GLP1R and type 2 diabetes mellitus: Recently, we described allosteric optical control of the glucagon‐like peptide‐1 receptor (GLP‐1R),3 a prototypical class B GPCR involved in the maintenance of blood glucose levels and a blockbuster target for type 2 diabetes treatment.4 As peptide ligands that target the GLP‐1R must be injected, the development of orally available small‐molecule GLP‐1R activators is a priority.