Impaired Fasting Glucose (IFG)

The purpose of the research study is to better understand how beta-cells (cells in the pancreas that make insulin and help regulate blood sugar) respond to growth hormone in people with impaired fasting glucose or impaired glucose tolerance at the University of Missouri. The aim of the study is to advance understanding of how growth hormone affects beta-cells and risk factors for developing type 2 diabetes.

The primary objective will be to evaluate the efficacy of GlycoDual in reducing fasting plasma glucose (FPG) and post-prandial plasma glucose (PPG) levels compared to placebo after 90 days of treatment. Secondary objectives are to estimate: * the change of insulin sensitivity (HOMA-IR) * the change of uricemia after 90 days of supplementation compared to placebo. Safety objectives: Collection of the adverse events not related, related or possibly related to the study products.

Assessing the effects of a nutraceutical supplement (Berbevis™) in adults with impaired fasting glucose (100-126 mg/dL) and BMI between 25 and 35. Ninety participants will be assigned to three parallel groups receiving Berbevis™ at increasing daily doses (500 mg, 750 mg, and 1000 mg) for 2 months.

HYPOTHESIS: Impaired glucose tolerance (IGT) and impaired fasting glucose (IFG) have distinct pathophysiologic etiologies. Therefore, therapeutic interventions designed to correct the specific underlying pathogenic abnormalities in IGT and IFG will be required to optimally prevent the progressive beta cell failure and development of overt type 2 diabetes.