Retatrutide vs Melanotan II
A comprehensive, data-driven comparison of Retatrutide (LY3437943) and Melanotan II (MT-2). Compare efficacy, side effects, costs, FDA approval status, and clinical evidence to make an informed decision.
Side-by-Side Comparison
| Property | Retatrutide LY3437943 | Melanotan II MT-2, Melanotan 2 |
|---|---|---|
| FDA Status | Phase 3 (NDA expected late 2026) | Not submitted |
| Category | Weight Loss | Sexual Health |
| Primary Use | Obesity and weight management | Tanning and sexual dysfunction (research) |
| Weight Loss % | 28.7% | N/A |
| Monthly Cost | $1,200 - $1,500/mo | $30 - $60/mo |
| Administration | Subcutaneous injection | Subcutaneous injection |
| Typical Dose | 12mg weekly (dose escalated from 2mg) | 0.25-1mg 2-3x per week |
| Frequency | Weekly | As needed |
| Mechanism | Triple agonist targeting GIP, GLP-1, and glucagon receptors to enhance insulin secretion, reduce appetite, and increase energy expenditure | Melanocortin receptor agonist that stimulates melanogenesis for tanning and has effects on sexual arousal |
| Common Side Effects |
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| Serious Side Effects |
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| Evidence Quality | High | Low |
| Clinical Trial Phase | Phase 3 | N/A |
Key Differences
- 1Retatrutide has clinical weight loss data (28.7%), while Melanotan II is not primarily indicated for weight loss.
- 2Melanotan II is generally more affordable ($30 - $60/mo) compared to Retatrutide ($1,200 - $1,500/mo).
- 3Retatrutide is dosed weekly, while Melanotan II is as needed.
- 4Retatrutide has high-quality evidence, while Melanotan II has low-quality evidence.
- 5They belong to different categories: Retatrutide (Weight Loss) vs Melanotan II (Sexual Health).
Which Is Better For...
Melanotan II
More budget-friendly option with lower monthly costs
Melanotan II
More convenient dosing schedule (as needed)
Melanotan II
Fewer commonly reported side effects
Retatrutide
Stronger clinical evidence base to support its use
Cost Comparison
| Peptide | Monthly Cost Range | FDA Status | Manufacturer |
|---|---|---|---|
| Retatrutide | $1,200 - $1,500/mo | Phase 3 (NDA expected late 2026) | Eli Lilly |
| Melanotan II | $30 - $60/mo | Not submitted | Various research labs |
Prices are estimated monthly costs and may vary based on pharmacy, insurance coverage, and manufacturer assistance programs. Costs for non-FDA-approved peptides reflect research compound pricing.
Frequently Asked Questions
Retatrutide works via Triple agonist targeting GIP, GLP-1, and glucagon receptors to enhance insulin secretion,. Melanotan II works via Melanocortin receptor agonist that stimulates melanogenesis for tanning and has effects on. They differ in FDA approval status, efficacy data, and cost.
Retatrutide has demonstrated 28.7% average weight loss in clinical trials. Melanotan II is not primarily used for weight loss.
Retatrutide typically costs $1,200 - $1,500/mo, while Melanotan II costs $30 - $60/mo. Prices may vary by pharmacy, insurance coverage, and manufacturer programs.
Retatrutide is not FDA-approved (Phase 3 (NDA expected late 2026)). Melanotan II is not FDA-approved (Not submitted). FDA approval indicates the treatment has met rigorous safety and efficacy standards.
Common side effects of Retatrutide include Nausea, Diarrhea, Vomiting. Common side effects of Melanotan II include Nausea, Flushing, Spontaneous erections. Always consult a healthcare provider about potential side effects.
Switching between peptide therapies should only be done under the guidance of a qualified healthcare provider. They can evaluate your medical history, current response, and determine the safest transition protocol.
Learn More
Retatrutide is a novel triple-receptor agonist developed by Eli Lilly currently in Phase 3 clinical trials. It has demonstrated unprecedented weight loss results, with patients losing an average of 28...
View Full Retatrutide GuideMelanotan II is a synthetic analog of alpha-melanocyte stimulating hormone that binds to melanocortin receptors. Originally developed for skin tanning protection against UV damage, it was found to hav...
View Full Melanotan II GuideOther Popular Comparisons
Medical Disclaimer
The information provided on this page is for educational and informational purposes only and does not constitute medical advice. This comparison between Retatrutide and Melanotan II should not be used as a substitute for professional medical guidance. Always consult a qualified healthcare provider before starting, stopping, or modifying any peptide therapy. Clinical data cited may be from ongoing trials and is subject to change. Individual results may vary significantly. PeptideVS does not endorse, recommend, or promote the use of any specific peptide for medical treatment.