Although no definite way exists to prevent lung cancer, avoiding risk factors such as smoking, exposure to high levels of radon and exposure to carcinogens can help reduce the chance of developing lung cancer, according to Mayo Clinic. Maintaining a healthy diet and lifestyle can also help.
The most important risk factor for getting lung cancer is tobacco smoking, notes the National Cancer Institute. Low-tar and low-nicotine cigarettes do not lower the risk of lung cancer. Secondhand tobacco smoke is also a risk factor, since the smoke exposes people to small amounts of cancer-causing agents. Having a family history of lung cancer is another important risk factor, and cigarette smoking tends to run in families.
Approximately one in every 15 homes in the United States has high radon levels, so all homes should be tested for radon, according to the Centers for Disease Control and Prevention. Exposure to asbestos, arsenic, chromium, tar and soot in the workplace can contribute to increased risk of lung cancer.
Eating a diet rich in fruits and vegetables and exercising regularly can decrease the risk of developing lung cancer. Getting vitamins and nutrients from healthy food is best, and large doses of vitamin pills should be avoided, states Mayo Clinic.