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The reason most people find difficulty in quitting is because of nicotine found in tobacco.
They are dependent on the nicotine.
Nicotine dependence is the reason so many smokers keep smoking even when they want to quit.
Smokers who want to quit but can't, may find themselves frustrated by a "start-and-stop smoking" cycle - they try to quit, end up smoking, then try to quit again.
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When you smoke, smoke goes into your lungs, and nicotine is rapidly absorbed into your blood1.
Nicotine reaches your brain in about 10 seconds2 , causing chemical changes in your brain that affect how you feel and act3.
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Nicotine makes you feel good, but you will experience withdrawal symptoms such as craving and anxiety when you stop smoking.
Gradually, you develop mental and physical dependence on nicotine3.
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