is vaping bad for you

July 7, 2026

Is Vaping Bad for You?

What UK health authorities and the current evidence base actually say.

Quick answer: Vaping is not risk-free, but it is substantially less harmful than smoking. UK health authorities including the NHS and UKHSA (formerly Public Health England) support vaping as a harm reduction tool for adult smokers. For non-smokers and young people, vaping is not recommended and carries unnecessary risk.

This is the most important question in vaping and it deserves a direct and balanced answer based on what we actually know, rather than the extremes of either "vaping is completely safe" or "vaping is just as bad as smoking".

What UK Health Authorities Say

The NHS, UK Health Security Agency (UKHSA), Cancer Research UK and Action on Smoking and Health (ASH) all broadly agree that vaping is significantly less harmful than smoking and can be an effective aid for adult smokers trying to quit. The 2015 Public Health England review estimated that vaping was around 95% less harmful than smoking: though this specific figure has been debated, the direction of the evidence is clear and consistent.

The key caveat is context. For an adult smoker unable to quit through other means, switching to vaping represents a significant harm reduction step. For a person who has never smoked, taking up vaping introduces unnecessary health risks that would otherwise be absent.

Known and Potential Health Risks of Vaping

Health area	What is known	Compared to smoking
Respiratory	Some airway irritation in some users; long-term effects not fully known	Far less harmful: no combustion, tar or CO
Cardiovascular	Nicotine raises heart rate and blood pressure; some vascular effects	Less harmful: no CO, but nicotine effects remain
Cancer risk	No established causal link to cancer from vaping; long-term data limited	Substantially lower: no tar, no combustion carcinogens
Nicotine dependence	Vaping with nicotine creates dependence in the same way as smoking	Equivalent: both deliver nicotine and create dependence
Oral health	Some effects on gum tissue and dry mouth from PG	Less harmful: no tobacco staining, no tar on teeth
Long-term effects	Insufficient data: vaping has not been widespread for long enough to generate long-term studies	Unknown: likely less harmful but cannot confirm the full picture yet

How Harmful Is Vaping Compared to Smoking?

Relative harm profile: cigarettes vs vaping vs no use (approximate)

Longer bar = greater overall health risk. Based on current UK health authority assessments.

Cigarette smoking

Highest risk

Vaping with nicotine

Lower risk

Nicotine-free vaping

Low risk

Neither smoking nor vaping

Lowest risk

The Bottom Line

For adult smokers: switching to vaping is a meaningful harm reduction step and is supported by UK health authorities
Vaping is not completely risk-free: nicotine dependency, cardiovascular effects and unknown long-term risks remain
Long-term health data on vaping is still limited because vaping has only been widespread for around 15 years
For non-smokers: there is no health benefit to taking up vaping and it introduces unnecessary risk
For young people: vaping is not recommended and the developing brain is particularly susceptible to nicotine dependence

Frequently Asked Questions

Vaping is generally less damaging to the airways than smoking, but people with respiratory conditions such as asthma, COPD or bronchitis should exercise caution. Any inhaled substance can potentially trigger symptoms, and PG can cause airway irritation in sensitive individuals. If you have a respiratory condition and vape, discuss it with your GP or respiratory specialist.

Current evidence suggests that second-hand vape exposure poses significantly lower risk than second-hand tobacco smoke. Vape aerosol dissipates much faster and does not contain the combustion byproducts that make second-hand smoke harmful. However, being considerate about vaping around others: particularly children, pregnant women and people with respiratory conditions: remains the right approach.

EVALI (e-cigarette or vaping associated lung injury) was a serious outbreak primarily in the United States in 2019. It was subsequently linked almost entirely to vitamin E acetate used as an additive in illicit THC (cannabis) vaping cartridges: not in standard nicotine e-liquids. UK-regulated TPD-compliant nicotine e-liquids do not contain vitamin E acetate, and there was no corresponding outbreak in the UK.

It is a legitimate concern. The honest answer is that we do not yet have decades of follow-up data on long-term vapers. What we do know is that the main chemicals present in cigarette smoke that cause cancer and serious lung disease: tar, carbon monoxide and combustion byproducts: are absent from vaping. The trajectory of the evidence is reassuring relative to smoking, but caution about long-term effects is reasonable, particularly for non-smokers.

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