Obesity is characterized by excessive body weight due to an accumulation of fat in the body. It is typically defined using the body mass index (BMI) measurement, with a BMI of 30 or higher indicating obesity. This condition often results from a combination of genetic, environmental, and lifestyle factors, including poor dietary choices and lack of physical activity. Obesity can lead to numerous health complications, such as diabetes, heart disease, and certain cancers. Addressing obesity often requires lifestyle modifications that include a healthier diet and increased physical activity.