Spinach has plenty of good things going for it, fiber, protein, potassium, vitamins, and minerals, but the phytonutrients it provides are a big aid in keeping the body in tip-top condition. Fruits aren’t the only source of antioxidants, and certain vegetables contain plenty of them, spinach being one of them. Protecting your body from free radical damage is one of the top things you can do to delay the aging process.