Weight loss refers to the process of reducing body weight, typically by decreasing body fat. This can be achieved through a combination of dietary changes, increased physical activity, and lifestyle modifications. A calorie deficit, where the number of calories burned exceeds the number of calories consumed, is essential for effective weight loss. Many people seek weight loss for health reasons, such as reducing the risk of heart disease or diabetes. It can also improve overall well-being and boost self-esteem. However, sustainable weight loss often requires long-term commitment and a balanced approach to eating and exercise.