Scientists have found a surprising new use for discarded plastic bottles: turning them into a key medication used to treat Parkinson’s disease.
Researchers at the University of Edinburgh developed a process that converts a common plastic used in water and food containers into L-DOPA, the most widely prescribed drug for managing Parkinson’s symptoms.
Parkinson’s disease affects movement, often causing tremors, stiffness and slowed motion. It occurs when brain cells that produce dopamine gradually die. L-DOPA helps restore dopamine levels, easing symptoms and improving quality of life.
How it works
The new method begins with polyethylene terephthalate, or PET, a plastic found in many beverage bottles. Scientists break it down into basic chemical components, then use genetically engineered bacteria to convert those materials into L-DOPA through a series of biological reactions.
Researchers say this is the first time a biological process has turned plastic waste into a medication for a neurological disease.
The discovery could also help address plastic pollution. PET is one of the most widely used plastics, yet much of it ends up in landfills or the environment. Traditional recycling can be inefficient and often produces lower-quality materials.
This approach, which is sometimes called “bio-upcycling,” turns waste into something more valuable. Scientists say it could reduce reliance on fossil fuels while giving new purpose to discarded plastics.
“This feels like just the beginning,” said Professor Stephen Wallace, who led the research. He said plastic waste can be viewed not just as a problem, but as a resource.
More research ahead
The research is still in early stages, and more work is needed before the process can be used widely. Scientists must ensure it is safe, reliable and cost-effective.
Still, the potential impact is significant. Parkinson’s disease is becoming more common as the population ages, increasing demand for treatment.
If successful, the method could offer a more sustainable way to produce an essential medication while helping reduce plastic waste.
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