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Nutrient Assimilation Windows

Meaning

Nutrient Assimilation Windows are specific, time-bound periods within the 24-hour cycle where the body’s hormonal and enzymatic environment is maximally receptive and efficient for the digestion, absorption, and utilization of macronutrients. This concept is a core tenet of chrononutrition, recognizing that metabolic function is not static but fluctuates according to the circadian rhythm. The timing of nutrient intake, particularly carbohydrates and proteins, can significantly influence postprandial glucose control, insulin sensitivity, and muscle protein synthesis. Optimizing these windows is a powerful strategy for enhancing body composition and mitigating metabolic dysregulation.