the amount of fruit and vegetables in your diet. a new study out of harvard seems to show if you exercise more and lose rate, you decrease your risk of developing colon cancer in about 50% of cases because they found, and this is something david and i talk about all the time, a genetic marker. they found a jen domestic marker that in about half of the cases, exercise and diet will help a lot. we need to know that because we want to know which group you re in. so exercise, diet, cutting down on red meat increasing fruit an vegetables. jamie: the fruit and vegetables, dr. samadi, is that a fiber thing? it s one of the major risk factors as marc mentioned, red meat. it s a big risk factor and low fiber. you want to make sure you add all the fruits and vegetables. obviously a lot of african-americans are susceptible to this. we talked about inflammatory bowel disease and colitis is a risk factor. certainly age up over 50 is the reason we start colon o colonosy unless you have family hi