New — Free Peptide Starter Guide (2026): 13 chapters, 34 cited studies

Get it free
ToolsCompareMelanotan 1 vs Mazdutide

Melanotan 1 vs Mazdutide

Side-by-side comparison of key properties, dosing, and research.

Skin & CosmeticSexual Health & Libido
Melanotan 1
GLP-1 / Weight Loss Agonists
Mazdutide
Summary
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.
Mazdutide is a once-weekly GLP-1/glucagon dual receptor agonist developed by Innovent Biologics and Eli Lilly. Phase 2 trials in Chinese populations demonstrated up to 11.3% body weight reduction at 6 mg over 24 weeks. It also improves liver fat, glycemic control, and lipid profiles. Phase 3 trials are ongoing primarily in China.
Half-Life
~40–60 minutes (free peptide); implant formulation (SCENESSE) releases over months
~7 days
Admin Route
SubQ
SubQ
Research
Typical Dose
0.5–1 mg
1.5 mg → 3 mg → 4.5 mg → 6 mg
Frequency
Daily until desired color achieved, then maintenance
Once weekly
Key Benefits
  • 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
  • Up to 11.3% body weight reduction at 24 weeks (Phase 2, 6 mg dose)
  • Significant reduction in liver fat content (NAFLD/MASH potential)
  • Improves HbA1c and fasting glucose in type 2 diabetes
  • Favorable lipid profile changes (reduced triglycerides)
  • Once-weekly subcutaneous dosing
  • Potential for superior weight loss vs GLP-1 monotherapy
Side Effects
  • Nausea (especially at higher doses)
  • Facial flushing
  • Fatigue
  • Injection site reactions
  • +3 more
  • Nausea
  • Vomiting
  • Decreased appetite
  • Diarrhea
  • +3 more
Stacks With