A serving of food contains 24 g carbohydrate, 10 g protein, 3 ounces of water, 6 g fat, 25 mg vitamin B-12, and 1.8 mg iron. Based on this information, a serving of this food supplies ____ kcal.

Question

Quizplus · Accepted Answer

To calculate the total kcal, use the macronutrient calorie values: carbohydrates and proteins provide 4 kcal/g, and fats provide 9 kcal/g. Thus, (24g carbs * 4 kcal/g) + (10g protein * 4 kcal/g) + (6g fat * 9 kcal/g) = 96 + 40 + 54 = 190 kcal. Water, vitamin B-12, and iron do not provide calories.

A Serving of Food Contains 24 G Carbohydrate, 10 G