E-cigarettes and vaping have become increasingly popular, particularly among people who believe they are a safer alternative to traditional cigarettes. Some also use vaping products in an attempt to quit smoking.

But are e-cigarettes actually harmless? The answer is no. Although the long-term health effects of vaping are still being studied, experts warn that e-cigarette aerosol can expose the lungs to potentially harmful substances.

Can vaping cause lung cancer?

It is important to distinguish between what is already proven and what is still being researched. Traditional cigarette smoking is a well-established major cause of lung cancer. For e-cigarettes, scientists are still studying the long-term effects, so it is too early to say with certainty how much vaping contributes to lung cancer in humans.

However, that does not mean vaping is safe.

Dr. Shiba Kalyan Biswal, Head of Pulmonology at Shelby International Hospital, explains that e-cigarette aerosols can contain chemicals capable of causing cellular stress and damage. Some laboratory and animal studies have also raised concerns about potential cancer-related effects.

Research into the long-term consequences of these exposures is continuing.

What makes vaping harmful to the lungs?

E-cigarette liquids can contain nicotine, flavouring chemicals, solvents and other substances. When heated, the resulting aerosol may contain additional compounds that can irritate the respiratory system.

Ingredients used in some vaping liquids, including propylene glycol and certain acids, can contribute to irritation and inflammation under some conditions.

The exact health effects can vary depending on the product, ingredients, heating temperature and frequency of use.

What about people who smoke and vape?

One major concern is dual use — consuming both traditional cigarettes and e-cigarettes.

Some smokers may start vaping with the intention of reducing or stopping cigarette use but continue using both products. This means they may remain exposed to the established dangers of cigarette smoke while also inhaling e-cigarette aerosol.

Simply adding vaping to an existing smoking habit should not be considered a safe way to protect the lungs.

Vaping can cause other lung problems too

Lung cancer is not the only concern associated with vaping. Serious respiratory illnesses and lung injuries have been reported, particularly in connection with certain vaping products.

The risks can also increase when products contain unknown, contaminated or improperly formulated substances.

This is why the assumption that vaping is completely harmless can be dangerous.

Can e-cigarettes help you quit smoking?

Some adults use e-cigarettes as part of an attempt to stop smoking. However, switching between cigarettes and vaping without actually quitting smoking may leave a person dependent on nicotine and exposed to harmful substances.

Anyone trying to quit should consider evidence-based smoking cessation options and speak with a healthcare professional about the most appropriate approach.

The bottom line

Vaping should not be viewed as risk-free simply because it does not produce traditional cigarette smoke. While scientists are still investigating the long-term relationship between e-cigarettes and lung cancer, there is already sufficient reason to avoid treating vaping as harmless.

For people who do not smoke, starting to vape offers no health benefit. For smokers trying to quit, completely stopping tobacco use remains the safest goal.