Whey protein is probably the most widely consumed fitness supplement in existence. It’s a simple product. It contains protein, which is a vital part of building muscle. Without enough protein, your body will not be able to repair itself as effectively, and your growth will slow.
The reason many people turn to Whey Protein as another source of protein, is because not only is it such a simple and easy source, but it’s relatively inexpensive. It’s also one of the best sources of protein you can get, even among whole foods, only beaten by the egg.