Rybelsus belongs to the GLP-1 receptor agonists’ class of medications. Again, you can call it an incretin mimetic, too. Rybelsus does its job by copying the functions of some natural incretin hormones present in the body, and they help keep blood sugar levels under control, particularly immediately after a meal. When people consume food, incretin hormones, which are also known as gut peptides, are secreted. Incretin hormones stimulate insulin secretion in response to higher levels of blood sugar. A couple of incretin hormones are GLP-1 or glucagon-like peptide-1 and GIP or glucose-dependent insulinotropic polypeptide.