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 TB-500 is studied for enhancing musculoskeletal and cardiac repair, wound healing, and promoting cell migration and differentiation via actin cytoskeleton remodeling21255, Thymosin Alpha-1 is clinically used in some countries as an immunomodulator for chronic hepatitis B/C and as an adjuvant in cancer therapy, enhancing cell-mediated immunity41487.
While TB-500 works as a synthetic peptide comprising the LKKTETQ actin-binding motif of thymosin beta-4 that binds G-actin, sequesters actin monomers, and promotes cell migration, angiogenesis, and tissue repair1255, Thymosin Alpha-1 is a 28-amino-acid thymic peptide fragment of prothymosin alpha that activates dendritic cells and T cells primarily via TLR9/MyD88/NF-κB signaling, enhancing Th1 responses and NK-cell cytotoxicity414.
TB-500
TMSB4X
Thymosin Alpha-1
PTMA
TB-500 and Thymosin Alpha-1 sit closest together within the Thymosin family, which gives them a broadly related biological identity. Their typical research and application settings separate fairly clearly: TB-500 is more often discussed in the realm of Musculoskeletal health and Cardiovascular health, whereas Thymosin Alpha-1 is more often associated with the realm of Immunology and inflammation and Oncology. Both appear to work through Signaling modulator, but the functional emphasis still separates, with TB-500 leaning toward Tissue repair and healing and Angiogenesis modulation and Thymosin Alpha-1 leaning toward Immune regulation. TB-500 has a more synthetic analog origin, while Thymosin Alpha-1 is closer to natural endogenous background and their development context also differs, with TB-500 in Preclinical development while Thymosin Alpha-1 is approved. Thymosin Alpha-1 incorporates acetylation features that are not part of TB-500.