Skip to main content
Compound
Codex
Ledger
Hubs
Tools
Guides
Bloodwork
Forum
Browse
Ledger
All hubs
GLP-1 & weight loss
SARMs
Steroids & PEDs
GH secretagogues
Healing peptides
Melanocortins
Nootropic peptides
SERMs
Aromatase inhibitors
Cosmetic peptides
Mitochondrial peptides
Women
Compare
Watchlist
Topics
Reference
Guides
The toolkit
How we grade · the Codex Scale
Changelog
Testing labs
Citations
Calculator & converter
Bloodwork analysis
Marker reference
Resources
Community
Forum
Site
Home
About
Editorial process
Standards
Contact
Search
RSS
Independent reference & toolkit
100
compounds graded · Last reviewed June 2026
topics
/ melanotan ii
Tagged melanotan ii.
6/10 · Preliminary
Melanotan II: It Tans, But It's Unapproved and Carries Real Harms
A synthetic tanning peptide that does something, but is unapproved, unregulated, and tied to serious harms from priapism to melanoma case reports.