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Have you ever why you are hungrier than usual if you do not a good night's sleep? Researchers from the University of Chicago say they have one reason. Their study that a lack of sleep makes people hungrier the following day. Sleeplessness chemicals in the brain that the pleasure derived from eating, which also makes us eat more. We to eat food that is high in calories. The researchers that sleep-deprived people craved crisps, sweets and biscuits far more than healthier foods. The researchers also that people in the study who did not get enough sleep ate up to twice as much fat content as when they had for eight hours.

The study was on 14 male and female volunteers in their twenties. They were observed by researchers in two different situations. In one, they 8.5 hours in bed each night and 7.5 hours of sleep. In the other, they just 4.5 hours in bed and averaged 4.2 hours of sleep. The researchers that in the first situation, the subjects ate three meals a day, as normal. However, in the second situation, where they had deprived of sleep, the volunteers were unable to what the researchers called "highly palatable, rewarding snacks". This just 90 minutes after they had a meal that them with 90 per cent of their required daily calories.