What’s a calorie?
A calorie or kilocalorie, is a unit used to measure energy. A calorie, by definition, is the amount of energy needed to raise 1 kg of water 1 degree celsius. Calories in our diet come from macronutrients or energy-yielding nutrients, such as fats, proteins and carbohydrates. Carbohydrates and proteins offer 4 calories per gram while fats provide 9 calories per gram. Alcohol is not an essential nutrient but it does provide calories, 7 calories per gram.
The body uses energy, in the form of calories, to perform all of its functions. If you consume more calories than your body needs, the excess may be stored as fat. If/when a food shortage exists, the body can break down stored fat for energy. Losing excess body fat successfully is achieved by creating an energy defecit by consuming fewer calories than you need daily to maintain your weight. Eating less and exercising more is the best strategy for losing excess fat.
