Have you ever heard of a person who is protein deficient, other than in third world countries where they do not have access to nutrient rich foods – or food in general – on a daily basis? No. Vegans are in no way threatened by protein deficiency. If we ate nothing but wheat, oatmeal, or potatoes, we would easily take in more than enough protein. (Amount of calories from protein.) Watercress 84%, Mushrooms 56%, Spinach 50%, Sprouts 35+.