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Fuel Utilization

Meaning

Fuel Utilization refers to the precise, dynamic metabolic process by which the body efficiently accesses, converts, and uses all macronutrients—carbohydrates, fats, and proteins—to generate necessary cellular energy, primarily in the form of Adenosine Triphosphate (ATP). Optimal fuel utilization implies a state of high metabolic flexibility, which is the capacity to seamlessly switch between fat oxidation and glucose oxidation based on immediate physiological demand and nutritional status. This complex process is highly regulated by key metabolic and endocrine hormones.