4. What are calories and are they good for you?

Calories are a unit of measure for energy. An adequate intake of calories is essential to your health and wellbeing, so your body can perform key functions such as repair and maintenance. Calories come from different nutrients such as carbohydrates (1 gram of carbohydrate = 4 Calories), protein (1 gram of protein = 4 Calories) and fat (1 gram of fat = 9 Calories).