HUMAN NUTRITION

Detailed explanation-1: -Fats are the slowest source of energy but the most energy-efficient form of food. Each gram of fat supplies the body with about 9 calories, more than twice that supplied by proteins or carbohydrates. Because fats are such an efficient form of energy, the body stores any excess energy as fat.

Detailed explanation-2: -Carbohydrates are the primary (number one) source of energy for our bodies. With enough carbohydrates, the protein and fat that we eat can do their jobs.

Detailed explanation-3: -Complex carbohydrates contain longer chains of sugar molecules than simple carbohydrates. The body converts these sugar molecules into glucose, which it uses for energy. As complex carbohydrates have longer chains, they take longer to break down and provide more lasting energy in the body than simple carbohydrates.

Detailed explanation-4: -Of the three macronutrients, carbohydrates provide a faster energy source compared with proteins and fats, as they’re your body’s preferred source of energy ( 2 ).