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 Melanotan II is studied as a tanning and libido-enhancing agent; increases melanin production and can reduce food intake and modulate sexual arousal in animal models and humans3545, MGF is upregulated in muscle after mechanical overload, where it supports tissue repair and growth; recombinant forms are studied for regenerative and performance-enhancement effects22138.
While Melanotan II works as a cyclic heptapeptide melanocortin analog (Ac-Nle-cyclo[Asp-His-D-Phe-Arg-Trp-Lys]-NH2) that acts as a non-selective, high-potency agonist at MC1R, MC3R, MC4R, and MC5R, influencing pigmentation, appetite, and sexual behavior3545, MGF is a 24-amino-acid E-peptide splice variant of IGF-1 (IGF-1Ec) produced in mechanically stressed or damaged muscle that activates IGF1R and local anabolic pathways involved in muscle repair and hypertrophy22138144.
Melanotan II
POMC
MGF
IGF1
Melanotan II and MGF are noticeably different, with limited direct overlap in their usual biological context. Their typical research and application settings separate fairly clearly: Melanotan II is more often discussed in the realm of Dermatology and aesthetics and Reproductive health, whereas MGF is more often associated with the realm of Musculoskeletal health. Their biological logic is quite different: Melanotan II is a receptor agonist, whereas MGF is a growth factor mimetic and a signaling modulator. Melanotan II has a more synthetic analog origin, while MGF is closer to natural endogenous background with Melanotan II approved for Research use only and MGF in Preclinical development. Melanotan II takes the form of a cyclic peptide, whereas MGF is closer to a linear peptide, while Melanotan II incorporates acetylation features that are not part of MGF.
No related articles are linked to these peptides yet.