Understand the source comparison
How to Use Peptides for Tanning: Research Protocol Comparison
Mechanism Linear MC1R agonist. Selective binding to melanocortin-1 receptor only Cyclic peptide. Binds MC1R, MC3R, MC4R (broader receptor activation) UV-induced DNA damage triggers p53-mediated melanogenesis MT-I is more selective; MT-II's multi-receptor bindi
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- Mechanism
- Linear MC1R agonist. Selective binding to melanocortin-1 receptor only
- Cyclic peptide. Binds MC1R, MC3R, MC4R (broader receptor activation)
- UV-induced DNA damage triggers p53-mediated melanogenesis
- MT-I is more selective; MT-II's multi-receptor binding causes off-target effects (libido, appetite suppression)
- Dosing Range
- 0.25–1.0mg subcutaneous per injection
- 15–30 minutes moderate UV exposure 3× weekly
- Peptide doses measured in micrograms are effective; UV requires cumulative exposure over weeks
- Onset of Pigmentation
- 5–7 days at therapeutic dose
- 3–5 days at therapeutic dose
- 7–14 days with consistent UV exposure
- Peptides accelerate melanogenesis timeline by bypassing UV-damage signaling cascade
- Adverse Event Profile
- Nausea (10–15%), injection site reaction, darkening of moles
- Nausea (25–40%), facial flushing, spontaneous erections (males), appetite suppression
- Sunburn, photoaging, cumulative DNA damage, melanoma risk
- MT-II's MC4R binding causes CNS-mediated side effects absent in MT-I; UV carries long-term cancer risk
- Duration of Effect
- Pigmentation fades over 30–60 days post-cessation
- Tan fades within 28 days without continued UV exposure
- All three require ongoing stimulus (peptide or UV) to maintain pigmentation