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But you know what

Perhaps the most renowned example of nicotine's influence on appetite and feeding behavior is the significant weight gain associated with smoking cessation

In adults who have never smoked, secondhand smoke can cause heart disease, lung cancer, and stroke

Key Takeaways Nicotine leaves the body quickly, but its metabolite lasts much longer: Nicotine itself is usually eliminated within 13 days, but cotinine (the primary metabolite tested for) can remain detectable for up to 10 days in blood and up to 3 weeks or longer in urine for heavy users

Lifestyle changes like diet, exercise, social support, stress management, sleep, and management of alcohol consumption can also help.