Cagrilintide vs Retatrutide.
Quick Verdict
Cagrilintide is a metabolic primarily researched for weight loss, appetite reduction, glycemic control, while Retatrutide is a triple agonist (glp-1/gip/glucagon) studied for superior body recomposition, massive fat loss, metabolic health. A key distinction: Retatrutide has FDA approval status.
Side-by-Side Analysis
| Dimension | Cagrilintide | Retatrutide |
|---|---|---|
| Category | Metabolic | Triple Agonist (GLP-1/GIP/Glucagon) |
| Mechanism | Long-acting amylin analog that activates amylin receptors in the area postrema and hypothalamus to reduce appetite, slow gastric emptying, and suppress post-meal glucagon secretion. | Multi-receptor activation for appetite suppression, fat oxidation, energy expenditure. |
| Half-Life | ~7 days | ~6 days |
| Route | SubQ | SubQ |
| Typical Dose | 500–4500 mcg | 2000–2000 mcg |
| Frequency | Weekly | 1x/wk |
| Evidence Level | Strong | Strong |
| Indexed Studies | 20+ indexed | 20+ indexed |
| FDA Status | Research Only | Approved |
| Lowest Price | $69.99 / 10mg via Amino Club | $69.99 / 10mg via Amino Club |
| Per-mg Cost | $7.00/mg | $7.00/mg |
Mechanism of Action Comparison
How Cagrilintide Works
Cagrilintide Cagrilintide is a long-acting amylin analog investigated for weight loss, studied in Phase 2 trials for achieving over 10% body weight reduction when combined with semaglutide.
Long-acting amylin analog that activates amylin receptors in the area postrema and hypothalamus to reduce appetite, slow gastric emptying, and suppress post-meal glucagon secretion. Works on a distinct pathway from GLP-1 agonists, making it ideal for combination therapy.
How Retatrutide Works
Retatrutide Retatrutide is an investigational triple GLP-1/GIP/glucagon receptor agonist studied in Phase 2 trials, producing the highest weight loss ever recorded in an obesity drug trial at 24%.
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.
Key Mechanistic Difference
Cagrilintide operates as a metabolic, while Retatrutide functions as a triple agonist (glp-1/gip/glucagon) — these are fundamentally different pharmacological approaches.
Research Evidence
Cagrilintide
20 studies- Cagrilintide Phase 2 trial for weight managementLau et al. (Lancet): Phase 2 RCT showing cagrilintide 4.5mg weekly achieved 10.8% weight loss vs 3.0% placebo at 26 week…Strong
- CagriSema (cagrilintide + semaglutide) Phase 2 resultsFrias et al. (Lancet): CagriSema combination achieved 15.6% weight loss at 32 weeks in type 2 diabetes patients — superi…Strong
- Amylin analogs in obesity management: mechanism reviewReview of amylin's role in energy homeostasis and why dual amylin-calcitonin receptor agonists like cagrilintide represe…Moderate
Retatrutide
20 studies- Retatrutide Phase 2 trial: ~24% weight loss at 48 weeksJastreboff et al. (NEJM): Phase 2 RCT showing 24.2% body weight reduction at 12mg dose over 48 weeks the highest repor…Strong
- Retatrutide Phase 1 safety and dose-dependent weight lossFirst-in-human Phase 1 trial demonstrating dose-dependent weight loss, favorable safety profile, and significant HbA1c r…Moderate
- Retatrutide reduces liver fat (MASLD Phase 2a sub-study)Randomized Phase 2a sub-study (n=98, Nature Medicine 2024): retatrutide 12mg achieved 82.4% relative liver fat reduction…Strong
Vendor Pricing
· Affiliate links · Prices verified 2026Cagrilintide
2 vendorsRetatrutide
1 vendorAffiliate disclosure: PeptiDex may earn a commission from purchases via vendor links at no extra cost to you. See our methodology.
Frequently Asked Questions
Can I take Cagrilintide and Retatrutide together?▼
Use caution. Cagrilintide and Retatrutide have overlapping mechanisms that may require careful dosing adjustment when used concurrently. Consult published research protocols before combining.
Which has more research evidence — Cagrilintide or Retatrutide?▼
Cagrilintide has 20 indexed studies (highest evidence: Strong). Retatrutide has 20 indexed studies (highest evidence: Strong). Both have comparable research coverage.
What is the price difference between Cagrilintide and Retatrutide?▼
At current verified vendor prices, Retatrutide starts at $7.00/mg while Cagrilintide starts at $7.00/mg. Prices vary by vendor and vial size — see the full vendor comparison below.
Which is better for fat loss — Cagrilintide or Retatrutide?▼
Both are researched for fat loss. Cagrilintide addresses this via weight loss, appetite reduction, glycemic control. Retatrutide approaches it through superior body recomposition, massive fat loss, metabolic health. The optimal choice depends on your specific research protocol and which mechanism aligns with your objectives.
Is Cagrilintide or Retatrutide FDA-approved?▼
Retatrutide has FDA approval (or is derived from an FDA-approved compound). Cagrilintide is a research compound without FDA approval for human use. FDA status reflects regulatory evaluation — not necessarily superiority for all research applications.
Related Comparisons
Deep Dive Profiles
Research Use Only — Not Medical Advice
This comparison is provided for educational and research purposes only. It does not constitute medical, prescribing, or treatment advice. Clinical data cited here is sourced from published peer-reviewed trials and FDA labels. Consult a qualified healthcare professional before making any decisions about medications or research compounds. PeptiDex is an informational resource and does not sell pharmaceutical products.