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 GHRP-2 is used in research to induce robust GH pulses and study anabolic and metabolic effects; clinically developed as pralmorelin for GH deficiency diagnostics6272, PT-141 is FDA-approved for treatment of hypoactive sexual desire disorder in premenopausal women and is studied for sexual dysfunction in other populations, increasing sexual desire via CNS melanocortin pathways42101.
While GHRP-2 works as a second-generation hexapeptide growth hormone–releasing peptide that mimics ghrelin by agonizing GHSR-1a, strongly stimulating pulsatile GH release and modestly raising prolactin, ACTH, and cortisol62723096, PT-141 is the synthetic melanocortin receptor agonist bremelanotide, an analog of α-MSH that activates central MC3R and MC4R to modulate neuronal circuits governing sexual desire and arousal3242101.
GHRP-2
GHSR
PT-141
POMC
GHRP-2 and PT-141 are noticeably different, with limited direct overlap in their usual biological context. Their typical research and application settings separate fairly clearly: GHRP-2 is more often discussed in the realm of Metabolic and endocrine and Musculoskeletal health, whereas PT-141 is more often associated with the realm of Reproductive health. They also influence different molecular systems, with GHRP-2 tracking more closely to Ghrelin receptor while PT-141 centers more on GPCR receptor. GHRP-2 has a more synthetic design origin, while PT-141 is closer to synthetic analog background and their development context also differs, with GHRP-2 in Clinical phase 1 while PT-141 is approved. GHRP-2 takes the form of a linear peptide, whereas PT-141 is closer to a cyclic peptide, while GHRP-2 carries d-amino acid substitution and amidation features, while PT-141 instead reflects acetylation changes.
No related articles are linked to these peptides yet.