Description
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- First-in-Class Triple Agonist (GLP-1 + GIP + Glucagon)
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🔬 Science & Mechanism
Retatrutide activates three synergistic pathways:
- GLP-1 receptor agonism: slows digestion, boosts satiety, lowers appetite.
- GIP receptor agonism: enhances insulin secretion and glucose control.
- Glucagon receptor agonism: increases energy expenditure, mobilizing fat stores.
This “triple hit” creates greater metabolic balance and weight reduction than dual agonists.
📊 Clinical Evidence
- Phase 2 (NEJM, 2023):
- 48 weeks, n=338 obese/overweight adults (no diabetes).
- Mean loss: 24.2% body weight at 12 mg dose, vs 2.1% placebo.
- Over 90% of participants achieved ≥5% loss.
- Nature Medicine 2024:
- Liver fat content decreased by 82% at 48 weeks.
- Improvements in ALT/AST and markers of fatty liver disease.
- Meta-analysis (2024, PMC):
- Average across trials: ~14.3% weight loss, BMI reduction 5.4, waist reduction 10.5 cm, plus BP/glucose improvements.
- ADA 2024 (T2D cohort):
- 12 mg retatrutide → 16.9% loss at 36 weeks in people with type 2 diabetes.
Reconstitution & Dosing Tables (Weight Loss Peptides)
Retatrutide (10 mg vial + 2 mL BAC water)
-
Final concentration = 5 mg/mL → 50 mcg per unit (0.01 mL).
Dose |
Volume (mL) |
Syringe Units |
2 mg |
0.40 mL |
40 units |
4 mg |
0.80 mL |
80 units |
8 mg |
1.60 mL |
160 units |
12 mg |
2.40 mL (requires >1 vial) |
240 units |
💉 Dosing Guide (Educational)
Weekly SubQ Titration (Phase 2 protocol):
| Week Range | Dose (mg) |
| 1–4 | 2 mg |
| 5–8 | 4 mg |
| 9–12 | 8 mg |
| 13+ | 12 mg (max) |
- Escalation every 4 weeks as tolerated.
- Clinical trials used max dose of 12 mg weekly.
💧 Reconstitution (Example 10 mg vial)
- Add 2 mL bacteriostatic water.
- Final concentration: 1 mg = 0.2 mL (20 units).
- Example: 4 mg = 0.8 mL (80 units).
🧊 Storage
- Store lyophilized vials refrigerated (2–8 °C).
- Use within 30 days after reconstitution.
- Protect from light.
⚠️ Disclaimer
- For educational purposes only.
- Not yet FDA or Health Canada approved outside clinical trials.
- Customers assume responsibility for safe handling and research use.
❓ FAQ
Is this stronger than Tirzepatide?
Yes. Phase 2 trials suggest up to ~24% weight loss at 48 weeks, surpassing Tirzepatide’s ~21% at 72 weeks.
Is this available now?
Retatrutide is in advanced clinical trials and not yet widely commercialized. This is a research-grade peptide for educational exploration.
What about long-term safety?
Data is early; most common side effects are GI (similar to other GLP-1s). Ongoing studies are monitoring safety in obesity and diabetes cohorts.
📚 References
- NEJM Phase 2 Trial (48 weeks, 24.2% loss at 12 mg)
🔗 https://www.nejm.org/doi/full/10.1056/NEJMoa2301972 - Nature Medicine — Liver fat & metabolic improvements
🔗 https://www.nature.com/articles/s41591-024-03018-2 - Wikipedia — Retatrutide overview
🔗 https://en.wikipedia.org/wiki/Retatrutide - PMC Meta-Analysis — weight, BMI, waist, glucose, BP outcomes
🔗 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12026077/ - ADA Symposium (T2D data, 16.9% loss at 36 weeks)
🔗 https://www.diabetes.org/newsroom/american-diabetes-association-highlights-novel-agent-retatrutide-results-substantial-weight-reduction-people-with-obesity-type-2-diabetes-during-late-breaking-symposium - Business Insider — pipeline “triple agonist” GLP-1 drugs
🔗 https://www.businessinsider.com/upcoming-glp1-weight-loss-drugs-to-watch-2024-11 - Wikipedia GLP-1/GIP/Glucagon poly-agonists
🔗 https://en.wikipedia.org/wiki/GLP1_poly-agonist_peptides





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