Retatrutide
Also known as Triple-G
The next-gen triple agonist posting the biggest trial weight-loss numbers yet.
Emerging evidenceOverview
At a glance
Combining
Avoid combining with: Semaglutide, Tirzepatide
Safety
Still in trials; GI side effects expected.
Regulatory: Investigational, not yet FDA-approved.
Not appropriate if: pregnant.
Questions
How is retatrutide different from tirzepatide or semaglutide?⌄
Retatrutide hits three receptors - GLP-1, GIP, and glucagon - where tirzepatide hits two and semaglutide hits one. Adding the glucagon receptor adds energy-expenditure effects on top of appetite suppression, which is what produces the larger weight-loss numbers seen in early trials.
Is it FDA-approved?⌄
No. Retatrutide is investigational and has not yet received FDA approval. It is accessed only through supervised clinical protocols.
How is it taken?⌄
Once-weekly subcutaneous injection on the same day each week. Doses in trials have ranged from 1 to 12 mg, titrated up based on tolerability.
What side effects should I expect?⌄
GI side effects - nausea and related symptoms - are expected during titration, consistent with what is seen with other GLP-1-class agents. Because human safety data is still being collected, all protocols are closely monitored.
Who should not use retatrutide?⌄
People who are pregnant should not use it. As with all GLP-1-class agents, those with a personal or family history of medullary thyroid cancer should discuss this with their clinician before considering it.
Can I stack it with other peptides?⌄
Retatrutide cannot be combined with other GLP-1 agonists including semaglutide, tirzepatide, or liraglutide. No additional stacking partners are currently listed for it.
Want a personalized protocol?
Exact dosing is set with a licensed provider in the PepDepo network. This page is education, not a prescription.
Book a consultEducation only, not medical advice. Peptides discussed are for informational purposes and many are not FDA-approved. Eligibility, prescribing, compounding, and dispensing are handled by appropriately licensed entities. Exact protocols and dosing are set with a licensed provider in the PepDepo network at consult. Content is pending clinical review.