Smoking is not harmful to the liver, because smoking mainly damages the lungs, and there is a lot of nicotine and dust that can cause damage to the cells in the lungs. Although smoking is not harmful to the liver, it is still not recommended, because long-term smoking may cause patients to have lung cancer and can also affect the health of others. The most important factors affecting the liver are drinking alcohol, or eating too greasy food and pickled food, etc. These can cause damage to liver cells, such as inducing malignant changes in liver cells, thus becoming liver cancer, etc. Therefore, you should develop good living habits, such as not smoking, not drinking alcohol, taking in fresh fruits and green vegetables, and taking in low-fat high-quality protein, such as fresh fish, shrimp, and leaner beef, etc. The common ones are fresh fish, shrimp, and leaner beef, etc. Also, physical exercise should be increased appropriately to prevent fatty liver.