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c/retatrutide·posted 2 months ago by u/rohan_cardoso

does phase 2 actually matter or is it forum lore at this point

Trial Data Cold Box ×1 The Quiet One ×3 Well Actually ×1

does phase 2 actually matter or is it forum lore at this point, and I want the answer with the reasoning attached rather than just the conclusion.

Where the evidence actually stands, since every thread here assumes a different answer.

Phase 2 reported a large mean body weight change at 48 weeks across a few hundred participants with a slow, protocol-driven escalation. The effect size was striking. The confidence intervals were wide, the population was small, and the duration was under a year.

Phase 3 is running. Until it reports, everything else — including the ranking arguments this board loves — is extrapolation from a small study. That is not a criticism of the compound; it is a description of the evidence.

Kept a log specifically because there is so little published. It is one person and it is not data.

The thing that surprised me was how much of the discussion here is inference rather than measurement.

I will update this if the picture changes rather than quietly leaving it up.

4,992 up / 510 down91% upvoted22 commentsid u8g8ds8 May 2026

22 comments

19 in this archive, depth 5

best — the order this archive was captured in

u/bilal_osei558 points·2 months ago

It is a triple agonist at the GLP-1, GIP and glucagon receptors. The glucagon arm is the genuinely novel component and it is the one with the least human outcome data behind it.

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u/renzo_yildiz186 points·2 months ago

Read the phase 2 paper twice before ordering anything. Recommend that to anyone in this board: the error bars are the interesting part.

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u/yannick_barros123 points·2 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/incretin_ivypharmacology58 points·2 months ago

the glucagon component is why the metabolic story reads differently

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u/emil_wojcik312 points·2 months ago·edited

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.

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u/trialwatch_theotrial nerd186 points·2 months ago

the TRIUMPH programme is still running, so anything definitive is premature

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u/bilal_osei130 points·2 months ago

the TRIUMPH programme is still running, so anything definitive is premature

trialwatch_theo is right about the escalation being the variable. It explains most of the difficult reports here.

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[deleted]48 points·2 months ago

[deleted]

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u/noor_ivaturi62 points·2 months ago

Independent purity testing on this compound is thin compared with the older molecules, simply because fewer members have paid for it. Fewer results means wider uncertainty, not a verdict.

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u/deleted_my_history51 points·2 months ago

That is body weight change, not fat mass. The trials report the first and people quote it as the second.

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u/reta_and_regret26 points·2 months ago

wait for phase 3 before you argue about rankings

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u/signe_villalobos121 points·2 months ago

Which phase 2 arm are you quoting, and at what week?

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u/hugo_pires55 points·2 months ago

not approved anywhere, which is the single most important fact in this board

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u/zeynep_mbeki97 points·2 months ago

Yes — the glucagon arm is what makes it a different proposition rather than a stronger version of the others.

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u/rohan_cardosoOP48 points·2 months ago

phase 2 data only, and people quote it like it is a label

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u/jarno_cabrera76 points·2 months ago

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.

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u/ewan_zielinski107 points·2 months ago

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

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u/marit_laurent156 points·2 months ago

Are you comparing against phase 3 numbers for something else? They are not comparable.

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u/ewan_zielinski85 points·2 months ago

the escalation is where most of the reported trouble sits

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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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