HUMAN NUTRITION

Detailed explanation-1: -The amount of energy in an item of food or drink is measured in calories. When we eat and drink more calories than we use up, our bodies store the excess as body fat. If this continues, over time we may put on weight. As a guide, an average man needs around 2, 500kcal (10, 500kJ) a day to maintain a healthy body weight.

Detailed explanation-2: -Summary. If we regularly eat more kilojoules than our body needs, the excess will be stored as body fat. Achieving or maintaining a healthy weight is all about balancing energy we take in and energy we burn.

Detailed explanation-3: -You gain weight when you eat more calories than you burn-or burn fewer calories than you eat. Some people seem to lose weight more quickly and more easily than others. But everyone loses weight by burning more calories than are eaten. The bottom line is calories count.

Detailed explanation-4: -When energy intake exceeds energy expenditure, a state of positive energy balance occurs and the consequence is an increase in body mass, of which 60 to 80 percent is usually body fat (2).

Detailed explanation-5: -Positive energy balance occurs when energy intake is greater than energy expenditure, usually resulting in weight gain. Negative energy balance is when energy intake is less than energy expenditure, usually resulting in weight loss. Energy intake is made up of the calories we consume from food and beverages.