Which of the following yields the greatest caloric value per gram? a. fats, b. proteins, c. carbohydrates, d. all are equal in caloric value.

Verified step by step guidance

1. Identify the caloric value per gram for each macronutrient: fats, proteins, and carbohydrates.
2. Recall that fats provide approximately 9 calories per gram.
3. Recall that proteins provide approximately 4 calories per gram.
4. Recall that carbohydrates provide approximately 4 calories per gram.
5. Compare the caloric values: fats (9 cal/g) vs. proteins (4 cal/g) vs. carbohydrates (4 cal/g) to determine which yields the greatest caloric value per gram.

Key Concepts

Caloric Value of Macronutrients

Caloric value refers to the amount of energy provided by macronutrients per gram. Fats provide approximately 9 calories per gram, while proteins and carbohydrates each provide about 4 calories per gram. Understanding these values is essential for evaluating the energy content of different foods.

Fats as Energy Sources

Fats are the most energy-dense macronutrient, making them crucial for energy storage and supply in the body. They play a vital role in various bodily functions, including hormone production and nutrient absorption, and are particularly important in diets focused on energy efficiency.

Role of Proteins and Carbohydrates

Proteins and carbohydrates serve essential functions in the body, including tissue repair and energy provision, respectively. While they are important for overall health, their caloric contribution is lower than that of fats, which is a key consideration in nutritional planning and dietary choices.