INS and diabetes mellitus: Furthermore, another recent study [20] indicates that, in a model of multiple low dose STZ‐induced diabetes, GLP‐1 (based on a meta‐analysis), insulin and GABA‐induced α and ß cell proliferation and α‐ to ß‐cell trans‐differentiation, whereas the proliferation ratio of ß cell/α cell increased only in GABA treated models.