what is protein shakes for
Protein shakes are used mainly by athletes who need nourishment right after their workouts, says Jose Antonio, chief executive officer and co-founder of the International Society of Sports Nutrition (ISSN). Protein shakes can range from 100% protein to mostly carbohydrates with a little added protein and fat.rotein shakes vary in protein content. If you're a body builder, you're going to shift to the drinks that have a bit more protein, Antonio says. If you're an endurance athlete, like a marathoner, you may favor drinks with more carbs, Antonio says.