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Bowel cancer in young adults: Oncologist shares 5 causes behind disturbing trend

Published on: Aug 23, 2025 02:44 PM IST

From early warning symptoms to key factors and prevention tips, here’s all that you need to know about bowel cancer in young adults.

For decades, bowel cancer has been associated with older adults. However, in the recent times, there has been a disturbing shift in the occurrence of bowel cancer among people under the age of 50. In an interview with HT lifestyle, Dr Richu Sharma, consultant medical oncologist, Ujala Cygnus Group of Hospitals said, “Changing diets, reduced physical activity, and limited awareness about early symptoms may be contributing to this trend. As a result, many younger patients are diagnosed at more advanced stages, when treatment becomes more complex.” Also read | Gastroenterologist shares 4 bowel cancer symptoms to look out for: Persistent bloating to night sweats

Causes of bowel cancer in young adults:

Abdominal pain is one of the early signs of bowel cancer.(Shutterstock)

Dr Richu Sharma further explained the key factors that contribute to this trend:

1. Dietary shifts and processed foods: High intake of fast food, sugary drinks, and ultra-processed products combined with low fiber intake may disrupt gut health and promote inflammation.

2. Obesity and inactivity: Increasing rates of obesity and sedentary lifestyles contribute to chronic inflammation, which is linked to cancer development.

3. Gut microbiome changes: An imbalance of gut bacteria, often due to diet, antibiotics, or environmental factors, may play a role. Some bacteria that produce harmful toxins appear more frequently in younger patients.

4. Environmental exposures: Chemicals, microplastics, and pollutants may interfere with hormones and affect metabolism, potentially influencing cancer risk.

5. Genetic Predisposition: Family history and inherited conditions like Lynch syndrome or familial adenomatous polyposis (FAP) can significantly raise the risk of early-onset colorectal cancer, especially when screening is delayed. Also read | Gastroenterologist shares 8 foods that can lower the risk of colon cancer: From watermelon, kiwi to yoghurt

Know the early symptoms of bowel cancer. (Pexels)

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.

 
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