Arugula: Rich in vitamin K, fiber, and antioxidants is arugula. It contains 100% of your daily vitamin K, which is beneficial for bones.
Asparagus: A 20-calorie half-cup meal has 2 grams of fiber, 2 grams of protein, and half the daily vitamin K requirement.
Celery: If a meal contains 95% water, it has little calories. Celery has just 15 calories per cup. It has roughly 15 antioxidants, a major advantage over water.
Chard: Swiss chard, a beet-related leafy green, resembles spinach. It only has 35 calories per cup of chopped chard, so add some to your next salad, soup, or stir fry.
Fennel: Despite looking like an onion, fennel is a carrot and tastes like anise or black licorice. If it sounds good, sliced fennel contains just 27 calories per cup.
Lettuce: An complete cup of lettuce iceberg, red leaf, romaine, etc. It has fewer than 10 calories. They're primarily water, thus lettuce contains little calories and is hydrating.