My uncle was a brain surgeon and used to laugh at my Mom and her healthy eating. He said you can live on bread and water. After he retired he called my Mom one day and told her he was sorry and that she was right. He had just lost his youngest to cancer. She only ate garbage and besides the cancer had low levels of most vitamins. They had to put her on one of those nutri pak things. My uncle got a big education about vitamins then.