So, this is just literally a brief introduction about calories. Calories is units of energy. You need calories to survive. So you actually have your carbs, your proteins and your fats. Each has actually a different calorie per gram. So for example, carbohydrates has four calories per gram of a carb. Your protein has four calories per gram of protein and fat is nine calories per gram of fat. So you’ve probably heard in the past where they didn’t understand…