Its a synthetic peptide derived from a protein found in human gastric juices
Antidiabetogenic effect of glucagon-like peptide-1 (736)amide in normal subjects and patients with diabetes mellitus
Since then, more than ten types of GLP-1 receptor agonists have received FDA approval and been brought to market, and with each new version, their effectiveness has increased
Miao J, Choi SE, Seok SM, Yang L, Zuercher WJ, Xu Y, Willson TM, Xu HE, Kemper JK (2011) Ligand-dependent regulation of the activity of the orphan nuclear receptor, small heterodimer partner (SHP), in the repression of bile acid biosynthetic CYP7A1 and CYP8B1 genes
doi: 10.1007/s00011-016-0967-5 62 XiangXMaHChenYZhangDMaSWangHet al
Oral supplements sit in a near-unregulated zone where manufacturers self-certify compliance and the FDA reacts only when something goes wronga contamination event, a serious adverse reaction, or a company making disease claims so egregious they can't be ignored