Bananas
Everybody loves having bananas for breakfast. You can put them in your smoothie, on top of pancakes or just have it by itself on the way to work. Even if bananas are a healthy snack, consuming them on an empty stomach can decrease energy levels. The immediate energy boost comes from their high sugary content, but after a couple of hours you will start to feel hungry and tired. The best thing to do is combining bananas with other foods rich in healthy fats such as peanut butter.