Energy intake refers to the total amount of energy consumed through food and beverages. This energy is measured in calories, which are essential for the body to function properly. The body uses this energy for various activities, including maintaining basic bodily functions, physical activity, and growth. Balancing energy intake with energy expenditure is crucial for maintaining a healthy weight. If a person consumes more calories than they burn, they may gain weight, while consuming fewer calories than needed can lead to weight loss. Understanding energy intake helps individuals make informed dietary choices to support their overall health and well-being.