Acetyl tetrapeptide-5
is used in cosmetic eye formulations to decrease puffiness, eye bags, and dark circles by reducing edema and protecting proteins such as SOD from glycation
Alanine
Ala / A · hydrophobic residue · neutral charge
AOD-9604
is studied as an anti-obesity peptide that can reduce weight gain and increase fat oxidation in obese animal models with generally neutral effects on IGF-1 and glucose metabolism in early human trials
Arginine
Arg / R · basic residue · positive charge
Argireline
is a topical cosmetic peptide reported to decrease dynamic wrinkles by partially mimicking the mechanism of botulinum toxin in a non-invasive manner
Asparagine
Asn / N · polar residue · neutral charge
Aspartic acid
Asp / D · acidic residue · negative charge
BPC-157
is investigated for accelerating healing of gastrointestinal mucosa, tendons, ligaments, bone, and nervous tissue in preclinical models, with anti-inflammatory and pro-angiogenic effects
Comparison
While Melanotan II is studied as a tanning and libido-enhancing agent; increases melanin production and can reduce food intake and modulate sexual arousal in animal models and humans3545, Setmelanotide is approved for chronic weight management in patients with POMC, PCSK1, LEPR deficiencies and Bardet–Biedl syndrome by reducing hunger and promoting weight loss92.
While Melanotan II works as a cyclic heptapeptide melanocortin analog (Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2) that acts as a non-selective, high-potency agonist at MC1R, MC3R, MC4R, and MC5R, influencing pigmentation, appetite, and sexual behavior3545, Setmelanotide is a potent synthetic melanocortin-4 receptor (MC4R) agonist derived from a POMC/α-MSH–related sequence that restores downstream MC4R signaling in genetic obesity syndromes3192100.
Melanotan II
POMC
Setmelanotide
POMC
Melanotan II and Setmelanotide sit closest together within the Melanocortin family, which gives them a broadly related biological identity. Their typical research and application settings separate fairly clearly: Melanotan II is more often discussed in the realm of Dermatology and aesthetics and Reproductive health, whereas Setmelanotide is more often associated with the realm of Metabolic and endocrine. Mechanistically, both point toward Receptor agonist and converge on Melanocortin receptor, although the downstream emphasis is not identical. Melanotan II has a more synthetic analog origin, while Setmelanotide is closer to synthetic design background and their development context also differs, with Melanotan II approved for Research use only while Setmelanotide is approved. Melanotan II carries acetylation features, while Setmelanotide instead reflects d-amino acid substitution changes.
No related articles are linked to these peptides yet.