DO THEY HELP?
Protein powders come in various forms – 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. “It’s also a complete protein, so it’s got all those advantages.” (Complete proteins contain all nine of the amino acids necessary for human dietary needs.) People who are vegan may prefer soy protein.
In very specific circumstances, protein powders can be useful. Most people, even athletes, can also get everything they offer by eating sources of lean protein like meat, fish, chicken, and dairy products.