More amino acids are used during exercise than not, therefore more protein will be necessary. But today the average American consumes about 12% of his diet in protein, which under normal training circumstances will easily suffice.
Let’s say, then, that you take more protein than your body can use. There has been a common misconception that because protein makes the kidneys work harder, kidney damage may result from an excess of protein. Logical as that may seem, no studies have uncovered a higher incidence of kidney problems in strength athletes who typically down massive amounts of protein. The excess protein will be stored as fat. Additionally, high levels of protein consumed can lead to water loss as the body eliminates water to dispose of urea, a substance created in the breakdown of protein. This can lead to dehydration.
That said it is clear that excess protein will not cause any long-term health issues to any organs, but taken in excess of your total dietary needs can result in a weight increase. In all of our articles on this subject, we talk again and again about the importance of a healthy balanced diet. If a particular food is good for you, it definitely doesn’t mean that twice as much of that same food is going to be twice as good for you. The body is programmed to take what it needs from the foods we eat, and whatever is left in excess even with the most nutritious foods will hopefully be eliminated, or unfortunately go into storage.