Not to mention that I know vegans. I know what has been drilled into them and what they take as face value. Mentioning such low values for protein requirements without factors as age, activity levels, body weight, age or gender is just plain ignorance of nutrition. To think a 20 yr old male professional football player weighing 300 lbs and a 48yr old housewife weighing 120lbs needing the same amounts of protein is just wrong. Also mentioning beans as a protein source when they are not completely bioavailable and lack essential amino acids and having to add grains is something vegans forget. Lastly, daven touched on some of the osteoporosis argument, but there is so much more.