Colon cancer is getting more attention, and for good reasons. More adults under 50 are being diagnosed than in the past,1 leaving many people asking the same question — why? Doctors are still working to understand what’s driving the increase.
Why are we hearing about it now?
Because the story has changed. For a long time, colon cancer mostly affected people over 50. That’s what doctors expected, so that’s what the guidelines were built around. But over the past couple of decades, doctors have started noticing more younger adults being diagnosed.
At first, it showed up quietly — in exam rooms, in data charts, in patients who didn’t fit the usual picture. People in their 30s and 40s. People who were busy, active, and didn’t think colon cancer applied to them. Then some of those stories became public.
Public stories about younger adults with colon cancer have also raised awareness. For many people, those stories made the risk feel more real and led to new questions.
That’s when more people started asking, ‘Wait, this can happen earlier? Why didn’t anyone tell us? What does this mean for me?’ Health experts started talking more openly about the rise in younger adults. That talking led to more awareness. Which led to more questions.
But why is it happening?
Ok, now you’re starting to sound like my toddler, but excellent follow-up question. The honest answer is there isn’t just one reason. It’s more like lots of small changes adding up over time. Let’s break it down in a way that makes sense.
Is it because of something we eat?
Partly, yes. Over time, many of us started eating:
- More processed foods
- Less fiber (like fruits, veggies, whole grains)
- More sugary drinks and snack foods
Our bodies don’t love all of that, especially our digestive system. Experts think diet may play a role, but it’s not about one meal or one food. It’s about long-term patterns.
Is it because we sit a lot?
Also, partly yes. Modern life means:
- More desk jobs
- More screen time
- Less everyday movement
Physical activity helps keep digestion running smoothly. When we move less, our bodies notice.
What about chemicals and medicines?
Good question. Researchers are exploring how certain things might affect the gut over many years. Things like:
- Pollution
- Environmental chemicals
- Antibiotics taken early in life
This brings us to another big “why.”
Is it genetic? Could I get colon cancer from my family?
Sometimes, but not usually. Some people do inherit higher risk. But here’s the surprising part: Most younger adults diagnosed with colon cancer do NOT have family history.2 That’s another reason people are paying closer attention now.
So why are younger adults being diagnosed more?
A few reasons:
- Rates are really increasing in younger people
- Symptoms in younger adults are often brushed off
- More awareness means more diagnoses
And because of all this, screening now starts earlier — at age 45 instead of 50 for average-risk adults.
What does this mean for me?
Great question. Probably the most important one. Here’s the reassuring part:
- Most people are still at average risk
- Colon cancer is not common in younger adults
- Knowing about it early gives you more control, not less
This information isn’t meant to scare you. It’s meant to help you make informed choices when the time is right.
What should I do next?
Start by paying attention to your body. Ongoing changes in bowel habits, unexplained weight loss, or persistent discomfort are worth checking out, and you’ve got options. The most important next step is simple — notice changes early, when they’re easiest to treat, or when problems can be prevented altogether.
That can look like:
- Talking with a doctor about your personal risk
- Learning about screening options and when you’re eligible (if you’re 45+ and at average risk, a noninvasive stool-based test could be right for you)
So, if a small voice asks one last time, ‘Why does this matter?’, the answer is simple:
- Rates are changing
- Knowledge is growing
- Early action helps people stay healthy
You don’t have to panic. You don’t have to decide everything today. You just need clear information and a simple next step when you’re ready. And honestly? That’s a pretty good answer to any ‘why.’
Talk to your health care provider about your colon health and the right screening options for you. Or you can request the Cologuard Plus® test through our telehealth provider, who will make sure it’s right for you.
