I have been donating plasma for over ten years at Bio Life. Mostly twice every week. A finger prick test is taken every time you donate to make sure your protein and iron are in range.
The Meat And Dairy Industry has convinced most that you need meat and dairy for proper protein levels. What I just stated refuted that, since I am a Vegan.
I have found that pea protein is the best. I make my power protein shake every day. Pea protein powder, hemp seeds, sunflower or pumpkin seeds, chorella, and nd kale. All organic and GMO free.