You may have also seen casein protein around. In addition to whey, casein is the other type of protein found in milk. It's also a good source of nutrition, but for different purposes. Casein takes longer to digest than whey protein or whey protein concentrate. Which of these milk proteins you choose depends on your needs at the time. When you want to use protein powder as a supplement to help you recover after your workouts, use whey. When you need something to keep you full and to fight off muscle loss overnight, use casein.
Some protein powders include a mix of casein, whey protein concentrate, isolate, and hydrolysate in the ingredient list. This means you'll get some of the benefits of each type that is included. For instance, a protein powder that has casein and whey protein concentrate will give you quick nutrition to recover from training-induced muscle-mass breakdown and also help you stay full so you can stick to your diet.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.