Dr. T. Colin Campbell was raised on a dairy farm in Virgina and he received his masters degree planning on advancing animal protein worldwide, because he felt this was one of the major problems dealing with  man's malnutrition. Until he tried it in the Philippines for those that had liver cancer and they got worse instead of better. That experience stopped him in his tracks, and he wanted to know why this was happening. That began his 45 years of intense research. As a nutritional research scientist at Cornell University he continued his study of plant based foods which includes protein and other nutrients. What his years of research revealed, is important to know if we are trying to get better. The first video shows his overall findings. The second one is more specific.