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 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, TB-500 is studied for enhancing musculoskeletal and cardiac repair, wound healing, and promoting cell migration and differentiation via actin cytoskeleton remodeling21255.
While MGF works as 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, 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.
MGF
IGF1
TB-500
TMSB4X
Both peptides fall into a similar broad context as Signal peptides, although the details of how they are used and discussed still diverge. Both are most often discussed in Musculoskeletal health, which gives the comparison a meaningful common setting even when the rest of their profiles are not identical. Both appear to work through Growth factor mimetic and Signaling modulator, but the functional emphasis still separates, with MGF leaning toward Anabolic growth and TB-500 leaning toward Angiogenesis modulation and Anti-inflammatory. MGF has a more natural endogenous origin, while TB-500 is closer to synthetic analog background and both are still best understood as being in Preclinical development. Their usual administration context is also different, with MGF more often associated with intramuscular injection and TB-500 with subcutaneous injection, intravenous infusion, and topical / transdermal.