Editor's note: The recipe below is excerpted from Cal-a-Vie Living: Gourmet Spa Cuisine and is part of a healthy and delicious spa menu developed exclusively for Epicurious by Cal-a-Vie.
Chef's notes:
· If you would like to avoid sugar substitutes, you can use 2 tablespoons of regular sugar rather than Splenda.
· Using frozen blueberries rather than ice makes this smoothie thick without diluting its flavor.