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c/retatrutide·posted 4 months ago by u/signe_villalobos

genuine question about retatrutide that I am slightly embarrassed to ask

Lab Well Actually ×2 Slow Clap ×1

genuine question about retatrutide that I am slightly embarrassed to ask. Searched first, found three threads that contradict each other, hence the post.

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

Watched heart rate on a wearable across twelve weeks because the threads said to. It moved a little and I have no idea whether that means anything.

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

Please do not ask me what dose you should be on. I genuinely do not know and neither does anyone else here.

3,138 up / 759 down81% upvoted46 commentsid tyylsg23 Mar 2026

46 comments

21 in this archive, depth 4

best — the order this archive was captured in

u/niels_lindqvist297 points·4 months ago

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.

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u/yannick_barros238 points·4 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/cold_chromatogram_only0 points·4 months ago

The injection-site soreness profile felt different rather than worse. Hard to describe and impossible to quantify, so take it as an impression.

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u/signe_villalobosOP-13 points·4 months ago

The injection-site soreness profile felt different rather than worse.

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

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u/lina_bruun1 point·4 months ago

Careful with the rankings. A phase 2 result and a phase 3 result are not on the same evidential footing and cannot be listed in one table.

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u/sena_teixeira1 point·4 months ago

Correction: TRIUMPH is the phase 3 programme. The number you are quoting is from the phase 2 readout, which is a different trial.

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u/tired_ledger_notes231 points·4 months ago

Went up slowly, deliberately, because everything on this board says the escalation is where trouble lives. Uneventful so far and I am not going to pretend that is a finding.

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[deleted]91 points·4 months ago

[deleted]

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u/cormac_roos114 points·4 months ago

Disagree. "More receptors means more effect" is not how any of this works and the trial data does not support the linear story.

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u/reta_and_regretMOD155 points·4 months ago

Trial names corrected in the title. The phase 3 programme and the phase 2 readout are not the same thing.

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u/signe_villalobosOP113 points·4 months ago

heart rate is the thing people report watching

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u/incretin_ivypharmacology53 points·4 months ago

the glucagon component is why the metabolic story reads differently

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u/lane_watchermod · logistics14 points·4 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/signe_villalobosOP20 points·4 months ago

Stopped at a low step because there was no reason to go further and no data to tell me what further would do.

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u/sofia_wikstrom35 points·4 months ago

the escalation is where most of the reported trouble sits

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u/rui_only_ro130 points·4 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/farid_molnar104 points·4 months ago

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/titration_marshalmod · c/semaglutide59 points·4 months ago

Sent a vial to Medutest out of curiosity. Result was 99.6% against a claimed 99.0%, which is the first independent number I had seen for this compound anywhere.

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u/divya_bakken66 points·4 months ago

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

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u/bastian_ekstrom28 points·4 months ago

Kept a log specifically because there is so little published.

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

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u/arne_amankwah58 points·4 months ago·edited

small trial, big effect, wide error bars

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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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