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Cancer Factors

octors often cannot explain why one person develops cancer and another does not. But research shows that certain risk factors increase the chance that a person will develop cancer. These are the most common risk factors for cancer:

  • Growing older


  • Tobacco


  • Sunlight


  • Ionizing radiation


  • Certain chemicals and other substances


  • Some viruses and bacteria


  • Certain hormones


  • Family history of cancer


  • Alcohol


  • Poor diet, lack of physical activity, or being overweight
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