❓ Do e-liquids contain harmful substances?

The e-liquids used in e-cigarettes may contain certain substances that could be potentially harmful. However, it is important to note that the risks are generally considered lower than those of traditional tobacco, but this does not mean they are entirely free from danger.

Here is an overview of the main components of e-liquids and the substances that may pose health risks:

1. The main ingredients in e-liquids:

• Propylene glycol (PG): Propylene glycol is an odourless, colourless liquid used to create vapour in e-cigarettes. Although it is generally recognised as safe for food and pharmaceutical use, it may irritate the airways and eyes, especially when inhaled repeatedly.
• Vegetable glycerine (VG): Vegetable glycerine is a viscous liquid often added to e-liquids to increase vapour production. It is also used in food and pharmaceutical products. VG may be gentler on the airways, but excessive inhalation can cause throat or lung irritation in some people.
• Nicotine: Nicotine is an addictive substance found in many e-liquids. Although nicotine itself is not directly carcinogenic, it can lead to dependence and have cardiovascular effects. It can also be toxic if swallowed or absorbed through the skin in high doses.
• Flavourings: E-liquids contain various flavourings to provide a range of flavours (fruity, sweet, menthol, etc.). Although most of these flavourings are approved for food use, inhaling certain artificial flavourings may cause respiratory irritation or even long-term lung damage, especially if substances such as acetaldehyde or acetone are used.

2. Potentially harmful substances in e-liquids:

Although e-liquids are considered less harmful than burnt tobacco, some studies have revealed the presence of potentially dangerous chemical compounds, especially when they are heated to high temperatures. Here are a few examples:

• Formaldehyde: This substance, a recognised carcinogen, may form when an e-liquid is heated to very high temperatures. Although formaldehyde levels in e-cigarettes are much lower than in cigarette smoke, prolonged exposure to small amounts could pose a health risk.
• Acetaldehyde: Another chemical that may be produced when e-liquids are vaporised. Acetaldehyde is an irritant to the airways and may be harmful in the long term if inhaled regularly.
• Acrolein: This chemical compound also forms when glycerine or propylene glycol is heated to excessively high temperatures. Acrolein can be toxic to the lungs and airways, especially with repeated exposure.
• Heavy metals: Some e-cigarette devices, especially those with poor-quality coils, may release heavy metals (such as lead, cadmium or nickel) when the coil is heated to high temperatures. These metals may be inhaled and cause damage to the lungs and cardiovascular system.

3. Health risks:

Although the risks associated with e-cigarette use are generally considered lower than those of traditional tobacco, they do exist:

• Nicotine dependence: Nicotine is an addictive substance, and regular use of e-cigarettes can lead to dependence. This can make it difficult to stop using nicotine in the long term.
• Airway irritation: Inhaling vapour containing propylene glycol, vegetable glycerine and flavourings may cause irritation in the throat, mouth and airways. Some people may be particularly sensitive to these substances.
• Unknown long-term impact: The use of e-cigarettes is relatively recent, and although some studies show that they carry lower risks than tobacco, there is not yet enough data on the long-term effects of inhaling vapour.

4. Safety advice:

• Choose quality products: Choose e-liquids from recognised brands that comply with strict manufacturing standards.
• Avoid excessively high temperatures: Do not heat your e-cigarette coil to too high a temperature, as this may release harmful substances.
• Take care with flavourings: Some artificial flavourings may be irritating or toxic in the long term. Avoid e-liquids with little-known or poor-quality flavourings.
• Be cautious with nicotine: If you do not smoke or use nicotine, it is best not to start vaping products containing nicotine.

Conclusion:

E-liquids may contain harmful substances, particularly if e-cigarettes are used incorrectly (for example, at excessively high temperatures). Although the risks associated with e-cigarettes are considered lower than those of traditional tobacco, the best option for your health remains not smoking at all. If you use an e-cigarette to quit smoking, it may be wise to gradually reduce nicotine and consider other methods to quit in the long term.