The 7 Best Protein Cereals, According to a Dietitian While each product featured is independently selected by our editors, we may include paid promotion. If you buy something through our links, we may earn commission. Cereal wears many hats in many kitchens — it's the unsung hero of the breakfast table, a champion of quick dinners (unless you're Nara Smith), and a midnight snack confidante. Whether it's floating in a sea of milk or enjoyed straight from the box, cereal has mastered the art of bringing a simple yet nutrient-packed dish to our daily routines. And while any cereal will do if you're just looking for something tasty to snack on, if you're expecting your bowl to do some work — that is, to fill you up for longer than 15 minutes, give you energy, or even help you refuel after a gym session — a high-protein cereal is in order. "Protein cereal?" you may be asking yourself. "I thought cereal was just a carb fix!" But it...