Good source of vitamins and minerals: How much one need?
Dark green leafy vegetables are good sources of many vitamins (such as vitamins A, C, and K and folate) and minerals (such as iron and calcium). They’re also great sources of fiber. Research studies suggest that the nutrients found in dark green leafy vegetables may prevent certain types of cancers and promote heart health. It’s recommended that teens eat at least 3 cups of dark green vegetables per week, or about ½ a cup every day.