<unk> , usually called quitting<unk>  or stopping<unk> , is the process of discontinuing tobacco<unk> . Tobacco smoke contains nicotine, which is addictive and can cause dependence. As a result, nicotine withdrawal often makes the process of quitting difficult. In the U.S., about 70% of smokers would like to quit<unk> , and 50% report having made an attempt to do so in the past year.<unk>  is the leading preventable cause of death worldwide.<unk>  significantly reduces the risk of dying from<unk> -related diseases such as coronary heart disease, chronic obstructive pulmonary disease (COPD), and lung cancer. Many strategies can be used for<unk> , including abruptly quitting without assistance ("cold turkey"), cutting down then quitting, behavioral counseling, and medications such as bupropion, cytisine, nicotine replacement therapy, or varenicline. Most smokers who try to quit do so without assistance. However, only 3–6% of quit attempts without assistance are successful long-term. Behavioral counseling and medications each increase the rate of successfully quitting<unk> , and a combination of behavioral counseling with a medication such as bupropion is more effective than either intervention alone. A meta-analysis from 2018, conducted on 61 randomized controlled trials, showed that among people who quit<unk>  with a<unk>  medication (and some behavioral help), approximately 20% were still nonsmokers a year later, as compared to 12% who did not take medication. In nicotine-dependent smokers, quitting<unk>  can lead to symptoms of nicotine withdrawal such as nicotine cravings, anxiety, irritability, depression, and weight gain. Professional<unk>  support methods generally attempt to address nicotine withdrawal symptoms to help the person break free of nicotine addiction.
Smoking cessation
Low sodium diet
Weight management
Nicotine replacement therapy
Graded exercise therapy
Cardiac diet
Reverse smoking
Low-fat diet