AbstractAimsGlucagon‐like peptide 1 receptor agonists and dual agonists have changed the treatment landscape of obesity and type 2 diabetes (T2D), but significant limitations have emerged due to their gastrointestinal side effects, loss of lean mass, and necessity for ongoing subcutaneous injections. Our objective was, therefore, to test a novel small molecule as a different and potentially better tolerated oral medications to improve obesity‐associated impairment in glucose homeostasis.Materials and MethodsHigh‐fat diet (HFD)‐fed mice or severely obese, leptin‐deficient ob/ob mice were randomly assigned to serve as controls or receive oral TIX100, a novel thioredoxin‐interacting protein (TXNIP) inhibitor just approved by the FDA as an investigational new drug for type 1 diabetes (T1D). The TIX100 effects on glucose intolerance and weight control were then assessed.ResultsTIX100 protected against HFD‐induced glucose intolerance, hyperinsulinemia, and hyperglucagonemia. TIX100 also reduced diet‐induced adiposity resulting in 15% lower weight in treated mice as compared with controls on HFD (p <0.05), while preserving lean mass. Even though the TIX100 weight effects were lost in ob/ob mice, TIX100 improved glucose control leading to a dramatic 2.3% reduction in HbA1C (p <0.05), independent of any weight loss. This is consistent with the beneficial effects of TIX100 in non‐obese diabetes models and its protection against elevated TXNIP and islet cell stress common to all diabetes types.ConclusionsThus, TIX100 may provide a novel, oral therapy for T2D that targets underlying disease pathology including islet cell dysfunction and hyperglucagonemia and promotes metabolic health and weight control without aggressive weight loss.