Dietary energy refers to the energy provided by the food we consume, measured in calories. This energy is essential for our bodies to function, supporting activities such as breathing, digestion, and physical movement. Different foods contain varying amounts of energy, with carbohydrates, fats, and proteins being the primary sources. When we eat, our bodies convert the energy from food into usable forms to fuel daily activities. Consuming more energy than the body needs can lead to weight gain, while insufficient energy intake can result in weight loss and health issues. Balancing dietary energy is crucial for maintaining overall health and well-being.