One medium-size globe artichoke packs a real punch of dietary fiber, weighing in at 10 grams. Eating the edible parts of the leaves and heart will also serve up a good amount of the required daily value (DV) of vitamin C, vitamin K and folate. A recent study found that artichokes ranked extremely high in total antioxidants per serving, out of more than 1,000 foods tested. Artichokes even outranked broccoli and spinach. Just watch out for those high-calorie sauces that make such delicious dips for the fibrous leaves.