A test of 20 overweight or obese volunteers discovered that those given an egg for breakfast, rather than cereal, felt less hungry come lunchtime, and consequently consumed less at an \'all-you-can eat\' buffet. Researchers at the Pennington Biomedical Research Centre in Louisiana, US, found those given an egg had significantly lower levels of ghrelin, a hormone that stimulates appetite, in their blood three hours after breakfast. They also had significantly higher levels of another hormone, called PYY3-36, which signals we are full. Dr Nikhil Dhurandhar, who led the study, said: \"This study shows that diets with higher protein quality may enhance satiety, leading to better compliance and success of a weight loss diet.\"