Sometimes the danger is not in what we eat, but in what we breathe. A common cleaning chemical is linked to an increase in liver disease, and the disturbing thing is that it can be in the closet of any home.
Researchers of Keck Medicine of USC revealed that prolonged exposure to tetracloroetileno (PCE) —used in dry cleaning and various degreasers—can triple the risk of liver fibrosisa silent injury that damages the liver over time. The study, published in Liver Internationalis one of the strongest in linking domestic pollution with the deterioration of this vital organ.
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What is PCE and why does it appear in our environment?
The PCE—also known as perc o tetracloroetileno– it’s a volatile organic compound widely used in dry cleaning, adhesives, stain removers and other maintenance products.
The researchers explain that this solvent can be released from recently dry-cleaned clothing, from surfaces treated with products that contain it, or through its accumulation in water and air.
The novelty lies in the fact that, until now, it had focused on its neurological or reproductive effectsbut it has rarely been linked to liver disease so directly.
Where do we find it at home or in industry?
- Dry cleaning equipment that uses PCE to remove stains.
- DIY products such as craft adhesives, stain removers and stainless steel polishes.
- Work or residential environments where there is poor ventilation or chemical waste.
The study showed that about 7% of adults tested had detectable levels of PCE in their blood.
How does this chemical impact liver health?
The research reveals that even Low levels of PCE in the body were associated with up to a tripled risk of developing significant liver fibrosis. —an excessive buildup of scar tissue in the liver—that can progress to cirrhosis, liver failure, or cancer.
The team led by hepatologist Brian P. Lee also found that for every increase of one nanogram per milliliter of PCE in blood, the odds of fibrosis increased fivefold.
Surprisingly, these effects were maintained even after adjusting for alcohol consumption, obesity, or diabetes—traditional liver risk factors—suggesting that chemical exposure is an independent actor.
Why does this liver injury occur?
The postulated mechanism implies that the PCE, once metabolized in the liver, it generates metabolites that damage cell membranestrigger inflammation and promote the formation of scar tissue.
Thus, the injury is not instantaneous, but progressive, silent: the liver accumulates damage until fibrosis becomes significant and clinically detectable.
What implications does it have for us as consumers?
The idea that a chemical used in cleaning or home repair could be linked to liver disease transforms the perception of many households. Experts suggest:
- Evaluate cleaning and DIY products that contain solvents or have ventilation warnings.
- Consider work or hobby environments where PCE or other solvents may be present (e.g., dry cleaners, dry cleaning, workshops). The study found that those who worked in dry cleaners or had greater use of dry-cleaned clothing may be at greater risk.
- Promote chemical safety policies, as well as medical surveillance in people with frequent exposure.
Should we all be worried?
Although the finding is important, it does not mean that everyone who uses a solvent product will develop liver disease. The study highlights an association—not an automatic cause—and notes that risk depends on dose, frequency of exposure, and individual context.
However, it opens the door for those who consider that “I don’t drink, I don’t have a fatty liver, why do I get sick?”review possible chemical factors in your work or home environment.
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The discovery that this everyday chemical—so seemingly harmless—can increase the risk of liver disease reminds us that health does not only depend on what we put in our mouth or the alcohol we drink, but also the air we breathe, the environment we inhabit and the substances we take for granted.
It is a call to review the spaces that we believe are safe. If you feel you might have frequent exposure to solvents like PCE, it would be wise to mention this to your doctor or hepatologist. And although taking care of the liver always involves diet, exercise and moderation, it is not enough: the environment also counts.
