Carbohydrates, proteins, and fats are the three main macronutrients that provide energy to the body. Each of these macronutrients contains a different amount of calories per gram:
1. **Carbohydrates**: Carbohydrates provide 4 kcal per gram. They are the body’s primary source of energy and are found in foods like bread, rice, pasta, fruits, and vegetables.
2. **Proteins**: Proteins also provide 4 kcal per gram. Proteins are essential for building and repairing tissues, and they are found in foods like meat, fish, eggs, dairy products, and legumes.
3. **Fats**: Fats provide 9 kcal per gram, which is more than double the amount provided by carbohydrates and proteins. Fats are a concentrated source of energy and are found in foods like oils, butter, nuts, and fatty meats.
Understanding the caloric content of these macronutrients can help you make informed dietary choices and manage your energy intake effectively.