Science Vs

Is There Really a Plastic Spoon in Our Brains?

May 8, 2025

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  • The widely reported claim of a plastic spoon's worth of plastic in human brains is likely due to a flawed scientific technique that confuses human fat with plastic. 
  • More reliable studies using different methods suggest that while microplastics may be present in human tissues, the quantities are significantly smaller than sensationalized headlines suggest. 
  • The stress and panic caused by alarming, unverified scientific claims about microplastics can be more detrimental to health than the actual presence of microplastics in the body. 

Segments

Introducing Viral Papers Segment
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(~00:00:00)
  • Key Takeaway: A new podcast segment, ‘Viral Papers,’ will investigate scientific studies that gain widespread attention but may have questionable claims.
  • Summary: Wendy Zuckerman introduces the new segment ‘Viral Papers,’ explaining that it will focus on scientific studies that go viral and make extraordinary claims, often sounding ‘dodgy.’ Rose Rimmler, the senior producer, is introduced as the first contributor to this segment.
The Plastic Spoon Brain Study
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(~00:01:54)
  • Key Takeaway: A study claiming a plastic spoon’s worth of plastic in human brains is being scrutinized for potential scientific flaws.
  • Summary: The hosts discuss a viral study that claimed to find a significant amount of plastic in human brains, equivalent to a plastic spoon. They present headlines and express initial alarm, but also skepticism, setting the stage for a deeper investigation.
Critique of Pyrolysis Technique
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(~00:08:30)
  • Key Takeaway: The pyrolysis gas chromatography mass spectrometry technique used in the brain plastic study is unreliable for detecting microplastics due to its inability to distinguish between plastic and natural fats.
  • Summary: The conversation delves into the scientific method used in the brain plastic study, specifically pyrolysis gas chromatography mass spectrometry. Experts explain that burning samples makes it difficult to differentiate between plastic and the brain’s natural fats, leading to potential misidentification.
Contamination and Exaggerated Results
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(~00:16:38)
  • Key Takeaway: Laboratory contamination and the extrapolation of small sample findings can significantly inflate the reported amounts of microplastics in human tissues.
  • Summary: The discussion highlights the pervasive issue of contamination in laboratory settings, where plastic from equipment or clothing can easily enter samples. It’s explained how even a few contaminated particles, when multiplied across an entire sample, can lead to exaggerated conclusions, like the ‘plastic spoon’ claim.
Actual Microplastic Presence and Perspective
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(~00:23:02)
  • Key Takeaway: While sensational claims are likely false, some microplastics are likely present in the body, but in much smaller, less alarming quantities than widely reported.
  • Summary: The hosts explore more reliable methods for detecting microplastics and discuss findings in lung and liver tissues, which show small amounts. They contrast this with the ‘plastic spoon’ study and emphasize that the body also excretes some ingested plastics, suggesting a less alarming reality than the headlines suggest.