CarbohydrateCyclingExerciseMetabolismFatOxidationglucosemetabolismInsulinSensitivityintermittentfastingketogenicdietmetabolichealthMetabolicSwitching 8 Nov 2026 Is Metabolic Flexibility Real? What Science Says About Fuel Switching and Diet Cycling Metabolic flexibility is a genuine physiological process, but the growing interest in switching b…