I use Body Fortress. I get it at Meijers or Walmart. Choclate or vanilla. Unflavored I use Unjury. I too was told to use Whey Protein.
I use one by Genepro. It has 30 grams of protein per 1 tablespoon it is tasteless and can be put in either hot or cold foods. It has been a lifesaver for me. I get mine from amazon and it runs about 38 dollars for the package. It lasts a while.
I use Dymatize 100% Whey Protein Isolate. I love the fudge brownie and the cookies & cream.