Whether you're snacking on a hard-boiled egg in your room or getting an omelettete in the cafeteria, eggs are one of the most versatile, convenient, and cost-effective proteins you can find. "At just 70 calories, a large egg is an excellent source of eight essential nutrients, including 6 grams of high-quality protein to help keep you satisfied," Brigitte Zeitlin, a registered dietitian and owner of BZ Nutrition in New York City, told POPSUGAR. "An omelettete loaded with veggies is a great breakfast, lunch, or dinner."