This is easy, from the same place cows get their protein. Green grass makes them big and strong. There is more bio-available protein in plants than in meat. I was surprised to learn this myself. I used to chow down on pork, chicken, red meat, and fish thinking I was doing my body good. That’s what we were taught in school wasn’t it? Well come to find out plants, nuts, nut butters, beans, quinoa, rice, oats, and seeds all have protein. The bonus is they’re easier to digest, low in bad fats, don’t have artery-clogging cholesterol, and will give us more energy.