My answer to Should I worry about lung cancer at 21 years old?
Answer by Connie b. Dellobuono:
Use the power of your mind to stop smoking. Carcinogens from cigarettes smoking in due time will accumulate to lead to lung cancer, the most painful cancer of all. Increase your intake of Vitamin C and amino acid lycine. Always ensure that your immune system is strong with exercise, eating whole foods (cilantro and other greens/bitters/colored veggies) and getting good sleep. Take probiotics and eat citrus/pineapples.
CAT scan and MRI scan can detect lung cancer. But at your age, concentrate on stopping smoking.