Aging can be associated with a loss of muscle mass and functional deficits. Recent research finds that while testosterone can help older men gain muscle, just adding more protein to the diet does not. Thus, there doesn't seem to be a reason to change protein requirements for seniors.
Some new research may fuel a diet craze — for whole eggs of all things. A study in young men indicates that after resistance exercise, eating whole eggs promotes new muscle formation better than just eating egg whites, even when the amount of protein is the same.