The smoke exhaled by Vape contains components such as water vapor, oxygen and carbon dioxide, and may also contain nicotine, isopropanol, propylene glycol, glycerin and other substances in e-liquid.
Usually, e-cigarette liquid contains nicotine, diluents or solvents (including propylene glycol, vegetable glycerin), flavoring spices or essences.
Among them, propylene glycol is usually used as antifreeze, humidifying agent and food additive. It is safe to eat under the conditions of national regulations, but inhaling a large amount of propylene glycol as smoke will cause irritation to the respiratory tract.
The long-term health effects of this stimulation are currently inconclusive.
In addition, chemical reactions may occur between different flavors to generate unknown substances, and generate harmful substances under heating conditions, which will affect the respiratory system, cardiovascular circulatory system, skeletal system and skin.