The ‘invisible’ chemical increasing Parkinson’s diagnoses

If you’ve read my posts here before, you know how strongly I feel about chemicals in our everyday lives that silently poison us and cause life-threatening and life-limiting diseases.

You may also have read that my father had Parkinson’s disease, so I’ve witnessed first-hand what it can do to a person.

Well, I’m now looking at research pointing to another widely used chemical, also one you probably don’t even know you’re interacting with, that sends the risk for Parkinson’s disease sky-high for all of us…

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The degreaser we’ve been drinking for years

Trichloroethylene (TCE) has been used for at least 100 years, and is still in use, despite long-standing evidence of how easily it spreads and of its connection to disease.

TCE was widely used as a solvent in industrial, consumer, medical and military settings. Its use peaked in the 1970s when two pounds per American were manufactured annually and used to remove paint, correct typing mistakes, clean engines and anesthetize patients.

And, up until the 1970s it was even used in the process to decaffeinate coffee!

Currently, it’s still popular as a solvent for degreasing metal parts and used in the manufacture of a variety of products including wood finished, adhesives and paint and stain removers. It’s also still the primary solvent used to dry clean fabrics in the U.S.

But the most likely way you’d be exposed to TCE without knowing is through your tap water. TCE breaks down better in air, so in soil, it can easily pass through to groundwater, which then becomes the water coming out of your tap that you may drink and use for cooking.

And over the last fifty years or so, research in mice has shown how easily TCE enters both the brain and body tissue…

Recent research and recommendations

At high doses, TCE damages our mitochondria, the energy-producing part of our cells.

A 2008 study established a strong connection between TCE and Parkinson’s. TCE causes the loss of nerve cells whose job it is to produce dopamine. The loss of these dopamine-producing cells is a hallmark of Parkinson’s disease.

In addition, a small epidemiological study found that occupational or hobby exposure to the solvent was associated with a 500% increased risk of developing Parkinson’s.

In a hypothesis paper in the Journal of Parkinson’s Disease, an international team of researchers assert that TCE may be an “invisible cause” of the rise in the number of Parkinson’s disease cases seen in the United States.

A 2022 study backed by the Parkinson’s Foundation showed that nearly 90,000 people are diagnosed with Parkinson’s in the U.S. each year, a 50 percent increase from the previous estimate of 60,000 diagnoses annually.

The authors of the hypothesis paper recommend a number of steps be taken:

  • Use of vapor remediation systems similar to those used to eliminate radon
  • More research to better understand how TCE contributes to Parkinson’s
  • Closer monitoring of groundwater, drinking water, soil and outdoor and indoor air
  • Ultimately, a ban on the use of TCE in the United States

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How to protect yourself from TCE

As long as TCE is still in use, you’ll want to know how to protect yourself.

The federal government has established the safe drinking water standard (also called maximum contaminant level (MCL)) for trichloroethylene as 5 ppb. Local municipalities frequently test drinking water for impurities to make sure it meets EPA guidelines. Public

If your water is provided from a well, have your water tested. Testing of a private water supply is the responsibility of the property owner. The best way to reduce the amount of TCE from drinking water to at least the MCL is a granular activated carbon filter.

Finally, I’d like to offer you the following solid information from the Agency for Toxic Substances and Disease Registry:

How can I be exposed to TCE?

How can I reduce my exposure and my family’s exposure?


Hidden Danger in Your Groundwater? Widely Used Chemical Linked to 500% Increased Risk of Parkinson’s — Neuroscience News

Trichloroethylene: An Invisible Cause of Parkinson’s Disease? — Journal of Parkinson’s Disease

Trichloroethylene (TCE) Is A Risk Factor For Parkinsonism, Study Shows — Science Daily

Statistics — Parkinson’s Foundation

Joyce Hollman

By Joyce Hollman

Joyce Hollman is a writer based in Kennebunk, Maine, specializing in the medical/healthcare and natural/alternative health space. Health challenges of her own led Joyce on a journey to discover ways to feel better through organic living, utilizing natural health strategies. Now, practicing yoga and meditation, and working towards living in a chemical-free home, her experiences make her the perfect conduit to help others live and feel better naturally.