When it comes to boosting your calcium intake, there are few vegetables as effective as spinach, which is rich in this bone-enhancing mineral. By adding spinach to your daily or weekly diet, you can ensure that your body receives its daily recommended amount of calcium, as well as other important nutrients. Spinach also has a number of antioxidant effects on the body, which can help prevent chronic conditions and oxidative stress, which can exacerbate conditions like osteoporosis as we age.