IQOS Cigarettes: A Closer Look at Heated Tobacco Products
Medical Disclaimer
This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare professional before making changes to your health routine. If you're experiencing a medical emergency, call 911 or your local emergency number.
Read our full medical disclaimer →IQOS Cigarettes: A Closer Look at Heated Tobacco Products
IQOS heats real tobacco to around 350°C instead of burning it at 800-900°C. That difference eliminates combustion and tar, but it does not eliminate nicotine addiction or every harmful chemical in the aerosol.
Miguel Torres in Tampa switched from Marlboros to IQOS in 2023 after his doctor flagged elevated carbon monoxide levels in his bloodwork. “I still craved it every single hour,” he said. “Just a different device.”
What Are IQOS and HEETS?
When people search “IQOS cigarettes,” they usually mean HEETS (also called HeatSticks), the tobacco units you insert into the device. A ceramic blade inside the holder heats the tobacco from the inside, releasing nicotine and flavor as an aerosol. Nothing burns, so you inhale aerosol instead of smoke.
The system has two components: the holder, which contains the heating blade, and a portable charging case that recharges the holder after each use. One HEETS stick equals roughly one cigarette session. Philip Morris International makes both the device and the HEETS.
What’s Actually In the Aerosol
Philip Morris International claims IQOS aerosol contains 90-95% lower levels of harmful and potentially harmful constituents (HPHCs) than combustible cigarette smoke. That figure comes from PMI-funded studies, which independent researchers have partially confirmed and partially challenged.
Here is what is confirmed present in IQOS aerosol, at reduced levels compared to cigarette smoke:
No tar. That part is accurate. Tar is a combustion byproduct, and IQOS does not combust. But “no tar” is not the same as “no risk.”
IQOS vs. Cigarettes vs. Vaping
All three products deliver nicotine. What else they deliver varies considerably.
| Feature | Traditional Cigarettes | IQOS / HTPs | Vaping (E-cigarettes) |
|---|---|---|---|
| Combustion | Yes | No | No |
| Tar | Yes | No | No |
| Carbon Monoxide | High | Low (not zero) | Trace amounts |
| Real Tobacco | Yes | Yes | No |
| Nicotine | Yes | Yes | Yes |
| HPHCs vs. cigarettes | Baseline | ~90-95% lower (PMI data) | Varies by product |
| Long-term health data | Decades of research | Limited | Limited |
| U.S. regulatory status | Regulated | Modified Risk (FDA, 2020) | Varies |
IQOS received FDA authorization in 2020 as a “modified risk tobacco product” for reduced exposure to certain harmful chemicals. That is not the same as FDA-approved as safe. For a broader look at how these alternatives compare, see our vaping vs. cigarettes breakdown.
The Nicotine Addiction Problem
Switching to IQOS does not break nicotine dependence. HEETS deliver nicotine efficiently, and your brain adapts to expect it on the same schedule it did with cigarettes. This is where the “I Quit Ordinary Smoking” name gets misleading.
If you stop using IQOS, you will face nicotine withdrawal symptoms that look almost identical to quitting cigarettes cold turkey. The device changes the delivery method, not the underlying addiction.
Regulatory Status and What It Actually Means
In 2020, the FDA authorized IQOS for sale in the U.S. as a modified risk tobacco product, acknowledging it reduces exposure to certain harmful chemicals compared to cigarettes. That authorization came with an explicit caveat: it does not mean IQOS is safe. Japan and the European Union allow sales under similar conditions.
Public health organizations, including the CDC and WHO, advise against starting any nicotine or tobacco product, IQOS included. Their concern extends beyond the chemistry. Products positioned as “cleaner” can pull in people who might never have started smoking, which expands nicotine addiction rather than reducing it.
Should You Use IQOS to Quit?
If you are a current smoker who will not quit otherwise, switching completely to IQOS may reduce exposure to some toxicants. That is a narrow, qualified claim, and it is the best the current science supports.
IQOS is not a smoking cessation tool. It replaces one nicotine delivery system with another. If you want to be free of nicotine, you still need a quit plan. Look into what nicotine replacement therapy options are available, or ask your doctor about prescription medications like varenicline that target the addiction itself.
The safest outcome is complete cessation from all tobacco and nicotine products. That is not opinion. That is what decades of data consistently show.