A recent study has revealed that breathing in particles from common cleaning products may lead to serious lung damage, potentially more severe than the effects of accidental ingestion. The research specifically highlights a compound known as quaternary ammonium, or QAC, which is found in numerous disinfectant sprays sold in the UK, including major brands like Lysol and Clorox. While QAC has been a known toxic substance when accidentally ingested since the 1940s, scientists now believe its inhaled form could be even more detrimental to lung health.

Researchers at the University of California, Davis, conducted tests on mice exposed to airborne QAC particle levels similar to those experienced by humans using disinfectants at home. The findings indicated that when QAC entered the airway, it caused significantly greater lung injury and higher lethality compared to oral ingestion. Dr. Gino Cortopassi, a biochemist and pharmacologist at the UC Davis Weill School of Veterinary Medicine and lead author of the study, emphasized this surprising result, stating, "The surprising result of this study was that these compounds, when inhaled, caused 100-fold more lung injury and 100-fold more lethality compared to oral ingestion." He further questioned the widespread environmental use of QAC-based disinfectant sprays given their demonstrated lung toxicity in mice.

Previous research from the same team has shown that a significant proportion of the population, specifically eight out of ten people, have detectable traces of QAC in their bloodstream. This substance is thought to interfere with the body's cellular energy production. A 2021 study corroborated this, finding that participants with the highest levels of QAC in their blood also exhibited the lowest energy levels within their mitochondria, which are the cell's primary energy-producing organelles.

The implications of low mitochondrial energy production are far-reaching, having been linked to various conditions such as chronic fatigue, muscle weakness, and brain fog. Beyond this, QAC exposure has also been associated with other adverse health effects, including skin and eye irritation, inflammation, metabolic disruption, and respiratory conditions like asthma and chronic obstructive pulmonary disease (COPD).