I had a good friend die at 30 with colon cancer. Part of his problem was he had switched jobs and was working as a temp to hire. They didn't offer benefits until you get hired and he took his chances and lost. So don't go without medical insurance for any period of time. He ended up in the county system, on a waiting list for surgery.
My dad has colon cancer that has spread. He's already had 2 surgeries and isn't expected to live longer than another 5 years. He's 86.
I'm 51, I've had two colonoscopy's and they found polyps in both. Luckily not cancer. My next one is scheduled for February. Of course, not looking forward to it. I've had unrelated cancer, so take that seriously.
Take the prep seriously. At my last one, I heard them talking to the guy in the next bed. He didn't follow his prep closely enough and they sent him home, had to reschedule. So don't do that.
The prep is really the only bad part. When I did mine, they give you a amnesia drug so you won't remember it, even though I was awake for the whole thing. My funny story with the amnesia part: When leaving, my wife was starting a new job and had to get to work. So she asked me what I wanted to pickup for lunch on the way home. I requested a take out BBQ place (Dickey's). She said that would take too long, so what else did I want? Apparently I was thinking about it and didn't respond, so she asked again. WHAT DO YOU WANT FOR LUNCH?
Can we get Dickey's?? That sounds good! Wife explained we ALREADY WENT OVER THIS. My next memory after that was sitting at home staring at a Carl's Junior bag, wife's gone. Hey look! There's a Western Bacon Cheeseburger in there! My favorite! It was like a surprise even though I ordered it.