Source comparison
Comparison: Melanotan 1 vs. Melanotan 2 vs. PT-141
To make this as clear as possible, our team put together a simple table to highlight the critical differences between these three related but distinct peptides. For any researcher, understanding these distinctions is a non-negotiable element of designing a val
This comparison does not assign a generated winner or score.
- To make this as clear as possible, our team put together a simple table to highlight the critical differences between these three related but distinct peptides. For any researcher, understanding these distinctions is a non-negotiable element of designing a valid study.
- Primary Receptor
- Highly selective for MC1R
- Non-selective; binds to MC1R, MC3R, MC4R, MC5R
- Selective for MC4R and MC3R
- Main Research Focus
- Photoprotection, skin pigmentation
- Tanning, sexual arousal, appetite suppression
- Sexual arousal, hypoactive sexual desire disorder (HSDD)
- Libido Enhancement
- Negligible to None. Not its mechanism of action.
- Strong. A well-documented effect via MC3R/MC4R.
- Very Strong. Its primary, targeted effect.
- Tanning Effect
- Strong. Its primary, targeted effect.
- Very Strong. Often more potent than MT-1.
- None to Minimal. Designed to avoid MC1R activation.
- Common Side Effects
- Nausea, flushing, darkening of moles
- Nausea (often more intense), flushing, yawning, appetite suppression
- Flushing, nausea (generally less than MT-2), headache
- Molecular Structure
- Linear Peptide
- Cyclic Peptide (Lactam Bridge)
- Cyclic Peptide (Metabolite of MT-2)
- This table really drives the point home. If your research goal is related to melanogenesis, Melanotan 1 is the precise tool for the job. If you're investigating the pathways of sexual arousal via the melanocortin system, your focus should be on Melanotan 2 or, for a more targeted approach, PT-141.