Since the 1970's eating habits in Britain have undergone a change. People have been encouraged by doctors, health experts and government advertisements to eat less fat and more fibre. Fat is believed to be one of the major causes of obesity and heart disease. Forty per cent of adults in Britain are overweight and Britain has one of the highest death rates due to cardiovascular disease in the world. Britons have also become more aware of calories, the energy value of food. Some people count the number of calories they eat every day, so that they can try to take in fewer calories and lose weight. Food manufactures have started to help the general public to make more informed choices about what they eat.So the traditional British breakfast is bacon, eggs or sausages, preceded by fruit and followed by toasts. Britons may eat this breakfast at weekends or on special occasions but prefer a smaller and healthier meal to start a day. Lunch is a light meal and is eaten at school or work. Lunch takes 40 minutes. Dinner is usually the main meal of the day and consists of two courses.