3. Celery
This green veggie offers tons of flavor and is a good source of vitamin K, too; 1 medium stalk serves up nearly 12 mcg, and only has about 6 calories. It’s also full of other valuable nutrients, such as calcium, potassium, folic acid and antioxidants, so you will enjoy tons of benefits to your health when you add celery to your diet. Spread some peanut butter or cream cheese onto celery for a nutritious, low-calories snack. Chop it up and add it to tuna fish, add it to soup, or mix it in with a casserole.