The healthiest fast food – what you should eat when you get hungry. With 179 calories in falafel, the lowest calorie fast food is also available at McDonald's.
With 1,042 kilocalories per serving, the Avocado Chili Burger is the highest-calorie product on the fast food market. An adult man should consume around 2,500 calories per day to maintain a healthy diet. With the healthiest breakfast, the course is already set for an energy-rich day.