The best way to treat obesity is to eat a healthy, reduced-calorie diet and to exercise regularly. To do this you should:
eat a balanced, calorie-controlled diet as recommended by your GP or weight loss management health professional (such as a dietitian)
join a local weight loss group
take up activities such as fast walking, jogging, swimming or tennis for 150-300 minutes a week
eat slowly and avoid situations where you know you could be tempted to overeat