Peptide Research Index
⚠️ Educational only · Not medical advice · Consult a doctor · Most peptides are research-only / not FDA-approved for human use
⚠️ Educational only · Not medical advice · Consult a doctor · Most peptides are research-only / not FDA-approved for human use
Also: LY3437943
Triple Agonist (GLP-1/GIP/Glucagon)Last Updated: April 1, 2026
Retatrutide (also known as LY3437943) is a prominently researched experimental compound classified strictly within the Triple Agonist (GLP-1/GIP/Glucagon) framework. Operating primarily through advanced pharmacological pathways, it functions by multi-receptor activation for appetite suppression, fat oxidation, energy expenditure. Unique triple agonism at GLP-1, GIP, and glucagon receptors delivers synergistic metabolic effects unmatched by single or dual agonists. with a documented biological half-life of roughly 120 hours, in preclinical investigative trials and independent academic studies, researchers utilizing Retatrutide have documented significant, quantifiable biological outcomes, primarily focusing on superior body recomposition, massive fat loss, metabolic health. Typical research protocols investigate administering 2000 to 2000mcg via subq pathways 1x/wk. However, it is critically important to understand that while Retatrutide demonstrates profound physiological potential in highly controlled laboratory settings, it remains classified strictly as a research chemical and has not been approved by the United States Food and Drug Administration (FDA) for human therapeutic, diagnostic, or dietary consumption. Independent chemical analysis via rigorous third-party Certificate of Analysis (COA) testing utilizing High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) remains the industry gold standard for verifying its base elemental stability when reconstituted appropriately in sterile bacteriostatic water.
Multi-receptor activation for appetite suppression, fat oxidation, energy expenditure. Unique triple agonism at GLP-1, GIP, and glucagon receptors delivers synergistic metabolic effects unmatched by single or dual agonists.
Jastreboff et al. (NEJM): Phase 2 RCT showing 24.2% body weight reduction at 12mg dose over 48 weeks the highest reported weight loss in any obesity drug trial to date.
strongFirst-in-human Phase 1 trial demonstrating dose-dependent weight loss, favorable safety profile, and significant HbA1c reductions across multiple dose levels.
moderatePhase 2 sub-study showing retatrutide significantly reduces liver fat content, with ~90% of participants with baseline steatosis achieving resolution at 48 weeks.
strongReview of the triple agonism mechanism: GLP-1 provides appetite suppression, GIP enhances GH-like metabolic effects, and glucagon drives energy expenditure and hepatic lipid oxidation.
moderateGI side effects (nausea, diarrhea) common; investigational not FDA-approved as of 2026. Phase 3 TRIUMPH trials ongoing.
⚠️ For educational purposes only. Not medical advice. Consult a healthcare professional before using any peptide.
Investigational. Phase 2 doses: 1-12mg weekly with dose escalation. Not commercially available.
Last updated: 2026-01 · Laws change frequently. Verify current status in your jurisdiction.
Week 1
GI adjustment; nausea during dose escalation
Weeks 2-4
Rapid appetite reduction; early weight loss 1-2 lbs/week
Month 2-3
10-15% body weight reduction at therapeutic dose
Long-term
Up to 24.2% weight loss at 48 weeks (NEJM Phase 2 trial, 12mg dose)
| Side Effect | Incidence | Severity |
|---|---|---|
Nausea From Phase 2 trial; most pronounced during escalation | ~45% of users | moderate |
Diarrhea | ~25% of users | mild |
Vomiting | ~20% of users | moderate |
Constipation | ~20% of users | mild |
Incidence rates sourced from published clinical trial data where available; otherwise based on community research observations.
Finding verified, high-purity Retatrutide requires rigorous COA verification. We independently evaluate vendors based on third-party HPLC testing, purity thresholds (≥98%), and batch-specific documentation.
View COA-Verified Retatrutide✓ Third-party tested·✓ US shipping·✓ COA on every batch
Disclosure: PeptiDex may earn a commission from purchases made through affiliate links. This does not affect our editorial independence or recommendations. We exclusively feature vendors that pass our strict quality verification protocols.
Maximum fat loss through targeted metabolic optimization and direct adipose tissue mobilization
PeptiDex. (2026). Retatrutide. PeptiDex Research Platform. https://peptidex.app/library/retatrutide
12 stacks • exact dosages • cycle lengths • printable reference
No spam. Unsubscribe anytime.