IQOS and other heated-tobacco devices are marketed heavily as a switch route away from cigarettes, especially across Europe and Asia, and searches comparing heated tobacco vs vaping are growing as the category expands into more English-speaking markets. We compared the two on combustion, toxicant-reduction claims, regulation, and — the part most comparisons skip — who actually funded the evidence behind each claim.
Heated Tobacco vs Vaping vs Quitting at a Glance
| Factor | Heated tobacco (IQOS-style) | Vaping (e-cigarettes) | Quitting nicotine outright |
|---|---|---|---|
| Combustion | No burning — tobacco leaf is heated, not lit | No burning — e-liquid is heated to a vapor, no tobacco leaf | No product used |
| Toxicant-reduction claim | FDA granted specific IQOS products a modified risk order in 2020 limited to a “reduced exposure” claim — explicitly not a reduced-risk-of-disease claim | UK OHID: substantially lower exposure to smoking’s carcinogens; not risk-free, residual risk unclear | No exposure to any nicotine-delivery product’s toxicants |
| Cessation evidence | Cochrane (2022): no included study reported smoking cessation as an outcome at all | Cochrane living review: high-certainty evidence e-cigarettes help more smokers quit than NRT; still not a licensed medicine | Cochrane high-certainty evidence for combination NRT, plus behavioral support |
| Independent vs industry evidence | Every randomized trial in the Cochrane review was tobacco-industry funded; most trials rated unclear or high risk of bias | Large body of independent, publicly funded research alongside industry studies | Extensive independent, publicly funded clinical trial base |
| Typical real-world outcome | Substantial dual use with cigarettes rather than complete switching | Switching is common; many switchers stay on nicotine long term | No nicotine dependence maintained |
What Heated Tobacco Actually Is
Heated tobacco products (HTPs), the best-known being Philip Morris International’s IQOS, heat a stick of processed tobacco leaf to a temperature high enough to release nicotine and flavor compounds but below the point of combustion, which is the chemical process that produces most of a cigarette’s tar and much of its smoke. This distinguishes HTPs from both cigarettes (which burn tobacco) and vapes (which heat a nicotine e-liquid with no tobacco leaf at all). Because real tobacco leaf is still present and heated, HTPs sit regulatorily and chemically between cigarettes and e-cigarettes — a distinction that matters for the claims companies are and are not allowed to make.
What the Cochrane Evidence Says About Quitting
Cochrane’s 2022 review Heated tobacco products for smoking cessation and reducing smoking prevalence (Tattan-Birch, Hartmann-Boyce, Kock and colleagues, review CD013790) found that no included study reported on cigarette smoking cessation as an outcome at all — meaning there is currently no evidence that heated tobacco helps people quit smoking. All the randomized controlled trials in the review were funded by tobacco companies, with a median follow-up of only 13 weeks, far too short to draw conclusions about long-term quitting. Two time-series studies did find that the rate of decline in cigarette sales accelerated after heated tobacco launched in Japan, but Cochrane rated this evidence as very low-certainty, since cigarette sales are only an indirect proxy for actual smoking prevalence and the studies carried a real risk of confounding.
The review also found insufficient evidence of a difference in adverse events between people who switched to heated tobacco and those who kept smoking or tried to quit entirely — in other words, the safety comparison itself is not yet well established, let alone the cessation benefit. This puts heated tobacco in a notably weaker evidentiary position than vaping, where independently reviewed randomized evidence does exist for helping smokers stop — see our evidence review on whether vaping helps people quit smoking for that comparison in full. It also sits in a different category from other alternative-combustion products like waterpipe; our comparison of hookah and cigarette risk covers the site’s other combustion-adjacent product for context.
Who Funded the Research Behind the Claims
This is the part most heated-tobacco comparisons skip. The clearest, best-documented fact about the HTP evidence base is the one Cochrane recorded directly: every randomized controlled trial in its 2022 review was funded by a tobacco company. That is unusual even by the standards of consumer-product research, and it is the single most important thing to know when reading a favorable study about IQOS.
Researchers outside the industry have also reported discrepancies between independent measurements of tar, tobacco-specific nitrosamines, and secondhand emissions and the more favorable numbers published in manufacturer-funded work. This does not mean every industry-funded study is wrong, but it is a direct reason for caution: most of the toxicity and health data available on IQOS specifically comes from studies conducted or funded by its manufacturer, and independent researchers have repeatedly called for more publicly funded research before treating the “reduced exposure” framing as settled science.
The Dual-Use Problem
Real-world use data complicates the “switching” narrative that heated-tobacco marketing relies on. Analyses of IQOS users have found substantially lower rates of complete switching away from cigarettes than manufacturer figures suggest, with dual use — smoking cigarettes and using heated tobacco — being the most common pattern, particularly in the first month after someone starts using the product. That matters for anyone considering heated tobacco as a quit method specifically: the usage data suggests it more often supplements a cigarette habit than replaces it, and dual use means you are still inhaling combusted smoke. Our explainer on what is actually in cigarette smoke is useful context for understanding what dual use does and does not reduce your exposure to.
Already using heated tobacco? The product has no exit plan built into it — you have to bring your own. iQuit is free on Google Play and its gradual and scheduled-reduction modes work for stepping down sticks per day, not just cigarettes.
Regulatory Status Around the World
Regulation of heated tobacco varies sharply by market, which shapes both availability and the claims companies can legally make.
- United States: In 2020 the FDA authorized specific IQOS products as a Modified Risk Tobacco Product, permitting only a narrow “reduced exposure” claim — that switching completely reduces exposure to harmful chemicals — and explicitly not a reduced-risk-of-disease claim. The FDA has been clear that such an order does not mean a product is safe or FDA-approved. IQOS was withdrawn from the US market in 2021 over a patent ruling and has since returned to selected US markets.
- United Kingdom: The Tobacco and Vapes Act 2026 received Royal Assent in April 2026 and introduces a generational sales restriction, making it illegal to sell tobacco products to anyone born on or after 1 January 2009, phasing in from 2027.
- European Union: EU rules on tobacco product regulation have been extended to restrict characterising flavours in heated tobacco products, following a documented rise in HTP uptake across member states.
- Japan: One of the largest and most permissive major markets for heated tobacco, where the category took hold years before it reached most English-speaking countries — and, notably, where the only real-world sales data Cochrane could find came from.
It is worth noting this pattern holds across most heat-based or smokeless alternatives, not just IQOS: snus and modern nicotine pouches face similarly inconsistent regulation from country to country, often permitted in one market and restricted in a neighboring one, for reasons that reflect political and historical factors as much as pure toxicology. Our guide to what snus is and whether it is safer than smoking covers the closest smokeless-tobacco comparison to heated tobacco on the site.
Nowhere in this list is heated tobacco licensed as a smoking-cessation treatment. Our explainer on the UK’s disposable vape ban covers how the wider nicotine-regulation landscape has shifted alongside heated tobacco’s rise, and our comparison of nicotine pouches vs vaping covers the other non-combustible categories competing for the same switching audience.
Ranked Recommendation
- Quitting nicotine outright with a licensed method (NRT, behavioral support, or both): The only option on this list with real cessation evidence behind it, and the only one available free through services like NHS Better Health. See our complete comparison of every quit-smoking method and our quit-smoking success-rate statistics by method for the full evidence picture.
- Vaping, with a dated step-down plan: A much larger independent evidence base than heated tobacco, including high-certainty Cochrane evidence that nicotine e-cigarettes help more smokers quit than NRT — though it is not a licensed medicine and switching is not the same as being nicotine-free.
- Heated tobacco, treated cautiously: No cessation evidence at all, every trial in the Cochrane review industry-funded, and real-world data showing dual use is common rather than complete switching. If you already use it, do not assume it is a quitting tool without a separate exit plan.
For heated-tobacco users specifically, the honest starting point is the same as for any nicotine product: a dated taper toward zero, not indefinite “safer” use. Tracking daily use — sticks or pods per day, and cravings between them — makes that taper far more achievable than trying to remember it unaided. The iQuit app’s gradual and scheduled-reduction modes, plus craving forecasts, were built for exactly this kind of step-down, not just cold-turkey cigarette quitting.
Frequently Asked Questions
Does IQOS help you quit smoking?
Cochrane’s 2022 review found no included study measured cigarette cessation as an outcome for heated tobacco, meaning there is currently no evidence that IQOS or similar products help people quit smoking. Real-world data shows dual use with cigarettes is common among users (Tattan-Birch et al., Cochrane Database of Systematic Reviews, CD013790, 2022).
Is heated tobacco safer than smoking?
The FDA authorized specific IQOS products to claim reduced exposure to harmful chemicals compared with cigarettes, but explicitly not a reduced risk of disease. Most of the safety data behind that claim comes from manufacturer-funded research, and Cochrane found insufficient evidence of a difference in adverse events between switchers and continuing smokers.
Is heated tobacco the same as vaping?
No. Heated tobacco heats real processed tobacco leaf without burning it. Vaping heats a nicotine e-liquid that contains no tobacco leaf at all. They are chemically and regulatorily distinct categories, even though both avoid combustion.
Why is most heated-tobacco research funded by the tobacco industry?
Heated tobacco is a relatively recent, patented product category dominated by a small number of manufacturers, and independent research funding for it has lagged. Cochrane’s 2022 review recorded that every randomized controlled trial it included was funded by a tobacco company — an unusually complete industry footprint over an evidence base.
Do most IQOS users completely switch from cigarettes?
Research suggests substantially lower rates of complete switching than manufacturer figures imply, with dual use of cigarettes and heated tobacco being the most common real-world pattern, especially in the first month of use. Dual use means you are still inhaling combusted cigarette smoke.
Is heated tobacco legal everywhere?
No, regulation varies widely. Japan is among the largest and most permissive major markets; the EU has restricted characterising flavours in heated tobacco products; and the UK’s Tobacco and Vapes Act 2026 introduces a generational sales restriction on tobacco products phasing in from 2027.
What is the best-evidenced way to actually quit nicotine?
Licensed nicotine replacement therapy and behavioral approaches like CBT have the strongest, most independent evidence base of any method compared here, including Cochrane’s high-certainty evidence for combination NRT — unlike heated tobacco or vaping, neither of which is licensed as a cessation medicine.
Taper Off Any Nicotine Product With a Real Plan
iQuit’s gradual and scheduled-reduction modes, craving forecasts, and SOS toolkit work for stepping down from heated tobacco, vaping, or cigarettes.
