Incretins are not just metabolic hormones that regulate glucose levels after eating. Their functions go beyond stimulating the release of insulin from the pancreas. Glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), the two main incretins, have receptors and effects in different organs, including the heart, brain, bone and kidneys. Even if they do not directly play those keys, other organs such as the liver and muscle receive signals from the same score and join the orchestra.