Colonoscopy After 45 for Millennials?

For most people at average risk, no. A colonoscopy at 45 isn’t something every millennial needs to rush into. But if there’s a family history of colon cancer floating around, or IBD in the picture, or symptoms that just won’t settle, then yeah, it matters and shouldn’t wait. In India, the ICMR and most GI bodies still hold 50 as the screening age for average-risk adults, while the Americans dropped theirs to 45 back in 2021 after younger people kept showing up with colon cancer they weren’t expecting. India seems to be heading in roughly the same direction now, with different diets than what our parents grew up on, desk jobs, stress, and a lot of food coming out of packets and delivery apps. All of that adds up over time. So the short version: no blanket rule. Depends on you.

According to Dr. Ksheetij Kothari, Gastroenterologist in Pune, Almost half the millennials we scope these days walk out with something, polyps mostly, sometimes worse. The age cutoff used to make sense. Less so now, at least in metros.

Not everyone walking into a clinic at 40 needs one. But certain groups really should consider it, and a lot of them have no clue.

If colon cancer runs in the family: Say a parent or sibling got diagnosed before 60. That changes things. Standard rule is to start screening ten years before whatever age they were diagnosed at. So if dad got it at 50, you’re looking at 40. Lynch syndrome, FAP, those push it down even further, sometimes to the early 20s.

If you’ve had IBD for a while: Crohn’s, ulcerative colitis, anything running past the 8-year mark. The longer the gut stays inflamed, the higher the risk of colorectal cancer creeping in. Scope becomes routine surveillance, not a choice.

Symptoms that won’t quit: Blood in stool you keep noticing. Bowel habits that flipped a month back and stayed flipped. Weight dropping for no reason. Tiredness that turns out to be iron-deficient anaemia. None of these get a watch-and-wait pass anymore.

If you’ve had stuff removed before: Polyps from a past scope, or pelvic radiation from another cancer. You’re already in the surveillance bucket, even if you feel completely fine.

In any of these brackets, getting a diagnostic colonoscopy is just the cleanest way to know for sure. Easier to deal with something at stage zero than play catch-up at stage three.

Honestly, there isn’t one single cause. It’s more like a stack of small things piling up.

Food changed: Our parents grew up on roti, dal, sabzi, mostly home cooked. Most of us aren’t eating that way anymore. Packaged food, red meat, low fibre, Zomato three nights a week. Studies keep pointing to all of it bumping up risk in younger Indians.

Sitting all day: Tech jobs, traffic, Zoom calls back to back. Gym memberships that look great on paper. Slower gut transit is what comes from that lifestyle, and slow transit has been linked to higher colon cancer risk over years.

Belly fat and diabetes coming young: Type 2 diabetes used to be a 50-plus thing. Now it shows up in late 20s. Same with visceral obesity. Both happen to be tied to higher colorectal cancer rates.

Hidden family histories: This one trips people up a lot. A grandmother who passed away of “stomach problems” in the 1990s, never properly diagnosed. So when someone fills out a family history form today, they tick no. But there might actually be a history sitting there, just undocumented.

Telling apart real colon cancer signs from regular IBS noise is what makes the difference between catching it at 6 months versus 3 years late. If anything, rectal bleeding that keeps showing up is the one symptom worth taking seriously every single time, no matter your age.

Dr. Ksheetij Kothari trained in DM Gastroenterology at St. John’s Medical College Bangalore. He went on to do fellowships in Advanced Endoscopy and Endoscopic Ultrasound, and his work has been published in journals including the Journal of Gastroenterology and Hepatology. His day-to-day covers screening colonoscopies, polyp removal, and the more complex cases that get referred his way.

The feedback he hears most often is about how plainly the reasoning gets laid out. Whether you actually need the scope right now or whether it can wait six months. What he’s looking for during the procedure. What the findings mean in plain language. No upselling. No fear-based pitching. Just clinical judgement.

This blog is for educational and informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Please consult a qualified gastroenterologist or healthcare professional for guidance specific to your symptoms, risk factors, and individual medical history.