Highly processed or sugary foods for breakfast do NOT set you up well to manage daily stresses. These tend to spike your blood sugar levels immediately, but within only a few hours you feel hungry again as your blood sugar levels drop and adrenaline levels surge (according to David Ludwig of Harvard University) because your body is trying to keep you going. This can lead to you not being able to handle stress as well as you should and reach for the nearest sugary snack – starting the cycle again. What you need is low sugar and protein-rich foods, preferably with some healthy fat to keep you full and functioning for longer.