Since the primary cause of lung cancer is smoking, the best preventive measure is simply not to smoke, Jacobs said.Nutrients can play an auxiliary role, he noted.

• 既然引起 肺癌的 罪魁祸首是 吸烟，最好 的 预防方法 就是 不吸烟，雅各说到，营养品之 能起到一个 辅助的 作用 ，他提到。