Calories are a unit of measure for energy and 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).
Calories are a unit of measure for energy and 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).