Some scientists say research on microplastics is flawed: What does it mean for our bodies?

"In recent years, there's been a wave of studies reporting that humans are basically full of microplastics: They've been found in our brains, arteries, and even in placentas. But some scientists, quoted and cited in an article published by the Guardian this week, have critiqued some of those findings, saying that microplastics research has been muddied by issues like contamination and false positives."

"However, other scientists who study microplastics and human health say that this framing is overblown. While they concede that the field of studying microplastics in our bodies is new-and that some concerns over study methodologies are valid-readers should not conclude that the entire area of study is filled with errors."

Microplastics have been detected in human brains, arteries, and placentas, indicating widespread bodily presence. Some researchers have raised methodological concerns, citing contamination and false positives that can produce misleading results. A chemist described the criticisms as forcing reevaluation of assumptions about microplastics in the body. Other researchers maintain that claims of pervasive methodological failure are overstated. Those researchers acknowledge the field is new and that some studies require improved methods, but they emphasize that the presence of microplastics in humans is well established and warrants continued, rigorous investigation into health effects.

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