<prompt> Metabolism of 100 grams of fat will yield approximately how many kilocalories?200400600900  <response>: Carbohydrates and proteins both contain approximately 4 kcal of energy per gram. Fats are the more energy-efficient storage form, containing 9 kcal of energy per gram. 100 grams of fat would yield 900 kcal of energy. The unit commonly used in physiology and medicine is the Calorie kilocalorie; kcal, which equals 1000 cal. Ref: Barrett K.E., Barman S.M., Boitano S., Brooks H.L. 2012. Chapter 26. Digestion, Absorption, Nutritional Principles. In K.E. Barrett, S.M. Barman, S. Boitano, H.L. Brooks Eds, Ganongs Review of Medical Physiology, 24e. 