E-liquids typically consist of propylene glycol, glycerol, flavourings and, where present, nicotine. Heating produces an aerosol that is inhaled. It is not simply harmless water vapour.
Risks depend on ingredients, temperature, device and consumption patterns. This article deliberately provides no instructions for dosing, mixing or using devices.
Basic ingredients and their functions
Propylene glycol and glycerol form the carrier liquid. Flavourings alter the taste but have not automatically been assessed for inhalation. Nicotine is addictive and affects the cardiovascular system and brain. Labels and legal limits do not eliminate all risks.
What happens during heating
Temperature and device condition influence the formation of carbonyl compounds, particles and trace metals. Overheating or dry atomisers can increase exposure. The long-term effects of changing product generations are not fully understood.
Nicotine and dependence
Nicotine can increase heart rate and blood pressure and quickly leads to dependence. Adolescents are particularly vulnerable because their brains are still developing. During pregnancy and breastfeeding, nicotine can harm the child.
Poisoning and storage
Liquids must never be accessible to children. Nicotine can be absorbed through the skin and mouth. Products belong in their original containers with child-resistant closures, separate from food, and must not be transferred to drinks bottles.
- Immediately secure any spilled liquid.
- Rinse skin and eyes with water.
- After swallowing, contact poison information services or emergency services.
Risk comparison and stopping smoking
For adults who smoke, switching completely can reduce exposure to certain combustion products, but it is not risk-free. Dual use maintains many exposures. People who do not smoke should not start; people who smoke benefit from advice and authorised cessation options.
Conclusion
E-liquids are chemical mixtures intended for inhalation, with dependence and health risks. Factual information must not play down these risks through enjoyment-focused or DIY language.
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Source framework
BfR; DKFZ; WHO; EU Tobacco Products Directive; poison information centres. Sources, guidelines and recommendations can change; current professional information and personal advice apply to medical decisions.
Note: This article provides general health and consumer information. It does not replace examination, diagnosis or treatment by qualified medical professionals.
