A diet, or regimen, refers to the specific way a person chooses to eat, often to achieve health goals or maintain overall well-being. It can include various types of foods, portion sizes, and meal timings. People may follow a diet to lose weight, gain muscle, or manage health conditions like diabetes or heart disease. Different diets, such as the Mediterranean diet or keto diet, emphasize different food groups and nutrients. A balanced diet typically includes fruits, vegetables, whole grains, and lean proteins, providing essential vitamins and minerals. Following a healthy diet can lead to improved energy levels and better overall health.