Can drinking protein powder after exercise play a role in fitness and muscle building? The answer is yes, but it should also be matched with appropriate carbohydrates, such as bananas, oats, bread and so on. Will the effect of drinking whey protein powder be much obvious? I don't know who you are competing with, but even if you are competing with someone, you won't fall behind. Whey protein is very suitable for fitness and muscle building! ! !