Breakfast Basics Breakfast is the most important meal of the day. It breaks the 8-12hr fast from last night’s meal and kicks the body’s metabolism back into work mode. Research shows that kids who eat a healthy breakfast complete with whole grains, fiber and protein have improved concentration and performance in the classroom. Kids who eat a healthy breakfast are also more likely to participate in physical activities and maintain a healthy weight through life. Kids who skip out on breakfast are more likely to be irritably and moody and to be mentally distracted by mid-morning as their energy..