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 Sermorelin is used as a diagnostic agent for assessing GH secretory capacity and as a research tool or off-label therapy to increase endogenous GH in GH-deficient or age-related contexts1727, 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 Sermorelin works as a synthetic 29-amino-acid peptide identical to the 1–29 N-terminal fragment of human GHRH that stimulates GH synthesis and secretion by binding pituitary GHRH receptors1727120, 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.
Sermorelin
GHRH
Setmelanotide
POMC
The clearest overlap between Sermorelin and Setmelanotide is that both converge around Receptor agonist. Both are often discussed in Metabolic and endocrine contexts, while Sermorelin is more of a hormone peptide and Setmelanotide is better described as a metabolic peptide and Neuropeptide. Both appear to work through Receptor agonist, but the functional emphasis still separates, with Sermorelin leaning toward Anabolic growth and Setmelanotide leaning toward Metabolic regulation. Sermorelin has a more synthetic analog origin, while Setmelanotide is closer to synthetic design background. Sermorelin takes the form of a linear peptide, whereas Setmelanotide is closer to a cyclic peptide, Sermorelin carries amidation features, while Setmelanotide instead reflects d-amino acid substitution changes; while their sequence patterns also diverge, with Sermorelin showing alpha-helical domain features and Setmelanotide showing protein-mimetic sequence features.
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