![]() Calories are also what people burn when they expend energy during physical activities. The number of calories in food signify how much potential energy it contains. The Journal of Nutrition defines a calorie as the amount of heat needed to raise the temperature of 1 kilogram of water from 0 to 1 degree Celsius. Why do we need to know TDEE? To understand daily energy expenditure better, we must look at how calories affect our body. According to a study, protein produces the highest thermic effect, while fat requires the lowest. Fat, protein, and carbohydrates require varied amounts of energy for digestion.
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