Microplastics are suspected contributors to obesity, review finds
In short: A review of research on human microplastic exposure found that people may unknowingly swallow and breathe in anywhere from roughly ten thousand to several million tiny plastic particles every year, largely through indoor air and water sold in plastic bottles. The authors note that these particles, once thought biologically inert, have been linked in animal and cell studies to disrupted lipid and energy metabolism.
Global plastic production has climbed alongside rising rates of overweight and obesity over the past five decades, and the review points to evidence that microplastics and chemical additives such as phthalates and bisphenols can activate hormone-related receptors tied to fat storage, raising the possibility that microplastics act as obesogens.
As a review, it draws mainly on animal and cell-line studies rather than human trials, so the authors call for more systematic research to confirm whether this applies to people.
Why it matters: Microplastics, once thought harmless, might contribute to the global rise in obesity, though more human research is needed.
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