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 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 effects111, GHK-Cu acts as a tissue-remodeling and wound-healing signal, enhancing skin regeneration, angiogenesis, and repair while reducing inflammation and oxidative damage in experimental models31383.
While BPC-157 works as a synthetic 15-amino-acid fragment of a gastric cytoprotective protein that promotes angiogenesis and tissue protection primarily by modulating VEGFR2 signaling, Src/caveolin-1–dependent eNOS activation, and nitric oxide production111, GHK-Cu is an endogenous tripeptide, Gly-His-Lys, that chelates Cu²⁺ and modulates gene expression, stimulating collagen, elastin, proteoglycan, and glycosaminoglycan synthesis while exerting antioxidant and anti-inflammatory effects31383.
BPC-157
VEGFR2 (vascular endothelial growth factor receptor 2) on endothelial cells, with downstream eNOS and nitric-oxide–mediated signaling11
GHK-Cu
Not clearly established in the current dataset.
BPC-157
Not assigned in the current dataset.
GHK-Cu
Not assigned in the current dataset.
Both peptides fall into a similar broad context as Signal peptides, although the details of how they are used and discussed still diverge. Both are often discussed in Dermatology and aesthetics contexts, while BPC-157 is more of a signal peptide and GHK-Cu is better described as a matrikine. Both appear to work through Signaling modulator, but the functional emphasis still separates, with BPC-157 leaning toward Angiogenesis modulation and Anti-inflammatory and GHK-Cu leaning toward Collagen and elastin stimulation and Antioxidant activity. BPC-157 has a more synthetic analog origin, while GHK-Cu is closer to natural endogenous background and their development context also differs, with BPC-157 in Preclinical development while GHK-Cu is cosmetic grade. Their sequence patterns also diverge, with BPC-157 showing proline-rich features and GHK-Cu showing protein-mimetic sequence features.