Not be absorbed correctly and lay away in tissue. In a similar way to artificially made vitamins and pesticides in our foods. I would eat a real meal. My brother took protein shakes and whey protein. He gained a disgusting amount of weight and his face got swollen with fat. This was because he did not work out while taking them
They are high in calories and can replace a meal containing the amount of protein found in fish or soy and many other meats. The protein however is chemically and artificially made which means it can sometimes
Common high-protein foods contain a lot of minerals and vitamins you need, while protein powder does not. It also does not contain fiber, so it may make you constipated.
If your having a protein drink that is cosidered a meal replacement you will be able to skip a meal or two. Really depends what type of protein your taking.
As brice1967 stated protein drinks are to be used as a supplement! Not as a meal!!
What are you trying to accomplish? Normally protein drinks are a supplement and not made to be "meal replacement". I'm no dietician but typically protein drinks don't have a bunch of nutrients.