The primary purpose of a diet is to provide individuals with the necessary nutrients and energy to maintain health and well-being. A balanced diet helps regulate body functions, supports growth, and reduces the risk of chronic diseases. It typically includes a variety of food groups, including fruits, vegetables, grains, proteins, and fats, ensuring that all essential nutrients are consumed in appropriate amounts. Ultimately, a proper diet also plays a role in managing weight and enhancing overall physical and mental performance.