Vape ingredients

The components of e-cigarette liquid are far more complex than what many people imagine, and they are not merely "water vapor". Usually, the liquid is composed of a base solvent, nicotine, edible flavorings, and other additives.

The main components of e-cigarette liquid and their potential risks are as follows:

Category Specific Component Primary Function Potential Risks and Precautions
Base Solvent (Over 90%) Polyethylene Glycol (PG) Used as a solvent and "smoke generator", responsible for carrying nicotine and flavor, and providing a "throat hit". May irritate the skin and mucous membranes; heating may lead to the decomposition of harmful substances such as formaldehyde and acetaldehyde.
Plant Glycerol (VG) Also used as a solvent and "smoke generator", mainly responsible for generating a large amount of visible smoke and providing a slightly sweet taste. Heating may produce acrolein, which is a respiratory irritant.
Core Component Nicotine (Nicotine) Provides addiction, simulating the satisfaction of traditional cigarettes. Highly addictive. It can affect the cardiovascular and central nervous systems. The nicotine content of some products may not be accurately labeled.
Flavoring Edible Flavorings Provide various flavors (such as fruits, mint, candy, etc.). The largest unknown area. Many flavorings are only safe for consumption but may not be safe for inhalation. For example, diacetyl used to make butter flavor may cause "popcorn lung" when inhaled.
Other Additives Including benzoic acid, citric acid, distilled water, etc. Used to regulate the delivery efficiency of nicotine, provide a taste, or act as a diluent. Some additives (such as benzoic acid) may produce unknown decomposition products when heated.
⚠️ Neglected Harmful Substances
In addition to the main added components, e-cigarettes will produce or bring in various harmful substances during heating and use:

Heating-generated harmful substances: The solvents in the e-liquid will decompose at high temperatures, producing known or possible carcinogens such as formaldehyde, acetaldehyde, and acrolein.

Pollutants from the device and the e-liquid itself:

Heavy metals: Such as lead, nickel, chromium, tin, etc., may come from the heating elements of the device.

Nitrosamines (TSNAs): This is a strong carcinogen specific to tobacco.

Others: May also contain diethylene glycol, diacetyl, and other substances.

 Summary
In conclusion, e-cigarette liquid is a complex chemical mixture, and its components are far more than just water, nicotine, and flavorings. During heating, vaporization, and inhalation, it will introduce or produce various substances that are potentially harmful to health.

It is particularly important to be vigilant that "edible" does not mean "inhalable". Many additives approved for use in food may cause serious harm to the lungs when inhaled.