P21 vs Melanotan 1
Side-by-side comparison of key properties, dosing, and research.
Cognitive EnhancementAnti-Aging & Longevity
P21Skin & CosmeticSexual Health & Libido
Melanotan 1- Summary
- P21 is a synthetic peptide derived from CNTF (ciliary neurotrophic factor) that promotes hippocampal neurogenesis, enhances memory and spatial learning, and may reduce amyloid-beta pathology. It is used as a neurogenic and cognitive enhancer with potential anti-Alzheimer's applications.
- Melanotan 1 (Afamelanotide) is a synthetic analog of α-MSH that selectively stimulates melanogenesis (tanning) through MC1R activation. It provides UV-independent skin pigmentation and is FDA/EMA-approved under the name SCENESSE for erythropoietic protoporphyria (EPP) and vitiligo.
- Half-Life
- Not well characterized; likely short, but neurogenic effects persist long after administration
- ~40–60 minutes (free peptide); implant formulation (SCENESSE) releases over months
- Admin Route
- SubQ, Intranasal
- SubQ
- Research
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- Typical Dose
- 100–500 mcg
- 0.5–1 mg
- Frequency
- Once daily
- Daily until desired color achieved, then maintenance
- Key Benefits
- Promotes hippocampal neurogenesis
- Enhances spatial memory and learning
- Increases BDNF expression
- Reduces amyloid-beta plaque formation (animal models)
- Anti-tau pathology potential
- Cognitive enhancement without stimulant effects
- Potential therapeutic for Alzheimer's and cognitive aging
- Induces skin pigmentation/tanning without UV exposure
- Provides photoprotection in photosensitivity conditions (EPP)
- FDA-approved for erythropoietic protoporphyria (SCENESSE)
- Approved in EU for EPP treatment
- Anti-inflammatory via MC1R
- Mild libido enhancement
- Potential skin cancer prevention through melanin protection
- Side Effects
- Generally well tolerated in animal studies
- Limited human clinical data
- Injection site reactions
- Potential mild fatigue at initiation
- Nausea (especially at higher doses)
- Facial flushing
- Fatigue
- Injection site reactions
- +3 more
- Stacks With
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