A A mealreplacement bar containing 23 g CHO 25 g protein and

(A) A meal-replacement bar containing 23 g CHO, 2.5 g protein, and 13 g of fat was consumed by Dr. Clarke for lunch. What is the total energy available in this meal-replacement bar (expressed in kcal)? (B) Assuming Jims total energy requirement (to meet maintenance needs) is 1400 kcal/day, what percentage of this daily energy requirements are provided in this meal?

Solution

(A) In order to calculate the total energy available in the meal replacement bar, we need to multiply the number of grams of carbohydrate by 4, protein by 4, and fat by 9, respectively.

Then try to add everything.

23g carbohydrate x 4 kcal/g =    92 kcal

2.5g protein x 4 kcal/g =      10 kcal

13g fat x 9kcal/g =      117 kcal

Total = 219 kcal

Dr. Clarke will get 219 kCal of energy from his meal replacement bar

(B) The total energy requirement of Jim =1400 kCal/day.

Thet percentage of this daily energy requirements are provided in this meal= 219/1400*100=15.6%