Post Shredded Wheat

170 calories, 6g fiber, 6g protein, 0g sugar

This classic cereal ranks fourth on our ranking due to its impressive nutrition, widespread availability, complete lack of sugar, and super-short ingredient list, which is made up of just one item: whole-grain wheat. Add sliced banana, a drizzle of honey, or a sprinkle of cinnamon with stevia, and you have a filling and flavorful morning meal.