If you smoke and have switched to vaping

This study adds to evidence that vaping has biological effects on lung cells. But it doesn't change the fundamental harm-reduction calculus: vaping is still substantially less harmful than smoking. If you've successfully switched from smoking to vaping and would likely return to smoking if you quit vaping, staying on vapes is probably the lower-risk choice for your health. But if you think you can quit nicotine entirely, that would be even better.

If you vape but never smoked

This research adds to a growing body of evidence that vaping is not risk-free. If you started vaping recreationally and have never been a smoker, the case for quitting is stronger. The potential lung effects, combined with nicotine addiction risks, make recreational vaping a poor health trade-off for non-smokers.

Steps you can take to reduce risk

• Consider reducing frequency. Less exposure = less risk. If you can cut back, do it.
• Avoid high-temperature vaping. Higher temperatures produce more degradation products and potentially more harmful aerosol.
• Use quality devices and e-liquids. Cheap, unregulated products may have more contaminants.
• Stay hydrated. Vaping can dry out airways. Good hydration supports lung health.
• Get your flu shot. If vaping does weaken antiviral defenses, vaccination becomes even more important.
• Pay attention to symptoms. Persistent cough, wheezing, or shortness of breath should be checked by a doctor.

If you're interested in understanding more about what's actually in the vapor you inhale, our vape juice ingredients guide breaks down each component and what the science says about it.