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Green salad contains whole protein as well just difference is you have to eat it 10 times more to get as much protein you get from meat(Meat contains 20g per 100g but salad 2g per 100g).

Nop havent tried it. But used soy protein together with whey about half on half. They actually benefit from eachother so didnt saw any diference between taking pure whey. However I think Pea protein...