We need carbohydrates and fat for energy. Then
why is it that a person who is fasting(not having any
solid food) on a day, is still able to do various activities
on that day?
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The liver helps by converting non-carbohydrate materials like lactate, amino acids, and fats into glucose energy. Because our bodies conserve energy during fasting, our basal metabolic rate (the amount of energy our bodies burn while resting) becomes more efficient, thereby lowering our heart rate and blood pressure.
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