US doctor warns of rising early-onset of colorectal cancer – What are its symptoms? How to reduce risk?

By Admin

27 Feb, 2026

Colorectal cancer is emerging as one of the fastest-growing cancers globally, and what’s particularly concerning is its increasing incidence among people under 50. A US-based gastroenterologist has raised alarm over this growing health trend, highlighting a strong dietary link that may be fueling the rise.

What Is Colorectal Cancer?

Colorectal cancer is a type of cancer that begins in the colon (the longest part of the large intestine) or the rectum (the final section of the digestive tract). Because these cancers share similar characteristics, they are grouped under one name.

Most colorectal cancers start as small, non-cancerous growths called polyps. Over time  sometimes several years  these polyps can develop into cancer. The disease usually begins in the mucosa, the innermost lining of the colon or rectum. If left untreated, it can grow through the wall layers and spread to nearby lymph nodes or other organs.

Early-Onset Cases Rising Worldwide

According to Dr Saurabh Sethi, a Harvard-certified gastroenterologist, early-onset colorectal cancer (under age 50) has risen nearly 80% worldwide over the past 30 years.

In a viral Instagram post, Dr Sethi pointed out one common pattern observed in early-onset cases: ultra-processed foods.

He referenced findings published in JAMA Oncology, which linked higher consumption of ultra-processed foods to increased colorectal cancer risk markers.

Women consuming the highest amounts of ultra-processed food  about one-third of their daily calories  had a 45% higher risk of developing precancerous colon polyps. Since polyps are often the earliest step toward colon cancer, this connection is particularly concerning.

Dr Sethi explained that ultra-processed diets are associated with:

• Chronic low-grade inflammation
  
  

• Microbiome disruption
  
  

• Metabolic dysfunction
  
  

All of these factors are linked to colorectal cancer development. However, he emphasized that the goal isn’t perfection  it’s lowering daily exposure.

Key Risk Factors of Colorectal Cancer

While anyone can develop colorectal cancer, certain risk factors increase the likelihood:

1. Advancing Age

Although traditionally associated with older adults, cases among younger individuals are rising.

2. Family History

Having a close relative diagnosed with colorectal cancer increases personal risk.

3. Health Conditions

Type 2 diabetes and inflammatory bowel diseases such as Ulcerative Colitis and Crohn’s disease elevate risk.

4. Lifestyle Factors

• Diets high in processed meats
  
  

• Sedentary lifestyle
  
  

• Smoking
  
  

• Heavy alcohol use
  
  

Common Symptoms to Watch For

Recognizing warning signs early can make a significant difference. Dr Sethi advises paying attention to:

• Persistent changes in bowel habits
  
  

• Blood in the stool
  
  

• Unexplained weight loss
  
  

• Ongoing abdominal pain
  
  

• Unusual or persistent fatigue
  
  

“Persistent symptoms deserve evaluation,” he stresses. Ignoring these signs can delay diagnosis and treatment.

5 Practical Ways to Reduce Your Risk

1. Reduce Ultra-Processed ‘Staples’

Packaged breads, sweetened yogurts, cereals, flavored creamers, and bottled sauces are major contributors. Small swaps  like choosing whole-grain bread or homemade sauces  can significantly lower daily exposure.

2. Prioritize Fibre Intake

Aim for 25–38 grams of fiber daily. Fiber supports colon health and feeds beneficial gut bacteria, strengthening your digestive system.

3. Minimize Sugary Drinks

Liquid sugars contribute to metabolic stress and gut inflammation. Choose water, coffee, or unsweetened tea instead.

4. Choose Shorter Ingredient Lists

If a label reads like a chemistry experiment, it’s likely ultra-processed. Food should look and sound like real food.

5. Know the Warning Signs

Early action saves lives. Don’t ignore persistent digestive symptoms.

Early Detection Is Key

Colorectal cancer is considered one of the most preventable cancers because it often begins as a polyp. A colonoscopy can detect and remove these polyps before they turn cancerous, making screening a powerful prevention tool.

With early-onset cases rising sharply, awareness, smarter dietary choices, and timely screening are more important than ever. Small, consistent changes today could significantly reduce your long-term cancer risk.

Early prevention isn’t about perfection  it’s about progress.