Researchers reviewing 25 studies on protein suggest that the protein in eggs makes a valuable contribution to muscle strength, helps to satisfy hunger and provides a source of sustained energy. They suggest that because research shows eggs are rich in leucine, an essential amino acid that plays an important role in how muscles use glucose, they would be a valuable food for men and women undergoing endurance training.

The study, by Drs Donald K Layman and Nancy R Rodriguez, is published in the Jan/Feb 2009 issue of the journal Nutrition Today.