It is involved in the signaling for survival and transcription through associations with the Egr-1 transcription factor and Akt/PI3K cell survival pathway
Why it was included in the FDA ban Melanotan II was banned for reported adverse effects like melanoma skin cancers, posterior reversible encephalopathy syndrome (a seizure and headache disorder), sympathomimetic toxidrome (symptoms of poisoning), and priapism (dangerous, prolonged erections)
The speed of injection also matters
Cryo-electron microscopy studies (Li et al., 2024, Cell Discovery) revealed the peptide adopts a single continuous helix achieving balanced activation through conserved interactions and receptor-specific transmembrane domain contacts
Hormone Research , 53(6), 274-278
Zone 4/5 intervals (high-intensity intervals at 85% to 95% max heart rate) directly increase VO2 max