Smoking is a high-risk factor for lung cancer, and people who smoke and inhale secondhand smoke increase their risk of lung cancer. Quitting smoking is the most fundamental aspect, but we can also help people to exclude smoke toxicity through some diet, which can’t cure the root cause, but can also play a role in giving one more safeguard to health. 1.Selenium-rich food Food research shows that smoking can lead to low levels of selenium in human blood, and selenium is an indispensable trace element (trace element food) for cancer prevention. If the body is deficient in selenium, the incidence of cancer and leukemia of the intestines, prostate, breast, ovary, and lung will increase. Therefore, smokers should always supplement selenium-rich food, the first sesame, malt, mushrooms, garlic, followed by eggs, yeast, tuna, and again animal liver, kidneys, etc.. 2, supplemental vitamins smoking will make your body reserves of antioxidants, vitamins quickly depleted, and the body’s oxidizing substances and then increased, if not timely replenishment will cause peroxidation. Therefore, smokers especially need to supplement antioxidant vitamins, such as carotene, vitamin C, vitamin E and so on. In order to supplement these vitamins in daily life, you should eat more vegetables and fruits and less meat to create an alkaline physiological environment in the body 3, drink tea Some compounds in smoke can lead to thickening of the arterial lining, a significant reduction in gastric acid secretion and an increase in blood sugar (blood sugar food). Tea contains tea polyphenols, caffeine, vitamin C and other ingredients, can play a role in the decomposition of these substances, and can use the diuretic effect of tea to reduce the residence time of toxic substances in the body. 4, cholesterol-lowering food Because smoking can increase the amount of cholesterol and fat deposits in the blood vessels, the brain blood supply is reduced, easy to cause brain atrophy, accelerate brain aging, etc.. So you’d better eat less fatty acids containing fatty meat, and accordingly increase some foods that can reduce or inhibit cholesterol synthesis, such as beef, fish, soy products and some high-fiber foods, as well as chili powder, cinnamon and the skin of fruits and vegetables. 5, alkaline food When a person’s body fluids are alkaline, it can reduce the absorption of nicotine by smokers. You can eat more alkaline foods such as fruits, vegetables and soybeans to reduce the absorption rate of nicotine. At the same time, these alkaline foods can also stimulate the secretion of gastric juices, increase intestinal peristalsis, to avoid indigestion, bloating and hyperlipidemia, which are more common in smokers.