Smoking is harmful to the human body in many ways, and many people who do not smoke due to frequent secondhand smoke, the harm to the body has never been worse, so usually you can eat some food to reduce the damage of secondhand smoke on the body, there are the following: first, is carrots, the body contains more carotene on the function of the lungs have a certain protective effect, so usually you can often eat carrots. Second, is the pear, with the effect of moistening the lungs and cough, so usually you can eat 1-2 pears every day. Third, you can also eat more black fungus, belongs to the high fiber food, eat more black fungus on the adsorption of impurities in the lungs has a certain role, can play a role in clearing the lungs. Fourth, white radish also has the role of lung, usually can eat more. In addition to eating the above-mentioned foods, usually also eat more vegetables and fruits to supplement the body’s essential vitamins and minerals.