Source comparison
Melanotan-1 vs Melanotan-2 vs Alpha-MSH: Melanocortin Receptor Binding and Biological Activity Comparison
Understanding how Melanotan-1 works requires comparing it directly to structurally related melanotropic peptides. The table below outlines receptor selectivity, half-life, primary biological effects, and typical research applications. Alpha-MSH (endogenous) Hi
This comparison does not assign a generated winner or score.
- Understanding how Melanotan-1 works requires comparing it directly to structurally related melanotropic peptides. The table below outlines receptor selectivity, half-life, primary biological effects, and typical research applications.
- Alpha-MSH (endogenous)
- High selectivity for MC1R; minimal cross-reactivity
- <5 minutes (rapid enzymatic degradation)
- Moderate melanin induction; requires sustained elevation
- Anti-inflammatory signaling via MC1R and MC3R
- Physiological melanogenesis baseline; inflammatory research
- Melanotan-1 (afamelanotide)
- High selectivity for MC1R; <5% activity at MC3R/MC4R
- 30–120 minutes
- Potent eumelanin synthesis; 200–400% increase over baseline
- Minimal appetite or libido effects; occasional nausea and flushing
- Photoprotection studies; EPP and PLE research; dermatological trials
- Melanotan-2
- Broad-spectrum agonist; significant MC1R, MC3R, MC4R activity
- 60–180 minutes
- Potent eumelanin synthesis comparable to MT-1
- Appetite suppression, increased libido, spontaneous erections (MC4R-mediated)
- Multifunctional melanocortin research; sexual dysfunction studies
- Bottom Line
- Melanotan-1 offers the most targeted melanogenic activity with minimal off-target effects, making it the preferred choice for pigmentation-specific research. Melanotan-2's broader receptor activity produces additional metabolic and sexual side effects that complicate interpretation in melanogenesis studies.