‘A bombshell’: doubt cast on discovery of microplastics throughout human body
Recent scientific critiques have challenged high-profile studies claiming widespread microplastic presence in human organs like the brain, testes, and placenta, labeling them a potential “bombshell” due to contamination risks and false positives.
Researchers highlight inadequate contamination controls and validation in several papers, with one chemist, Roger Kuhlman, calling for a full re-evaluation of the evidence. A review identified 18 studies lacking proper safeguards, where tissue chemistry mimicked plastic signals. Critics like Dr. Cassandra Rauert argue that reported quantities are biologically implausible given typical exposure levels.
A 2024 brain study faced a “Matters Arising” rebuttal for methodological flaws, described by chemist Dusan Materic as “really bad.” The landmark 2022 blood detection paper drew similar scrutiny, though its authors defend the findings and suggest quantities could vary by a factor of 10. Seven studies overall have prompted formal journal challenges.
Microplastics remain a valid environmental concern, especially nanoplastics that may cross barriers, but current detection tools struggle with nanoscale accuracy. Debate persists on health impacts, with some methods like spectroscopy potentially reliable despite flaws in others. Ongoing refinements in research protocols are needed for credible data.
