While Dr. LaPook would usually recommend waiting 10 years between colonoscopies, he says Nate's family historyhis brother and grandfather died from colon cancerindicates that he should probably get one in three years.
Dr. Oz says there's another reason Nate should be vigilant in testing. "African-Americans get colon cancer earlier. It's more aggressive when they get it, which means they die more often from it. We don't want to miss it."