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c/retatrutide·posted 1 months ago by u/honest_syringe33

week 21 check-in — 8kg down, fatigue manageable, one thing confusing me

Discussion Receipts ×6 Well Actually ×1

week 21 check-in — 8kg down, fatigue manageable, one thing confusing me. Posting the boring middle of the process, because the internet is full of the start and the end and nothing else.

Numbers, in the order they matter: week 21 and 8kg.

The standing caveat, written out properly because it keeps getting compressed into a footnote.

Nothing containing this compound is approved by any regulator. Research-use-only material is not approved for human use. That is not a legal formality on this board — it is why there is so little independent data, why the escalation schedules people post are invented, and why nobody here can answer a dosing question.

What this board can usefully do is read the published trials carefully, log independent purity results, and be honest about how thin the evidence base is. Everything else belongs somewhere with a clinician in it.

What the glucagon arm is doing, as best anyone can say from public data.

GLP-1 and GIP agonism cover appetite and insulin secretion in ways that are now reasonably well characterised. Glucagon receptor agonism is the third leg and it is associated with increased energy expenditure and with effects on hepatic fat.

Mechanistically that is why this compound reads as a different proposition rather than a stronger version of a dual agonist. Clinically, the size and durability of that difference in humans is precisely what is not yet established, and anyone telling you otherwise is filling a gap with confidence.

Not medical advice, obviously, and nothing here is approved for human use. One person with a spreadsheet.

2,082 up / 113 down95% upvoted38 commentsid usca9r10 Jun 2026

38 comments

12 in this archive, depth 4

best — the order this archive was captured in

u/nabila_bakken118 points·1 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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[deleted]42 points·1 months ago

[deleted]

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u/yusuf_ramos178 points·1 months ago

How fast was the escalation? That is usually the variable that explains the reports.

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u/arne_amankwah102 points·1 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/ferran_krastev62 points·1 months ago

This. The phase 2 result was genuinely large and it was also 48 weeks in a few hundred people.

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u/honest_syringe33OP47 points·1 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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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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