Help & Guidance

Does Vaping Cause Cancer?

Far less harmful than smoking, with no tar or carbon monoxide, so far lower risk, but not risk free and long term effects are still being studied.

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One of the most important questions about vaping is whether it causes cancer. The evidence based position from UK public health bodies is that vaping is substantially less harmful than smoking, because it has no burning tobacco, no tar and no carbon monoxide, the main drivers of smoking related cancer. However, vaping is not risk free, and because it is relatively new, the long term effects are still being studied. This guide gives a careful, honest picture.

Why vaping is far less harmful than smoking

The cancers linked to smoking come overwhelmingly from burning tobacco, which produces tar and thousands of toxic chemicals, many of them carcinogenic. Vaping involves no combustion, so it does not produce tar or carbon monoxide, and the vapour contains far fewer and much lower levels of harmful chemicals than cigarette smoke. This is why health bodies say vaping is substantially less harmful than smoking.

Smoking versus vaping and cancer risk

Factor	Smoking	Vaping
Burning tobacco	Yes	No
Tar	Yes	No
Carbon monoxide	Yes	No
Harmful chemicals	Many, high levels	Far fewer, much lower levels
Cancer risk	High	Far lower, but not zero

But vaping is not risk free

Less harmful does not mean harmless. Vaping is a relatively new product, so the long term effects, including any cancer risk over decades, are still being researched and are not yet fully known. The vapour is not as clean as air, and the honest position is reduced risk rather than no risk. This is why the advice is clear, if you do not smoke, do not start vaping.

The cancer risk from vaping is far lower than smoking because there is no burning tobacco. But it is not zero, and long term effects are still being studied, so the healthiest option is to use neither.

Myths and facts

Myth	The reality
Vaping is just as likely to cause cancer as smoking	No. Without burning tobacco, the cancer risk is far lower.
Vaping is completely safe and cannot cause cancer	It is not risk free, and long term effects are still being studied.
Vaping has no harmful chemicals	It has far fewer and lower levels than smoke, but it is not as clean as air.
If unsure, it is fine for anyone to vape	It is for adult smokers and vapers; non smokers should not start.

What this means in practice

For an adult who smokes, switching completely to vaping greatly reduces exposure to the cancer causing toxins in cigarette smoke, which is why it is recommended as a way to quit. For someone who does not smoke, there is no benefit to weigh against the unknowns, so the advice is not to start. And the healthiest position of all is to use no nicotine, with vapers ideally aiming to stop eventually.

Frequently asked questions

Does vaping cause cancer?

Vaping is substantially less harmful than smoking, with no tar or carbon monoxide, so far lower cancer risk, but it is not risk free and long term effects are still being studied.

Is vaping as bad as smoking for cancer?

No. Without burning tobacco, vaping avoids the main drivers of smoking related cancer.

Is vaping completely safe?

No. It is far less harmful than smoking, but not harmless, and the long term picture is still emerging.

Should I switch from smoking to vaping?

For a smoker, switching completely greatly reduces exposure to harmful toxins and is recommended as a way to quit.

What is the healthiest option?

Using neither cigarettes nor vapes. If you vape to quit smoking, aim eventually to stop nicotine too.

The bottom line

Vaping is substantially less harmful than smoking when it comes to cancer, because it involves no burning tobacco and so no tar or carbon monoxide, the main drivers of smoking related cancer. But it is not risk free, and as a newer product its long term effects are still being studied. For a smoker, switching greatly reduces risk, but non smokers should not start, and the healthiest option is to use neither.

More help and related reading

If this guide raised other questions, the Help and Guidance library has plain English answers to many more. The closely related pages below are worth a look, and you can always return to the main hub to browse every topic we cover. For anything personal or about your own health, a GP, pharmacist or dentist can advise, and a free local stop smoking service can help if you want to reduce or stop using nicotine.

• Does nicotine cause cancer?
• Are Elf Bars safe?
• Are Elf Bars bad for you?
• Browse the full Help and Guidance library

Understanding "less harmful, not harmless"

The phrase used by health bodies, that vaping is substantially less harmful than smoking but not risk free, is worth understanding properly. It means two true things at once, that switching from smoking to vaping greatly cuts your exposure to cancer causing toxins, and that vaping still is not as safe as breathing clean air. Both parts matter, and dropping either one gives a misleading picture.

Because vaping is much newer than smoking, science does not yet have the decades of data needed to be certain about long term effects. That uncertainty is a reason for non smokers not to start, and for vapers to aim to stop eventually, while still recognising that for a smoker, switching is a clear step down in risk.

Reading the evidence

Statement	What it means
Far less harmful than smoking	Switching greatly cuts cancer causing exposure
Not risk free	Vapour is not as clean as air
Long term effects still studied	Vaping is relatively new
Not for non smokers	No benefit to weigh against unknowns
Healthiest is neither	Aim to use no nicotine

A few more questions

Why cant we just say vaping is safe?

Because it is not as safe as clean air, and long term data is still emerging. Less harmful than smoking is the accurate phrase.

Does switching completely matter?

Yes. Switching fully away from cigarettes, rather than doing both, is what greatly reduces your exposure to harmful toxins.

Should vapers aim to stop?

Ideally yes. Those who vape to quit smoking should aim eventually to stop nicotine altogether.

Key things to remember

• Vaping is substantially less harmful than smoking
• No tar or carbon monoxide means far lower cancer risk
• It is not risk free
• Long term effects are still being studied
• Non smokers should not start; the healthiest option is neither

Putting it simply

The accurate, balanced summary is that vaping is substantially less harmful than smoking for cancer risk, because there is no burning tobacco and so no tar or carbon monoxide, yet it is not risk free and its long term effects are still being studied.

For a smoker, that makes switching a clear step down in risk. For a non smoker, there is nothing to gain against the unknowns, so the advice is not to start, and the healthiest path for anyone is to use neither.

Is secondhand vapour a cancer risk to others?

Evidence suggests far lower risk than secondhand smoke, but it is courteous and sensible to avoid vaping around others, especially children.

Will switching to vaping definitely prevent cancer?

Nothing is guaranteed, but switching completely from smoking greatly reduces exposure to the toxins that drive smoking related cancer.

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A quick word on safety and the law

Vaping products are intended for adult smokers and existing vapers as a less harmful alternative to cigarettes. They contain nicotine unless stated otherwise, which is addictive, and they are not suitable for non smokers, pregnant women or anyone under 18. By law you must be 18 or over to buy vaping products in the UK, and we age verify every order. If you want to stop using nicotine altogether, your local stop smoking service offers free, tailored support.

UK public health bodies advise that vaping is substantially less harmful than smoking, but it is not risk free, and if you do not smoke the advice is not to start.

This guide is general information, not personal medical advice. If a symptom is severe, persistent or worrying, please speak to a GP, pharmacist or dentist.