Dr. Sanjay Gupta examines diet's impact on the brain and the rest of the body. Included: Dr. Mark Jacobsen (Center for Science in the Public Interest); Sen. Tom Harkin (D-Iowa); LaDonna Redmond, a Chicago agriculture activist; and psychiatrist Joseph Hibbeln.
click here to see where to watch or .
Ready to Watch CNN Special Investigations Unit, Season 2007, Episode 22?