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 Humanin exerts neuroprotective and cytoprotective effects in models of Alzheimer’s disease, ischemia, and metabolic stress, reducing apoptosis and improving cell survival7136141, TB-500 is studied for enhancing musculoskeletal and cardiac repair, wound healing, and promoting cell migration and differentiation via actin cytoskeleton remodeling21255.
While Humanin works as a mitochondrial-derived 24-amino-acid peptide that protects cells against diverse apoptotic insults by interacting with cell-surface cytokine receptor complexes and intracellular targets, thereby activating pro-survival STAT3 and other pathways7136141, TB-500 is 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.
Humanin
TB-500
Binds monomeric actin (G-actin) rather than a classical cell-surface receptor, modulating actin polymerization at barbed and pointed ends55
Humanin
MT-RNR2
TB-500
TMSB4X
The clearest overlap between Humanin and TB-500 is that both converge around Signaling modulator. Both are often discussed in Cardiovascular health contexts, while Humanin is more of a mitochondrial peptide and Neuropeptide and TB-500 is better described as a signal peptide. Both appear to work through Signaling modulator, but the functional emphasis still separates, with Humanin leaning toward Neuroprotection and cognition and Mitochondrial function modulation and TB-500 leaning toward Tissue repair and healing and Angiogenesis modulation. Humanin has a more mitochondrial-encoded origin, while TB-500 is closer to synthetic analog background and both are still best understood as being in Preclinical development. Their sequence patterns also diverge, with Humanin showing alpha-helical domain features and TB-500 showing protein-mimetic sequence features.