According to a study published in the scientific journal "Journal of Dairy Science", if you want to be more focused all morning, ditch the buttered toast and opt for a protein-rich breakfast. Of the 80% of French people who eat breakfast, six out of ten have a preference for the traditional buttered baguette.
A breakfast rich in protein, with eggs or oatmeal for example, keeps you satisfied and you can even gain 30 minutes more concentration on average, according to the study.