My father diagnosis with colon ca at age 40. he had surgery to remove, now in 70's and healthy.i'm 32, at what age do i need my first colonoscopy?

50 yrs but exception: Screening colonoscopy starts at 50 but if one has symptoms, strong family history, polyps, long standing ulcerative colitis . If you have no symptoms . First see your doctor, after examination stool for occoult blood , epending you doctor will recommend

Age 35: Your colonoscopy should be done 5 years before your father's age at diagnosis. You might also consider getting tested for lynch syndrome (a hereditary genetic defect causing colon cancer in young people) which is associated with other cancers.