Demissie G G, Chen Y C, Ciou S Y, Hsu S H, Wang C Y, Huang C C, Chang H T, Lee Y C, Chang J Y

Semaglutide (Ozempic, Wegovy): GLP-1 receptor agonist 31-amino acid peptide Position 2: Aib substitution Position 20: Lys acylated with a C18 fatty diacid via a Glu-(AEEA-AEEA) linker Position 28: Arg substitution Tirzepatide (Mounjaro, Zepbound): Dual GIP/GLP-1 receptor agonist 39-amino acid peptide: Position 2 and 13: Aib substitution Position 20: Lys acylated with a C20 fatty diacid via a Glu-(AEEA-AEEA) linker Position 30-39: Amino acid sequence from exenatide Retatrutide: Triple GLP-1/GIP/GCG receptor agonist 39-amino acid peptide: Position 2 and 20: Aib substitution Position 13: Leucine modified with an -methyl group (2-Methylleucine) Position 17: Lys acylated with a C20 fatty diacid via a Glu-(AEEA) linker Position 30-39: Amino acid sequence from exenatide Semaglutide and Tirzepatide are widely available and well-studied, while Retatrutide's long-term effectiveness and safety profile are still being investigated in clinical trials
Acta 1861 , 18281839 (2016)
Theres no better evidence now than before the FDA made its announcement that peptides have any of the claimed effects, we don't know what they do, and there are still all the concerns about compounding pharmacies complying with good manufacturing practices that already exist, she says
PMID 26334606