Hi Jen,
Currently I am using hemp protein, more to appease the hubster as we are all working out. I don't believe we need to purposely eat protein for our bodies to manufacture it, we get it from our fresh plants.
This video explains it all.
http://www.youtube.com/watch?v=ae-dlHOmwk4
After my hemp protein runs out, I'm sticking with fresh greens in my smoothies.