Question

In terms of energy density (the amount of energy produced per gram of substance) which caloric nutrient has the greatest and which two are nearly equal?

Answer 1

Solution:

Fat provides the largest amount of energy per gram. Its energy density is 9 Kcal per gram. Hence, even a small amount of food that are rich in fat can pack so many calories.

The two caloric nutrients (Carbohydrates and protein ) each provide nearly 4 kcals per gram energy density. Carbohydrates are the first and quickest form of energy that body turns to when it needs fuel. The human body can burn protein as energy, but it's also used for growth and maintenance and also works as a set of building blocks by which body can use for renovations