There is a reason why spinach is so often recommended as a part of a healthy diet; there are few vegetables that are so densely packed with beneficial nutrients, including vitamin E. The two different forms of tocopherol present in spinach have been linked to a 40% decrease in the chances of developing bladder cancer. Vitamin E functions as a powerful antioxidant in all parts of the body, but when combined with the other active ingredients in spinach, it is specifically effective when attempting to treat or prevent bladder cancer.