1. Not all nutrients provide us with energy. The main nutrients that provide us with energy are Carbohydrates, Proteins and Fats. But that doesnt mean that other nutrients are not important, these 3 nutrients mainly provide us with energy only.

2. Out of the 3 nutrients mentioned, fats provide us with the highest amount of energy. Calorie is a measure of energy thats available to the body. As we consume something, the number of calories it contains. is the number of energy units provided to the body.

1 gram of carbohydrate = 4 calories


1 gram of protein = 4 calories


1 gram of fat = 9 calories