E-liquids usually contain propylene glycol, glycerol, flavourings and, depending on the product, nicotine. Mixing them yourself is not a harmless hobby: concentrated nicotine in particular can be absorbed through the skin and mucous membranes and cause severe poisoning if swallowed.
Nicotine-free liquids are not risk-free either. A substance authorised as a food flavouring has not thereby automatically been assessed for repeated inhalation.
PG, VG and flavourings
Propylene glycol carries flavourings and produces a different aerosol from glycerol, which generates more visible vapour. Heating can form reaction and breakdown products. Composition, device temperature and puffing behaviour influence exposure.
Avoiding nicotine poisoning
Nicotine can cause nausea, vomiting, dizziness, sweating, a racing heart, confusion and, in severe poisoning, seizures or breathing problems. Children and pets are particularly vulnerable. Spilled liquid should not be spread with bare hands; professional poison advice is important after exposure.
Why no mixing recipe follows
Concentration errors, mix-ups, unsuitable containers and inadequate labelling can have serious consequences. This article therefore contains neither quantity calculations nor step-by-step instructions. Ready-made products from regulated sources reduce some, but not all, risks.
- Store liquids safely away from children and separate from food.
- Do not inhale oils, essential oils or unknown flavourings.
- Use devices and batteries only according to manufacturer instructions.
Stopping smoking rather than starting
For people who do not smoke, there is no health reason to start vaping. Adults who smoke can use evidence-based cessation services, advice and authorised nicotine replacement products. Nicotine is particularly problematic during pregnancy and adolescence.
Conclusion
Mixing e-liquids combines chemical, toxicological and labelling risks. The safest option is not to vape; for people who smoke, a planned route to quitting is the priority.
Related articles
Source framework
BfR; DKFZ; EU Tobacco Products Directive; WHO. Sources and recommendations can change; current specialist information and personal advice are essential for medical decisions.
Note: This article provides general health information. It does not replace examination, diagnosis or treatment by qualified medical professionals.
