A calorie is a unit of energy that the body uses for fuel. It's essential for various bodily functions, from breathing to physical activity. The body needs a certain amount of calories each day to maintain normal functions.
How Calories Affect Weight Management?

Calories are directly related to body weight. If you consume more calories than your body needs, the excess is stored as fat. Conversely, if you consume fewer calories than you burn, your body will use stored fat for energy, leading to weight loss.

Regular Types of Calories:

Calories come from different food groups, including fats, carbohydrates, and proteins. Each macronutrient provides a specific number of calories per gram—fats provide 9 calories per gram, while carbohydrates and proteins provide 4 calories per gram.