The amount of energy in our bodies, obtained from the food we eat, is measured in calories or kilojoules. There are several different macronutrients from which we obtain energy each of which has a different energy value per gram (as shown below). Water 0cal/0kJ Carbohydrate 4cal/16kJ Protein 4cal/16kJ Alcohol 7cal/29kJ […]
carbohydrate
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