Need a quick protein boost? Hard-boiled eggs, scrambled eggs or spinach omelet are all you need to increase your protein intake and energy levels at the same time. Avoid eating fried eggs or use olive oil when cooking them. Eggs contain more than 11 essential vitamins and minerals, including protein, iron, zinc, calcium, selenium, vitamins A, B12, E, D, and many more. Since eggs are fortified with muscle-building amino acids, they make an ideal post-workout food.