GCG and type 2 diabetes mellitus: Semaglutide is a long-acting GLP-1RA agent used once weekly to improve glycemic control in patients with T2DM.115 Compared with the structure of human GLP-1(7-37), the amino acid sequence of semaglutide contains diaminoisobutyric acid at position 8, arginine at position 34, and acylated lysine at position 26.31 Semaglutide has a longer aliphatic chain and increased hydrophobicity, but its hydrophilicity is greatly enhanced by PEG modification of the short chain.