I used to buy frozen berries, add ice cream and milk and some
whey protein powder..... Made good smoothies.
What Are Protein Powders?
Protein powders come in various forms. The three common ones are whey, soy, and casein protein. “Whey is the most commonly used, because it’s a water-soluble milk protein,” says Peter Horvath, PhD, associate professor in the department of exercise and nutrition sciences at the State University of New York at Buffalo.