3. A typical diet in the United States provides 15% of the calories from protein, 45% from carbohydrates, and the remainder from fats. Calculate the grams of protein, carbohydrate, and fat to be included each day in diets having the following caloric requirements. a. 1200 kcal b. 1900 kcal c. 2600 kcal

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### Nutritional Analysis of Typical U.S. Diets

**Problem Statement:**
A typical diet in the United States provides 15% of the calories from protein, 45% from carbohydrates, and the remainder from fats. Calculate the grams of protein, carbohydrate, and fat to be included each day in diets having the following caloric requirements:
a. 1200 kcal
b. 1900 kcal
c. 2600 kcal

**Steps to Solve:**

1. **Determine the caloric values from the percentages given for proteins, carbohydrates, and fats.**
    - Each gram of protein provides 4 kcal.
    - Each gram of carbohydrate provides 4 kcal.
    - Each gram of fat provides 9 kcal.
    
2. **Calculate the specific caloric contributions from proteins, carbohydrates, and fats based on the total caloric requirement.**

3. **Convert the caloric contributions into grams.**

### Solution:

#### (a) For a 1200 kcal diet:
- **Proteins:**
  - 15% of 1200 kcal = 180 kcal from proteins
  - Grams of protein = 180 kcal / 4 kcal/g = 45 grams

- **Carbohydrates:**
  - 45% of 1200 kcal = 540 kcal from carbohydrates
  - Grams of carbohydrates = 540 kcal / 4 kcal/g = 135 grams

- **Fats:**
  - Remainder from fats = 100% - (15% + 45%) = 40%
  - 40% of 1200 kcal = 480 kcal from fats
  - Grams of fats = 480 kcal / 9 kcal/g = 53.3 grams

#### (b) For a 1900 kcal diet:
- **Proteins:**
  - 15% of 1900 kcal = 285 kcal from proteins
  - Grams of protein = 285 kcal / 4 kcal/g = 71.25 grams

- **Carbohydrates:**
  - 45% of 1900 kcal = 855 kcal from carbohydrates
  - Grams of carbohydrates = 855 kcal / 4 kcal/g = 213.75 grams

- **Fats:**
  - Remainder from fats = 100% - (15% + 45%) = 40%
  - 40% of 1900
Transcribed Image Text:### Nutritional Analysis of Typical U.S. Diets **Problem Statement:** A typical diet in the United States provides 15% of the calories from protein, 45% from carbohydrates, and the remainder from fats. Calculate the grams of protein, carbohydrate, and fat to be included each day in diets having the following caloric requirements: a. 1200 kcal b. 1900 kcal c. 2600 kcal **Steps to Solve:** 1. **Determine the caloric values from the percentages given for proteins, carbohydrates, and fats.** - Each gram of protein provides 4 kcal. - Each gram of carbohydrate provides 4 kcal. - Each gram of fat provides 9 kcal. 2. **Calculate the specific caloric contributions from proteins, carbohydrates, and fats based on the total caloric requirement.** 3. **Convert the caloric contributions into grams.** ### Solution: #### (a) For a 1200 kcal diet: - **Proteins:** - 15% of 1200 kcal = 180 kcal from proteins - Grams of protein = 180 kcal / 4 kcal/g = 45 grams - **Carbohydrates:** - 45% of 1200 kcal = 540 kcal from carbohydrates - Grams of carbohydrates = 540 kcal / 4 kcal/g = 135 grams - **Fats:** - Remainder from fats = 100% - (15% + 45%) = 40% - 40% of 1200 kcal = 480 kcal from fats - Grams of fats = 480 kcal / 9 kcal/g = 53.3 grams #### (b) For a 1900 kcal diet: - **Proteins:** - 15% of 1900 kcal = 285 kcal from proteins - Grams of protein = 285 kcal / 4 kcal/g = 71.25 grams - **Carbohydrates:** - 45% of 1900 kcal = 855 kcal from carbohydrates - Grams of carbohydrates = 855 kcal / 4 kcal/g = 213.75 grams - **Fats:** - Remainder from fats = 100% - (15% + 45%) = 40% - 40% of 1900
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