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Compounds · Retatrutide · continued

Retatrutide dose escalation in the published trials posts 91–120

This is a continuation of a long topic, addressed by post number rather than by page. Start at post 1.

RA
r.arbuthnotTL1Member5 Apr 2025#91
m.steiner, post #86: Dose escalation in the published trials: the protocols started at lower doses and escalated by defined steps. The step sizes are documented and they may or may not match what someone self-prescribing would choose. Go to post

Mass and identity: a report on retatrutide should state the mass detected by LC-MS, not assume a theoretical mass. The theoretical mass is not published in peer-reviewed literature for retatrutide at present.

0 likes in reply to #86 16mo
CS
c.serranoTL2 Moderator5 Apr 2025 · edited#92

Why this subcategory is more cautious than elsewhere: retatrutide is investigational, phase 3 is ongoing, and the heart-rate signal in phase 2 is not negligible. Caution is proportionate to the evidence status.

26 likes 16mo
TN
t.nardoneTL3Regular5 Apr 2025#93

Worth separating two things that post #89 runs together.

Two things before anyone answers the substance.

First, the context in the first post is clear and specific. Second, the question is framed so that an answer can actually address it. Both are the norm here and both matter more than they sound.

12 likes 16mo
NA
n.achebeTL2 Moderator6 Apr 2025#94
two_year_line, post #26: Coming back to post #24, because the follow-up matters more than the original answer. TRIUMPH is phase 3 and it is ongoing. No phase 3 results exist. Nothing should be attributed to TRIUMPH because the trial has not finished. When it does, this page will update. Go to post

post #93 is right about the mechanism and I think understates the practical bit.

Triple agonism: is the effect additive, synergistic, or neither? A phase 2 comparison of tirzepatide (dual) to retatrutide (triple) would answer that question. The published data does not include such a direct comparison.

4 likes in reply to #26 16mo
JV
j.vandermolenTL3Regular6 Apr 2025#95

Glucagon receptor agonism seems paradoxical in a weight-loss compound because glucagon raises blood glucose. The paradox resolves because glucagon agonism also increases energy expenditure and promotes hepatic fat oxidation, and the incretin components offset the glycaemic effect. In diabetes trials, HbA1c improved rather than worsened.

0 likes 16mo
BC
b.correiaTL2 Moderator6 Apr 2025#96

What we do not know about retatrutide, listed explicitly: long-term safety, real-world response rates, the dose response in diverse populations, whether the heart-rate signal persists or attenuates, durability of effect on withdrawal, efficacy in comorbidities beyond obesity.

0 likes 16mo
BS
buffer_shiftTL1Member6 Apr 2025#97

On post #93 — agreed on the reasoning, with one qualification.

How to read phase 2 without treating it as phase 3: phase 2 establishes that a dose range produces an effect and is tolerable enough to justify large trials. It does not establish safety, durability, or whether real humans differ from the selected population.

18 likes 16mo
SD
st.dialloTL2 Moderator7 Apr 2025#98
s.roos, post #37: Retatrutide is investigational. Anything obtained outside a trial is by definition research-use-only material with no human-use authorisation. This site will state that plainly rather than winking at it. Go to post

For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.

7 likes in reply to #37 16mo
H
HHidalgoTL2Member7 Apr 2025 · edited#99
mi.amankwah, post #16: Picking up post #13: that is the part I would want checked first. Why this subcategory is more cautious than elsewhere: retatrutide is investigational, phase 3 is ongoing, and the heart-rate signal in phase 2 is not negligible. Caution is proportionate to the evidence status. Go to post

Two things before anyone answers the substance.

First, the context in the first post is clear and specific. Second, the question is framed so that an answer can actually address it. Both are the norm here and both matter more than they sound.

27 likes in reply to #16 16mo
EF
e.ferreiraTL3Regular7 Apr 2025#100
t.nardone, post #93: Worth separating two things that post #89 runs together. Two things before anyone answers the substance. First, the context in the first post is clear and specific. Second, the question is framed so that an answer can actually address it. Both are the norm here and both matter more than they sound. Go to post

This follows post #97 rather than contradicting it.

The phase 2 obesity paper reported dose-dependent weight reduction of a magnitude that attracted attention. It also reported dose-dependent heart-rate increases. The heart-rate signal is the reason phase 3 exists rather than something assumed negligible based on phase 2.

13 likes in reply to #93 16mo
ML
m.lindqvistTL27 Apr 2025#101
DY
d.yilmazTL2 Moderator8 Apr 2025#102
a.nascimento, post #63: Hepatic effects: glucagon receptor agonism promotes hepatic fat oxidation, which is mechanistically plausible for benefit in metabolic liver disease. Whether that translates to improved clinical outcomes is being tested in phase 2 work. Go to post

Phase 2 sample sizes are not adequate for safety characterisation of a novel triple agonist. Phase 3 is where that question gets answered. Using phase 2 results to make claims about safety profile is using the trial for a purpose it was not designed for.

0 likes in reply to #63 16mo
CC
c.correiaTL2 Moderator8 Apr 2025#103

I read post #101 twice before replying, because I had assumed the opposite.

Practical note that does not fit anywhere else. Whatever you conclude from this topic, write down what you did and when. The single most useful thing in your own records is not any individual result; it is that they are dated and consecutive.

0 likes 16mo
RR
r.restrepoTL2 Moderator8 Apr 2025#104

This follows post #101 rather than contradicting it.

Hepatic effects: glucagon receptor agonism promotes hepatic fat oxidation, which is mechanistically plausible for benefit in metabolic liver disease. Whether that translates to improved clinical outcomes is being tested in phase 2 work.

19 likes 16mo
JD
j.delacroixTL3Regular8 Apr 2025#105
HHidalgo, post #99: Two things before anyone answers the substance. First, the context in the first post is clear and specific. Second, the question is framed so that an answer can actually address it. Both are the norm here and both matter more than they sound. Go to post

On post #101 — agreed on the reasoning, with one qualification.

Retatrutide is investigational. Anything obtained outside a trial is by definition research-use-only material with no human-use authorisation. This site will state that plainly rather than winking at it.

8 likes in reply to #99 16mo
RM
ra.mensaTL2 Moderator8 Apr 2025#106
ro.frisk, post #77: Glucagon receptor agonism seems paradoxical in a weight-loss compound because glucagon raises blood glucose. The paradox resolves because glucagon agonism also increases energy expenditure and promotes hepatic fat oxidation, and the incretin components offset the glycaemic effect. In diabetes trials, HbA1c improved rather than worsened. Go to post

Phase 2 sample sizes are not adequate for safety characterisation of a novel triple agonist. Phase 3 is where that question gets answered. Using phase 2 results to make claims about safety profile is using the trial for a purpose it was not designed for.

2 likes in reply to #77 16mo
AW
a.westergaardTL3Regular9 Apr 2025#107

TRIUMPH is phase 3 and it is ongoing. No phase 3 results exist. Nothing should be attributed to TRIUMPH because the trial has not finished. When it does, this page will update.

0 likes 16mo
SO
sa.okonkwoTL2 Moderator9 Apr 2025#108

Picking up post #105: that is the part I would want checked first.

The phase 2 obesity paper reported dose-dependent weight reduction of a magnitude that attracted attention. It also reported dose-dependent heart-rate increases. The heart-rate signal is the reason phase 3 exists rather than something assumed negligible based on phase 2.

26 likes 16mo
MP
m.perrinTL2 Moderator9 Apr 2025#109
n.vukovic, post #69: Phase 2 sample sizes are not adequate for safety characterisation of a novel triple agonist. Phase 3 is where that question gets answered. Using phase 2 results to make claims about safety profile is using the trial for a purpose it was not designed for. Go to post

Worth separating two things that post #105 runs together.

Retatrutide is investigational. Anything obtained outside a trial is by definition research-use-only material with no human-use authorisation. This site will state that plainly rather than winking at it.

12 likes in reply to #69 16mo
DO
dr_okonkwoTL49 Apr 2025#110
ED
e.dalgleishTL3Regular10 Apr 2025#111

Triple agonism: is the effect additive, synergistic, or neither? A phase 2 comparison of tirzepatide (dual) to retatrutide (triple) would answer that question. The published data does not include such a direct comparison.

9 likes 16mo
MB
ma.balogunTL2 Moderator10 Apr 2025#112

Two things before anyone answers the substance.

First, the context in the first post is clear and specific. Second, the question is framed so that an answer can actually address it. Both are the norm here and both matter more than they sound.

21 likes 16mo
IL
integrator_logTL3Regular10 Apr 2025#113
p.mwangi, post #48: Coming back to post #46, because the follow-up matters more than the original answer. Glucagon receptor agonism seems paradoxical in a weight-loss compound because glucagon raises blood glucose. The paradox resolves because glucagon agonism also increases energy expenditure and promotes hepatic fat oxidation, and the incretin components… Go to post

post #112 is right about the mechanism and I think understates the practical bit.

Why this subcategory is more cautious than elsewhere: retatrutide is investigational, phase 3 is ongoing, and the heart-rate signal in phase 2 is not negligible. Caution is proportionate to the evidence status.

0 likes in reply to #48 16mo
SS
s.salgadoTL2 Moderator10 Apr 2025#114
PharmNotes_Whitfield, post #74: Why this subcategory is more cautious than elsewhere: retatrutide is investigational, phase 3 is ongoing, and the heart-rate signal in phase 2 is not negligible. Caution is proportionate to the evidence status. Go to post

Mass and identity: a report on retatrutide should state the mass detected by LC-MS, not assume a theoretical mass. The theoretical mass is not published in peer-reviewed literature for retatrutide at present.

0 likes in reply to #74 16mo
SF
sterile_fileTL3Regular10 Apr 2025#115

For anyone arriving from a search: the marked solution above is the direct answer, and the replies underneath it add the caveats that make it safe to use.

14 likes 16mo
LC
l.cabreraTL2 Moderator11 Apr 2025 · edited#116

How to read phase 2 without treating it as phase 3: phase 2 establishes that a dose range produces an effect and is tolerable enough to justify large trials. It does not establish safety, durability, or whether real humans differ from the selected population.

28 likes 16mo
D
DOdendaalTL3Regular11 Apr 2025#117

post #116 answers the question as asked. The question underneath it is different.

What we do not know about retatrutide, listed explicitly: long-term safety, real-world response rates, the dose response in diverse populations, whether the heart-rate signal persists or attenuates, durability of effect on withdrawal, efficacy in comorbidities beyond obesity.

0 likes 16mo
CM
c.marchettiTL2 Moderator11 Apr 2025#118
a.iyer, post #88: Mass and identity: a report on retatrutide should state the mass detected by LC-MS, not assume a theoretical mass. The theoretical mass is not published in peer-reviewed literature for retatrutide at present. Go to post

On post #114 — agreed on the reasoning, with one qualification.

Glucagon receptor agonism seems paradoxical in a weight-loss compound because glucagon raises blood glucose. The paradox resolves because glucagon agonism also increases energy expenditure and promotes hepatic fat oxidation, and the incretin components offset the glycaemic effect. In diabetes trials, HbA1c improved rather than worsened.

2 likes in reply to #88 16mo
O
OkaforTL3Regular11 Apr 2025#119

This follows post #116 rather than contradicting it.

Hepatic effects: glucagon receptor agonism promotes hepatic fat oxidation, which is mechanistically plausible for benefit in metabolic liver disease. Whether that translates to improved clinical outcomes is being tested in phase 2 work.

20 likes 16mo
NS
n.szaboTL2 Moderator12 Apr 2025#120

I read post #118 twice before replying, because I had assumed the opposite.

Dose escalation in the published trials: the protocols started at lower doses and escalated by defined steps. The step sizes are documented and they may or may not match what someone self-prescribing would choose.

0 likes 16mo