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 FOXO4-DRI acts as a senolytic in preclinical models by promoting apoptosis of senescent cells, improving tissue function and healthspan measures in aged animals38, 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 FOXO4-DRI works as a D-retro-inverso peptide derived from a FOXO4 region that competes with endogenous FOXO4 for binding to p53, thereby releasing p53 to trigger apoptosis selectively in senescent cells38, 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.
FOXO4-DRI
Intracellular target is the FOXO4–p53 protein–protein interaction interface; it does not signal via a traditional cell-surface receptor38
GHK-Cu
Not clearly established in the current dataset.
FOXO4-DRI
FOXO4
GHK-Cu
Not assigned in the current dataset.
FOXO4-DRI and GHK-Cu are noticeably different, with limited direct overlap in their usual biological context. Both are often discussed in Aging and longevity contexts, while FOXO4-DRI is more of a senolytic peptide and GHK-Cu is better described as a signal peptide and Matrikine. Their biological logic is quite different: FOXO4-DRI is a protein interaction inhibitor, whereas GHK-Cu is a gene expression modulator and a signaling modulator. FOXO4-DRI has a more synthetic design origin, while GHK-Cu is closer to natural endogenous background and their development context also differs, with FOXO4-DRI in Preclinical development while GHK-Cu is cosmetic grade. FOXO4-DRI incorporates retro-inverso isomerization features that are not part of GHK-Cu.