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 Matrixyl is a widely used cosmetic peptide with evidence of stimulating extracellular matrix synthesis and reducing wrinkle appearance in skin-care formulations48, Thymosin Beta-4 promotes wound healing, angiogenesis, and tissue regeneration in preclinical models via effects on cytoskeleton dynamics, cell migration, and anti-apoptotic pathways25579.
While Matrixyl works as a palmitoylated pentapeptide, Pal-Lys-Thr-Thr-Lys-Ser (Pal-KTTKS), that acts as a matrikine, signaling to dermal fibroblasts to increase production of collagen, elastin, fibronectin, and other ECM components4858, Thymosin Beta-4 is an endogenous 43-amino-acid actin-sequestering peptide that maintains a pool of G-actin monomers and regulates actin polymerization, thereby influencing cell migration, proliferation, and differentiation25579.
Matrixyl
Not clearly established in the current dataset.
Thymosin Beta-4
Binds actin monomers (G-actin) at both barbed and pointed ends to sterically block polymerization55
Matrixyl
Not assigned in the current dataset.
Thymosin Beta-4
TMSB4X
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 Matrixyl is more of a matrikine and Thymosin Beta-4 is better described as a cytokine peptide. Their biological logic is quite different: Matrixyl is a matrix remodeling modulator, whereas Thymosin Beta-4 is a signaling modulator and a protein interaction inhibitor. Matrixyl has a more synthetic design origin, while Thymosin Beta-4 is closer to natural endogenous background and their development context also differs, with Matrixyl cosmetic grade while Thymosin Beta-4 is in Clinical phase 2. Matrixyl takes the form of a peptide conjugate, whereas Thymosin Beta-4 is closer to a linear peptide, while Matrixyl carries palmitoylation features, while Thymosin Beta-4 instead reflects acetylation changes.