Protein Powder for recovery?

Hello,

I am a 54 year old long time swimmer.  I have noticed that my recovery from one workout to the next is not anywhere near what it used to be.  I have a pretty good workout and the next one  is pretty flat (lack of energy and slower). I know this comes with age, but I heard that a protein powder recovery mix could potentially help me with recovery and muscle repair.  

Does anyone have any experience with this.  Do these protein recovery drinks make any difference?  Also, any brands or specific mixes you can recommend that have worked well?  

Thank you.