As an expert in the field of oncology, I can provide you with information on the main causes of cancer. It's important to note that cancer is a complex disease with multiple factors contributing to its development. Here are the three main causes of cancer, based on extensive research and consensus within the medical community: 1. Tobacco Use: This is the single most preventable cause of cancer. Smoking tobacco products can lead to various types of cancer, including lung, throat, mouth, and bladder cancer. Even exposure to secondhand smoke can increase the risk of developing cancer. 2. Unhealthy Lifestyle Choices: This includes both diet and physical activity. A diet high in processed and red meats, and low in fruits and vegetables, can increase the risk of certain cancers. Additionally, a lack of physical activity can contribute to obesity, which is linked to an increased risk of several types of cancer. 3. Exposure to Carcinogens: This can come from various sources, including environmental pollutants, certain chemicals in the workplace, and radiation from the sun or medical procedures. Prolonged exposure to ultraviolet (UV) radiation from the sun is a well-known cause of skin cancer. Other factors, such as certain viral infections (like HPV and Hepatitis B), genetic predisposition, and chronic inflammation, also play a role in the development of cancer. However, the three causes listed above are considered primary and are significant contributors to the global burden of cancer. read more >>

Common Causes of CancerSmoking and Tobacco.Diet and Physical Activity.Sun and Other Types of Radiation.Viruses and Other Infections.read more >>