Core Facts: What Scientists Found
A growing body of research suggests that “ice” flavored vapes those using menthol or synthetic cooling agents like WS-3 and WS-23 may have direct cardiovascular effects that go beyond nicotine. The compounds trick the brain into sensing cold by activating TRPM8 receptors. A recent study in mice found that menthol-containing e-cigarette aerosols raised heart rate and blood pressure and increased ventricular premature beats irregular heartbeats that can signal stress on the heart’s electrical system. Some effects persisted weeks after exposure ended. The findings were reported by ScienceAlert on June 16, 2026, drawing on research published in the Journal of the American Heart Association.
Why Cooling Agents Matter
The cooling sensation in “ice” flavors comes from menthol or synthetic compounds like WS-3 and WS-23. These substances don’t actually lower temperature they activate TRPM8 receptors, the body’s cold sensor. The problem is that TRPM8 receptors arent just in the mouth and throat; they are found throughout the body, including in the cardiovascular system.
Manufacturers increasingly use synthetic cooling chemicals that create a strong icy feeling without a minty taste, allowing fruit, candy, and beverage-flavored vapes to deliver the cooling effect. Being safe to eat does not mean something is safe to inhale. Chemicals absorbed through the lungs reach the bloodstream far more directly than through digestion.
The study also found elevated epinephrine levels (the fight-or-flight hormone), with heart rhythm changes still detectable weeks after exposure stopped. Researchers are now investigating whether similar effects extend to blood vessels, where laboratory studies suggest some flavoring chemicals can damage the cells lining blood vessels one of the earliest signs of cardiovascular disease.
What This Means for Vapers
This doesn’t mean cooling flavors have been proven to cause heart disease that would require larger human studies. But the evidence is strong enough that vapers should be aware of what they are inhaling beyond just nicotine.
If you use ice or cooling flavors regularly, consider rotating with non-cooling options. Pay attention to how your body responds increased heart rate, palpitations, or shortness of breath after vaping specific flavors could be a signal worth heeding. The mouse study showed effects at exposure levels comparable to moderate human use, so heavy users of ice flavors may face higher cumulative exposure.
For those using vaping as a smoking cessation tool, the risk calculation still favors vaping over smoking cigarettes, which contain thousands of known carcinogens. But the emerging evidence on flavor additives suggests that not all vapes are equal from a health perspective.
Industry and Research Context
The findings come amid broader debates about vaping regulation. The FDA recently authorized some fruit-flavored e-cigarettes for the first time, while simultaneously acknowledging they were not better at helping smokers quit than tobacco flavors. A separate Nature study of 4.5 million people found that lung cancer risk was higher in people who took up e-cigarettes than in those who quit smoking completely, suggesting vaping may diminish some of the benefits of quitting.
These converging research threads highlight a reality the industry has long avoided: flavor additives in vapes are not biologically inert, and their long-term health effects remain poorly understood.
What to Watch For
Larger human studies on cooling agents and cardiovascular health are needed and likely coming. The FDA’s evolving stance on flavor regulation may shift as more health data emerges. Vapers should monitor their own symptoms and consider switching to tobacco or unflavored options if concerned.
Sources
- ScienceAlert: Popular Ice Vape Flavors May Have a Hidden Effect on Your Heart
- Journal of the American Heart Association: Menthol E-Cigarette Aerosol Effects on Cardiovascular Function in Mice
- Nature: Huge Study Hints at Risks of Switching from Tobacco Cigarettes to Vapes
Keep Reading
- Do People Who Vape Get Diarrhea? What the Research Says
- California Mandates Unflavored Tobacco Registry
- ZYN Flavors: A Comprehensive Guide
- France Made Possessing a Zyn a Crime: 5 Years in Prison for a Nicotine Pouch
Kevin Li — Founder & Editor, VapeObservation.com Kevin reviews vape products hands-on, prioritizing real-world performance over manufacturer claims. His goal: honest, practical advice that helps everyday vapers make informed choices. Before launching VapeObservation, he was a longtime vaper frustrated by promotional content disguised as reviews. Every article on the site reflects his commitment to data-driven, reader-first testing.
