Being obese can have serious health consequences. These include an increased risk of heart disease, stroke, high blood pressure, diabetes, gallstones, and some forms of cancer. Losing weight can help reduce these risks. Any claims that you can lose weight effortlessly are false. The only proven way to lose weight is either to reduce the number of calories you eat or to increase the number of calories you burn off through exercise.
Most experts recommend a combination of both.
Very low calorie diets are not without risk and should be pursued only under medical supervision. Unsupervised very low calorie diets can deprive you of important nutrients and are potentially dangerous. Fad diets rarely have any permanent effect. Sudden and radical changes in your eating patterns are difficult to sustain over time. To lose weight safely and keep it off requires long-term changes in daily eating and exercise habits.