These 10 Fruit Smoothie Recipes are low calorie and delicious! Plus they come with additional smoothie add-ins to boost nutrition, protein, help ease pain and more. I like to add yogurt to my smoothies to make a creamy and filling smoothie. But you can swap it out for cottage cheese, protein powder, or skip it all together. Special Tip: Be sure to see above in the "Ingredients" section for healthy smoothie toppings!