A tuna salad sandwich made on 100 wholewheat bread with lett

A tuna salad sandwich made on 100% whole-wheat bread with lettuce, tomato and 1 Tbsp, of mayonnaise contains the following macro-nutrients In the amounts shown below. How many total calories does the sandwich contain? What percentage of the total calories is from the 35 grams of carbohydrate contained in the sandwich? Your dietitian suggests that you try to consume 55% of your total daily calories from carbohydrate foods, and you total daily calorie intake is 2.150 calories. How many calories come from the 55% carbohydrates? Calculate the number of grams of carbohydrate from the 55% carbs? Assume your total daily caloric intake is 1,850 kcals and you split these total calories among the three macronutrients as follows Carbohydrate 55%. Protein 25%. Fat 20%. Calculate how many calories comes from the protein? Calculate now many calories come from the fat? Calculate how many grams of Fat are contained in this dinner entree?

Solution

Q. 1) The calorie content of the various macro nutrients in a tuna salad sandwich are as under:

i. Carbohydrate:   @4kcal per gram in 35 grams i.e. 140kcal

ii. Fat : @ 9kcal per gram in 7 grams i.e. 63 kcal

iii. Protein: @ 4 kcal per gram in 18grams i.e. 72kcal

1A) The total calories in the tuna salad sandwich are 140 + 63 + 72 = 275 kcal

1B) The calorie content of 35 grams of Carbohydrate is 140 kcal. Therefore, the percentage of calories from Carbohydrate to the total calorie content is 140/275*100 i.e. 50.91 %

Q2) 2 A) The total daily calorie requirement is 2150 calories. %% % of this calorie requirement is %% % of 2150 i.e. 1182.50 calories which have to come from Carbohydrate.

2 B) Since Carbohydrate contains calories @4kcal per gram, 1182.50 calories would require 1182.5/4 i.e. 295.63 grams of Carbohydrate.

Q3) 3 A) If the daily calorie intake is 1850kcal, and 25 % calories have to come from Protein, the total calories that have to come from Protein are 25 % of 1850 kcal i.e. 462.50 kcal.

3B) If 20 % calories have to come from Fat and the total calorie requirement is 1850 kcal, then , the total calories that have to come from Fat are 20 % of 1850 kcal i.e. 370 kcal.

Q4) 4 A) The Applebee’s dinner contains 950 kcal. 25% of these come from Fat, i.e. @5 % of 950 kcal or 237.50 kcal. Since 1 gram of Fat contains 9 kcal, the Fat content of the Applebee’s dinner is 237.5/9 = 26.39 grams

4B)The total daily calorie intake is 2100 calories. Since the Applebee’s dinner has 950 kcal, the percentage of total 2100 calories represented by the Applebee’s dinner is 950/2100*100 or, 45.24%.

NOTE: Since the words calories and kcals are used intercahageably in the common parlance, we have treated these as the same.