Results presented here suggest that ABA is the endogenous hormone in charge of AMPK activation and imply that low-dose oral ABA may alleviate insulin deficiency, as occurs in hypoinsulinemic TRPM2 KO mice, or contribute to reduce the dose of insulin required to control hyperglycemia in insulin-resistant T2D and in insulin-deficient T1D. This evidence concerns the gene INS and type 1 diabetes mellitus.