Where do you get your protein? 
    All vegans get more than their share of that question.  In "Protein, A Revered Nutrient" (part of a transcript of T. Colin Campbell's on-line Plant-Based Nutrition Certification Course-and the author of The China Study) Carl Voit, a German professor, often considered the father of nutrition, determined that 52 grams a day of protein (less than 2 oz.) was the daily requirement.  Protein was, and is, in many ways almost equivalent to the word "meat," as many people fail to recognize that plants have protein, too.  
    In a study on cancer, T. Colin Campbell found that a high intake of (casein-the one he experimented with) protein (20% of the total caloric intake per day) given to rats, promoted the development of tumors, while dropping the intake level to 5% shut down the tumors.  When soy and wheat protein were tested at the same levels, neither were found to promote tumor development.
    Through urine tests, the minimum daily amount of protein was determined to be 5%-6% of total calories per day.  Researchers made some statistical adjustments to come up with the recommended daily allowance of 8% to 10%; which is close to what one tends to get on a plant-based diet (10% to 11%).