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, 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 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, 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.
Humanin
MT-RNR2
Thymosin Beta-4
TMSB4X
The clearest overlap between Humanin and Thymosin Beta-4 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 Thymosin Beta-4 is better described as a signal peptide and Cytokine 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 Thymosin Beta-4 leaning toward Tissue repair and healing and Angiogenesis modulation. Humanin has a more mitochondrial-encoded origin, while Thymosin Beta-4 is closer to natural endogenous background with Humanin in Preclinical development and Thymosin Beta-4 in Clinical phase 2. Thymosin Beta-4 incorporates acetylation features that are not part of Humanin, while their sequence patterns also diverge, with Humanin showing alpha-helical domain features and Thymosin Beta-4 showing protein-mimetic sequence features.