Nicotine:
Nicotine is the primary addictive substance in e-cigarettes. It originates from tobacco but is usually present in the form of nicotine salts in e-cigarettes. Nicotine stimulates the central nervous system, producing feelings of pleasure and excitement, while also leading the body to develop a dependency on it. Long-term inhalation of nicotine may cause elevated blood pressure, increased heart rate, and vasoconstriction, thereby increasing the risk of cardiovascular diseases.
Organic Solvents:
Propylene glycol and glycerin are commonly used organic solvents in e-cigarettes. They are responsible for dissolving nicotine and other ingredients in the liquid, which is then atomized through heating by the e-cigarette device. Propylene glycol may produce harmful substances such as formaldehyde at temperatures above a certain level (e.g., 107°C), which are harmful to the human body. Glycerin is generally considered a safe edible substance, but if it contains many impurities, these impurities may form deposits during the heating process or enter the lungs with the vapor, irritating the bronchial mucosa.
Flavoring Agents or Fragrances:
Flavoring agents or fragrances in e-cigarettes are used to enhance the taste and appeal of the product, giving it various flavors such as fruit, mint, etc. These flavoring substances are typically organic compounds that may contain hundreds of different chemical components. Some flavoring substances may produce harmful substances during heating, such as oxidative products and unknown substances, which can affect the respiratory system, cardiovascular-circulatory system, skeletal system, and skin.
Other Additives:
E-cigarettes may also contain other additives such as antioxidants and preservatives to improve product stability and taste. The specific composition and safety of these additives may vary by product and may not have undergone thorough safety assessments.
It should be noted that the composition and safety of e-cigarette products may differ based on brand, model, and manufacturing process. Therefore, when choosing and using e-cigarettes, consumers should carefully review the product's ingredient and safety information and follow relevant usage instructions and warnings.
Furthermore, although e-cigarettes are often perceived as less harmful than traditional cigarettes, they are still not a safe and harmless product. Long-term use of e-cigarettes can lead to various health issues, including addiction, respiratory diseases, and cardiovascular diseases. Therefore, to protect one's health, it is recommended to avoid using e-cigarettes or any form of tobacco products.