Dewed - not to give medical advice but! I just googled it and it says tofu is considered a safe protein for kidney issues.

You could crumble it up into your rice, for instance. It really is flavorless. I get the sanipak from amazon so i never have to worry about it going bad (except the current open pack, of course). This stuff helps me with hunger, tons. I also like it with fruit. I pretend i made ambrosia!