In my 30s. eat healthy diet and exercise. have had 5 colon polyps removed between my last to colonoscopies? all benign. 1 tubular adenoma. risk?

Real risk: Your diet and exercise have little or no impact on your likelihood of developing colon cancer, but are very much worth doing for their own sake, for the fitness satisfaction, and other health benefits. This is mostly about your genes and dumb luck. You'll want to be 'scoped fairly often and little lesions removed promptly to reduce your risk greatly.