Education Corner

Why Is Obesity Linked to Cancer?

Obesity doesn’t just affect the heart and joints—it also raises the risk of several types of cancer. Studies show that maintaining a healthy weight could help prevent up to 40% of cancers worldwide.

How Does Obesity Gradually Increase Cancer Risk?

• Harmful substances from fat: Abdominal and visceral fat produce excess estrogen, which can stimulate abnormal growth in breast and uterine cells.

• Chronic inflammation: Fat tissue releases inflammatory substances that cause long-term low-grade inflammation throughout the body, damaging DNA and increasing the likelihood of cell mutation.

• Excess growth factors: Obesity raises levels of certain hormones and growth factors that promote cell division, making it easier for cancer cells to spread.

• Insulin resistance: Higher insulin levels associated with obesity can overstimulate intestinal and pancreatic cells, increasing the risk of abnormal proliferation.

Which Cancers Are Most Closely Linked to Obesity?

• Women’s cancers: Breast cancer, endometrial (uterine) cancer, ovarian cancer.

• Digestive system cancers: Colorectal, stomach, pancreatic, and liver cancers.

• Other types: Esophageal, kidney, and gallbladder cancers.
  Research indicates that people with obesity have a 1 to 2 times higher risk of developing these cancers compared to individuals with normal body weight.

Early Warning Signs of Obesity-Related Cancer

• Persistent fatigue or unexplained weight changes.

• Digestive issues such as indigestion, abdominal pain, or altered bowel habits.

• Abnormal bleeding, chronic cough, or hoarseness.

• New lumps, warts, or non-healing ulcers on the skin or mucous membranes.

Note: These symptoms do not always indicate cancer, but medical evaluation and screening should be done early.

How to Lower Cancer Risk Caused by Obesity

• Weight loss for cancer prevention: Losing even 5–10% of body weight can significantly reduce cancer-related biomarkers.

• Healthy diet:

  • Eat at least five servings of fruits and vegetables daily for antioxidant protection.

  • Choose whole grains and legumes instead of refined carbohydrates.

  • Reduce intake of red meat, processed meats, and high-heat grilled foods.

• Regular exercise: Do at least 150 minutes of moderate activity per week (e.g., brisk walking) to reduce inflammation and hormonal imbalances.

• Quit smoking and limit alcohol: The combination of smoking and obesity multiplies cancer risk.

How to Prevent Obesity-Related Cancers

• Regular screenings:

  • Women aged 40 and above: Mammogram screening.

  • Individuals aged 50 and above: Colonoscopy.

  • Those with a strong family history: Consider earlier or personalized screening.

• Weight monitoring: Check BMI and waist circumference yearly; aim for <90 cm in men and <80 cm in women.

• Healthy lifestyle: Ensure adequate sleep, manage stress, and avoid long-term high-sugar, high-fat diets.

Obesity can significantly raise the risk of developing cancer. If you notice unexplained symptoms or persistent changes in weight, consult a doctor promptly for detailed assessment and early intervention to prevent cancer-related complications.