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April 24, 2026

Colorectal Cancer is Rising in Younger Adults—Here’s What to Know

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As more people under 50 are diagnosed, awareness, early detection, and lifestyle choices are more important than ever.

Colorectal cancer has been considered a disease that primarily affects older adults. Today, healthcare providers are seeing a concerning shift – more people under 50 are being diagnosed, highlighting the importance of awareness and early detection.

We spoke with Kiran Virk, Professional Practice Leader at Halton Healthcare’s Cancer Care Clinic, about what people should know, the signs to watch for, and when to seek medical care.  

Colon cancer, also known as colorectal cancer, begins in the lining of the colon or rectum when abnormal cells grow uncontrollably, potentially forming tumours. In many cases, the disease starts as small growths called polyps. While most are harmless, some can turn cancerous over time. Detecting and removing polyps early through screening can prevent cancer from developing.

The exact cause is not fully understood, but a combination of lifestyle and environmental factors can contribute including diet, physical activity levels, weight, and alcohol and tobacco use. While research continues to explain why more younger adults are being diagnosed, awareness and early detection remain important.

One challenge with colorectal cancer is that symptoms can be subtle or develop over time, which is why awareness is so important. These include:

  • Changes in bowel habits, such as diarrhea or constipation

  • Blood in the stool, either bright red or dark

  • Persistent abdominal discomfort, including cramps or pain

  • A feeling of incomplete bowel emptying

  • Unexplained fatigue

  • Unintentional weight loss

“If you’re experiencing any of these symptoms, your first step should be to see your family doctor,” Kiran advises. “They can assess what’s going on and determine whether further testing or referral is needed.”

Screening remains one of the most effective ways to prevent colorectal cancer. For individuals at average risk, screening typically begins between ages 50 and 74, often using a stool-based test every two years. Those at higher risk may start earlier and may require a colonoscopy, with timing and frequency tailored to personal risk factors.

Alongside screening, there are several ways individuals can help reduce their risk, including eating a high fiber diet, staying physically active, maintaining a healthy weight, limiting red and processed meats, and avoiding smoking and excess alcohol.

As colorectal cancer rates continue to rise in younger adults, awareness is key. Early recognition of symptoms and regular screening can make a significant difference in outcomes.

Watch the full conversation with Kiran