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<p>Nicotine is a major active ingredient present in tobacco (chemical component nicotine butyrate) and is one of the key factors leading to smoking addiction. The following are the health effects of nicotine and its related harmful substances:</p>
<p>1. Nicotine<br>Function: Nicotine stimulates nicotine receptors on the oral mucosa, causing smokers to experience pleasure and gradually develop dependence.<br>harm:<br>Oral health: Long term exposure to nicotine can lead to oral diseases such as ulcers and gum bleeding.<br>Nervous system: Nicotine can affect the development and function of the central nervous system, leading to the formation of addictive thinking patterns.<br>Cardiovascular system: Overuse of nicotine may lead to discomfort symptoms such as increased heart rate and elevated blood pressure.<br>2.