Too much of a good thing

Sufficient amounts of protein are obtained when caloric requirements are met from wholesome natural vegetable foods. Plant products contain an abundance of protein, without being excessive. How else could the gorilla get to be 800 pounds of muscle, eating solely fruit and leaves? The main point is that we should be concerned about too much rather than too little protein. It is ironic that the chief argument used to promote the use of animal products—the idea that they are rich in protein—is a great reason to avoid them.— Fasting and Eating for Health, page 40