5.Dark leafy vegetables
Choose vegetables that are rich in color because this also means that they are rich in nutrients. Dark green leafy vegetables such as collards, spinach, and Swiss chard supply generous amounts of calcium, fiber, vitamins A and C, iron and protein. For instance, a single serving of spinach supplies 200% of your daily requirement of vitamin A. Dark leafy vegetables are also easy to prepare. You can simply stir-fry or boil them for a dose of quick nutrition. A common symptom of iron deficiency is fatigue. The iron found in spinach promotes the circulation of red blood cells in the body which improves concentration levels by helping you feel more alert.