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Best Peptides for Tan Optimization Research: Research Compound Comparison
The table below compares the three primary melanotropic peptides used in tan optimization research based on receptor selectivity, typical research dosing, melanogenic potency, and experimental applications. This comparison helps research teams select the appro
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- The table below compares the three primary melanotropic peptides used in tan optimization research based on receptor selectivity, typical research dosing, melanogenic potency, and experimental applications. This comparison helps research teams select the appropriate compound for their specific protocol requirements.
- Melanotan II (MT-II)
- MC1R, MC3R, MC4R, MC5R (broad melanocortin activity)
- 10⁻⁷ to 10⁻⁹ M in culture; 0.5–1.0mg subcutaneous in vivo
- High (1000× alpha-MSH affinity)
- Multi-system melanocortin studies, photoprotection models, appetite/sexual function research
- Best for studies examining melanocortin receptor cross-talk or requiring simultaneous MC1R/MC4R activation
- Melanotan I (Afamelanotide)
- High MC1R selectivity (minimal MC3R/MC4R activity)
- 10⁻⁷ to 10⁻⁶ M in culture; 0.5–2.0mg subcutaneous in vivo
- Moderate-high (lower than MT-II but sustained)
- Isolated melanogenesis studies, MC1R-specific pathway research, photoprotection without systemic effects
- Preferred when eliminating MC3R/MC4R confounders or studying MC1R saturation kinetics
- Brmelanotide (PT-141)
- MC3R, MC4R (reduced MC1R activity)
- 10⁻⁷ to 10⁻⁸ M in culture
- Low (minimal melanogenic effect)
- Negative control for melanogenesis, MC3R/MC4R dissociation studies, sexual function research
- Use as negative melanogenic control when testing MC1R-independent melanocortin effects