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Melanotan 2 vs PT-141: Tanning and Libido Research Peptides Compared (2026)
Melanotan 2 vs PT-141: Key Differences in Research Applications
Melanotan 2 (MT-2) and PT-141 (Bremelanotide) are both analogs of the melanocortin peptide family, but they serve very different research purposes. Understanding their distinct mechanisms helps researchers choose the right compound for their specific studies.
What Is Melanotan 2?
Melanotan 2 is a synthetic analog of alpha-melanocyte stimulating hormone (alpha-MSH). It is primarily studied for its effects on melanogenesis – the production of melanin that leads to skin darkening. MT-2 also interacts with melanocortin receptors involved in appetite regulation and sexual function, making it a multifaceted research compound.
What Is PT-141?
PT-141 (Bremelanotide) is a synthetic peptide derived from Melanotan 2 but modified to eliminate the melanogenesis (tanning) effect while retaining activity at the MC3 and MC4 receptors, which are implicated in sexual arousal and desire. It is studied primarily for its potential in sexual dysfunction research.
Key Differences
| Factor | Melanotan 2 | PT-141 |
|---|---|---|
| Primary effect | Skin tanning (melanogenesis) | Sexual arousal |
| Receptors | MC1, MC3, MC4, MC5 | MC3, MC4 |
| Dosing | 0.5-1 mg per cycle | 1-2 mg per study |
| Administration | Subcutaneous | Subcutaneous |
Research Considerations
Researchers studying skin pigmentation and tanning typically select Melanotan 2, while those focused on sexual function research often prefer PT-141. Both peptides require proper reconstitution and storage. Follow our reconstitution guide for best practices.
For related research topics, see our guide on peptides for sexual health and fertility.
Where to Buy
Both Melanotan 2 and PT-141 are available at Hanpro Peptides with third-party HPLC purity verification. Browse the full catalog for more research compounds.
Conclusion
Melanotan 2 and PT-141 are related but serve distinct research functions. MT-2 is the compound of choice for pigmentation studies, while PT-141 is preferred for research into sexual arousal mechanisms. Both require careful handling and protocol design.
