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 Epitalon is reported to increase lifespan and reduce tumor incidence in animals, and to influence differentiation of neural and mesenchymal stem cells; is studied as an epigenetic regulatory peptide36, Retatrutide is an investigational agent that produces very large body-weight reductions in early trials by simultaneously engaging GLP-1R, GIPR, and GCGR to enhance satiety, energy expenditure, and glycemic control2575.
While Epitalon works as a synthetic tetrapeptide, Ala-Glu-Asp-Gly (AEDG), that has been shown to bind histones and modulate gene expression and chromatin state, with reported effects on pineal function, neurogenesis, and longevity in animal models36, Retatrutide is a triple incretin agonist peptide derived from a GIP backbone and engineered to activate GLP-1, GIP, and glucagon receptors, with non-natural residues and fatty-acid conjugation that confer long half-life and balanced multi-receptor signaling256575.
Epitalon
Not assigned in the current dataset.
Retatrutide
Not assigned in the current dataset.
Epitalon and Retatrutide are noticeably different, with limited direct overlap in their usual biological context. Their typical research and application settings separate fairly clearly: Epitalon is more often discussed in the realm of Aging and longevity, whereas Retatrutide is more often associated with the realm of Metabolic and endocrine. Their biological logic is quite different: Epitalon is a signaling modulator and a gene expression modulator, whereas Retatrutide is a receptor agonist and a hormone analog. Both are synthetic in origin with Epitalon approved for Research use only and Retatrutide in Clinical phase 3. Epitalon takes the form of a linear peptide, whereas Retatrutide is closer to a peptide conjugate, while Retatrutide incorporates lipidation features that are not part of Epitalon.