Part 4/6:
Calories come from the foods we eat, which can be broken down into macronutrients: carbohydrates, proteins, fats, and alcohol. Below is a summary of the calorie content per gram for each of these macronutrients:
Carbohydrates
One gram of carbohydrates yields about 4 kilocalories (or 4,000 calories). Carbohydrates are a primary energy source for the body, especially during high-intensity workouts.
Proteins
Similar to carbohydrates, one gram of protein also provides 4 kilocalories. Proteins are essential for building and repairing tissues, as well as for overall body maintenance.