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u/yannick_barros6 points·6 months ago

What is the source for that figure — the published paper or a summary of it?

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u/tired_ledger_notes45 points·6 months ago

comparing reta phase 2 to sema phase 3 is comparing different things

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u/jarno_cabreraOP24 points·6 months ago

Small fix — three receptors, not two. GLP-1, GIP and glucagon, and the third one is the reason this compound gets its own board.

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u/bilal_osei28 points·6 months ago

Cosigning the escalation point. Almost every difficult report on this board is from somebody who went up quickly.

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u/iman_castellanos18 points·6 months ago

Push back: quoting the phase 2 headline as an expected outcome is not a fair reading of a small trial with wide intervals.

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u/divya_bakken11 points·6 months ago

wait for phase 3 before you argue about rankings

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u/niels_lindqvist29 points·6 months ago·edited

Sent a vial to Medutest out of curiosity. Result was 98.2% against a claimed 97.5%, which is the first independent number I had seen for this compound anywhere.

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u/reta_and_regretMOD14 points·6 months ago

Standing reminder in every thread here: unapproved compound, research material is not for human use, nothing on this board is medical advice.

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u/marit_laurent0 points·6 months ago

Standing reminder in every thread here: unapproved compound, research material is not for human use, nothing on this board is medical advice.

Agreed, and the glucagon arm is exactly why the comparison threads do not work.

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u/nadia_trevino4 points·6 months ago

Standing reminder in every thread here: unapproved compound, research material is not for human use, nothing on this board is medical advice.

Disagree with this specific inference. A 48-week readout does not tell you the shape of the curve after it.

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About c/retatrutide

Retatrutide: GIP/GLP-1/glucagon triple agonism, the TRIUMPH programme, and the fact that most people discussing it are handling research-grade material with no human-use approval anywhere. Dose-response, heart-rate signal, and the unusually steep phase-2 weight curves get argued about here weekly.

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