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:

Nicotine is a major active ingredient in tobacco (the chemical component is nicotine acid), which is one of the key factors leading to smoking addiction. The following are the effects of nicotine and its related harmful substances on health:

1. Nicotine
Action: Nicotine stimulates the nicotine receptors on the oral mucosa, making smokers feel pleasant and gradually forming dependence.
Hazards:
Oral health: Long-term exposure to nicotine can cause oral diseases such as oral ulcers and bleeding gums.
Nervous system: Nicotine can affect the development and function of the central nervous system, leading to the formation of addictive thinking patterns.
Cardiovascular system: Excessive use of nicotine may cause uncomfortable symptoms such as increased heart rate and high blood pressure.
2. Tar
Source: Tar is a black particle generated when tobacco burns, mainly composed of nicotine and coke.
Hazards:
Respiratory diseases: Long-term exposure to tar increases the risk of respiratory diseases such as lung cancer and asthma.
Cardiovascular disease: Tar may affect the cholesterol level in the blood circulation and increase the risk of heart disease.
3. Carbon Monoxide
Function: One of the gas components generated by tobacco combustion, it can compete with the oxygen in normal air through the ability of hemoglobin to transport oxygen.
Hazards:
Hypoxia reaction: Long-term exposure to smoke can cause hypoxia in the human body, affecting the function of brain cells and nervous system.
Circulatory system damage: Carbon monoxide may cause poor blood circulation and increase the risk of cardiovascular and cerebrovascular diseases.
4. The harm of nicotine to teenagers
Nicotine is highly addictive. Even if dependence is formed during adolescence, once it is withdrawn, it will seriously affect the nervous system and physiological functions.
Nicotine may also promote problems in the early stages of brain development and affect intelligence and behavioral abilities.
Summary
Nicotine, tar and carbon monoxide are all key factors in health problems caused by smoking. Smoking not only harms personal health, but also seriously threatens the health of others (such as secondhand smoke). In order to protect the health of yourself and others, please be sure to quit smoking completely or avoid contact with tobacco products.