Written by Aisha Saleem, Pharmacist & Health Writer at PharmaHealths.com
Last Updated: July 16, 2026
Is vaping safer than smoking cigarettes, or just less harmful in a different way?
Current evidence suggests vaping carries substantially less harm than smoking, but “less harmful” is not the same as “safe.” As a pharmacist, this is probably the question I get asked most often, usually from someone who has already decided to switch and wants reassurance, or someone trying to help a family member quit and weighing up the options. The honest answer sits between two extremes. Vaping is not risk free, but for an existing smoker, switching completely usually reduces overall harm.
Where does the “95% safer” figure come from, and is it still accurate?
The oft-quoted claim originated from a 2015 evidence review commissioned by Public Health England, which estimated e-cigarettes to be around 95% less harmful than smoking, a figure later reaffirmed in a subsequent OHID evidence update. This number has been widely repeated in public health messaging, but it has also drawn criticism. An editorial in The Lancet pointed out that the original 95% estimate came from a small expert panel’s subjective scoring exercise rather than a direct measurement of relative health outcomes, and some researchers have argued the figure overstates the confidence we can have given how much long-term data is still missing. A more accurate way to interpret this is that vaping is likely significantly less harmful than smoking, but the exact percentage should not be treated as a fixed or precise number. My honest take is that the direction of the finding, vaping being meaningfully less harmful than smoking, is well supported, but treating “95%” as a precise, settled statistic isn’t quite accurate to how that number was derived.
What makes vaping less harmful than smoking in the first place?
The key difference comes down to combustion. Cigarette smoke is created by burning tobacco, which produces tar, carbon monoxide, and thousands of chemicals, over 70 of which are known carcinogens. In fact, cigarette smoke contains more than 7,000 chemicals, many of which are toxic and directly linked to cancer and cardiovascular disease. Vaping heats a liquid rather than burning plant material, so it doesn’t generate tar or carbon monoxide in the same way. The Centers for Disease Control and Prevention notes that this is the main reason e-cigarettes are considered less harmful than combustible cigarettes, since the absence of combustion removes a large share of smoking’s most damaging byproducts.
Does that mean vaping has no health risks at all?
No, and this is the part that often gets lost in translation. E-cigarette aerosol still contains nicotine, fine particles, and various chemical compounds, some of which are linked to inflammation and respiratory irritation. The CDC is explicit that no tobacco or nicotine product, vaping included, is considered completely safe. Nicotine itself, while not classified as a carcinogen, still affects your heart rate, blood pressure, and blood vessels, and the long-term picture for lung health, discussed in more detail in my article on vaping and lung damage, is still being actively studied.
Is switching from smoking to vaping still worth it if you’re already a smoker?
For most existing smokers, yes, switching completely to vaping is likely to reduce your overall health risk compared to continuing to smoke. The NHS supports e-cigarettes as a tool to help people stop smoking, particularly for those who have struggled with other methods, and recommends using them alongside behavioral support from a stop smoking service where possible. The key word here is switching completely, not partially replacing cigarettes. Continuing to smoke while also vaping, known as dual use, does not give you the harm reduction benefit, since you’re still exposed to the combustion byproducts from cigarettes on top of vaping’s own risks.
Is dual use of vaping and smoking worse than either one alone?
Yes, in terms of overall exposure, dual use can mean you’re carrying risks from both products rather than reducing them. If you’re someone who vapes to get through situations where you can’t smoke, but still smokes regularly otherwise, you’re not getting the harm reduction that switching entirely provides. In real world practice, this is one of the most common patterns seen, and it often gives a false sense of reduced risk. If quitting smoking outright feels too difficult in one step, it’s worth talking to your pharmacist or doctor about a plan that moves you toward stopping nicotine altogether, rather than settling into using both products long term.
Should someone who has never smoked start vaping because it’s “safer”?
No, the safer comparison only applies to existing smokers weighing vaping against continuing to smoke. If you’ve never smoked, vaping introduces nicotine dependence and other risks with no corresponding health benefit to offset, because you weren’t exposed to cigarette smoke’s harms in the first place. The 95% safer framing was always meant as a smoking cessation comparison, not a green light for non-smokers to start using nicotine products.
What’s the bottom line if you’re trying to decide between vaping and smoking?
If you currently smoke and are choosing between continuing to smoke or switching completely to vaping, the evidence supports vaping as the lower harm option. If you don’t currently use either product, starting isn’t supported by any version of the evidence, regardless of how the comparison is framed. And if you already vape and are ready to stop nicotine altogether, nicotine replacement therapy such as patches or gum can help you taper off without needing another combustion or aerosol-based product in between. A structured quit plan almost always works better than switching casually without a clear goal.
FAQs
Q1: Is vaping really 95% less harmful than smoking?
The 95% figure comes from a widely cited 2015 evidence review, though the exact number has been debated by some researchers for being based on a subjective panel estimate rather than direct measurement. The overall conclusion that vaping carries substantially less harm than smoking remains well supported.
Q2: Why do doctors say vaping is safer if it still contains nicotine?
Nicotine affects your heart rate and blood pressure but isn’t the primary cause of smoking- related cancers, which come mainly from tar and combustion byproducts that vaping doesn’t produce in the same way.
Q3: Does vaping help you quit smoking completely?
For many people, yes, particularly when combined with behavioral support, though outcomes vary and some people continue using nicotine long term through vaping instead of quitting entirely.
Q4: Is dual use of vaping and smoking worse than either alone?
Yes, using both products means you’re still exposed to cigarette smoke’s combustion byproducts while also taking on vaping’s own risks, so you don’t get the harm reduction benefit of switching completely.
Q5: Is it safe to use vaping as a long-term smoking substitute?
It’s considered a substantially lower-risk option than continuing to smoke, but it isn’t risk-free, so the goal for most people should still be reducing nicotine dependence over time rather than vaping indefinitely.
Call to Action
If you’re weighing up how to move away from nicotine altogether, I’d also encourage you to read my article on vaping and lung damage, which covers what continued nicotine and aerosol exposure can mean for your respiratory health.
Disclaimer
This article is for informational purposes only and does not replace personalized medical advice. Please consult your doctor or pharmacist before making decisions about smoking cessation or nicotine use.
References:
• Centers for Disease Control and Prevention – Health Effects of Vaping
• NHS – Using E-Cigarettes to Stop Smoking
• GOV.UK – Nicotine Vaping in England: 2022 Evidence Update (OHID/PHE)
• The Lancet – E-cigarettes: Public Health England’s Evidence-Based Confusion
