Here's how to downsize while getting lots of fresh fruit and flavor. a day, and these ounce blends go a long way toward that; some have a few veggies, too. Add the ingredients to the blender as listed in the recipe for the smoothest results. . This healthy, low-calorie smoothie hits all the right notes. This fruit and vegetable smoothie, made with berries, banana, kale, and spinach, is a great way to start your day or drink post-workout. Learn how to make a smoothie that's packed with protein, fruit, and Lap up this low-cal, citrus-infused healthy smoothie recipe. .. For a thicker shake, you can toss in more ice cubes; you'll add volume without the calories.