12/31/2025
High-dose vitamin C has been shown to protect lungs from air pollution damage.
New research suggests that high doses of vitamin C could help shield lungs from the harmful effects of fine particulate air pollution known as PM2.5.
In experiments led by scientists at the University of Technology Sydney, male mice and lab-grown human lung tissues exposed to PM2.5 were either given vitamin C or left untreated.
The tissues that received vitamin C showed reduced mitochondrial damage, lower inflammation, and less oxidative stress—key cellular processes through which PM2.5 contributes to conditions such as asthma and lung cancer. Because vitamin C is a powerful antioxidant, the findings indicate it may blunt some of the biological damage triggered by these tiny pollution particles.
The study also underscored that even relatively low levels of PM2.5—similar to those found across much of the developed world—can cause dramatic cellular harm, reinforcing growing evidence that there is no truly safe level of air pollution. While the authors and outside experts emphasize the need for further research in humans, they suggest that vitamin C supplementation, at the highest safe dose for an individual, could become a low-cost preventive strategy for people at high risk of exposure, such as those living with chronic respiratory disease or in heavily polluted environments. However, they stress that individuals should consult a healthcare professional before increasing supplementation and that improving air quality remains the most important long-term solution.
References (APA style)
Bai, X., Oliver, B., & colleagues. (2025). Vitamin C supplementation mitigates lung cellular damage induced by fine particulate matter (PM2.5) exposure in mice and human tissues. *Environment International*.
Nield, D. (2025, December 23). A common vitamin could help protect your lungs from air pollution. *ScienceAlert*.