Microplastic Misinformation: The Cool Down’s Clickbait vs. The Science

In recent weeks, several major media outlets have caught on to a fact we've reported for months: the research used to alarm the public about microplastics is limited. These studies have generated a flood of exaggerated headlines, but they were poorly designed and therefore don't tell us very much about the health effects of exposure to microplastics. Several experts have come forward in the last two months to insist that we need better science before drawing any conclusions about human health impacts of these particles.  

Unfortunately, not all media outlets have heeded this advice. The Cool Down—a website that has repeatedly published misleading bottled water coverage—just last week ran another story misrepresenting the results of a new study examining micro- and nanoplastic particles (MNP) in bottled water and drinking water.  

What did they find?‍ ‍

The study is interesting; however, the researchers acknowledge that it “was not focused on risk assessment,” meaning they do not make any concrete claims about human health. This critical detail was nowhere to be found in The Cool Down's coverage of the paper. In fact, the headline from The Cool Down (and its MSN republication) implies the opposite: "Scientists make alarming discovery about impacts of drinking bottled water: ‘Higher than anticipated.’”    ‍ ‍

New Methodology, Not New Dangers  

The January 2026 paper in Science of The Total Environment, which is the basis for the recent misleading claims, is a methodological study introducing "a new approach to isolating and analyzing smaller micro- and nanoplastics." Interestingly, one of its key findings stresses just how difficult it can be to measure micro- and nanoplastics in water without unintentionally altering the results:  

“Moreover, we acknowledge that aspects of our sample processing, such as agitation and ultrasonication, may have inadvertently induced further fragmentation, artificially increasing NP counts. While care was taken to minimize mechanical stress, future work should explore the extent to which laboratory handling influences particle size distributions.”‍ ‍ ‍ ‍

Unlike the press release from Ohio State University promoting the study, the research authors themselves never claim health impacts from their data. The study focuses almost entirely on improved quantification and polymer identification (the type of plastic detected). The "discussion" section, where scientists outline the potential implications of their findings, speculates about how consumers could reduce their exposure to these particles but provides zero new evidence of actual health effects.  

In contrast, The Cool Down article does what sensationalist science coverage does: it leads with fear (“exposes people to alarmingly more plastic,” “doing more than just hydrating you”), and then pivots into speculation about potential risks in blood-brain barrier crossing, without acknowledging the technical limitations the researchers disclosed in their study.

This research incrementally advances the study of plastic particles in tap and bottled water, a worthy outcome. However, improved measurement technology revealing more particles than previously detected is not the same as discovering evidence of risk; it is simply better instrumentation revealing what was already there. And as the FDA has already stated, there is currently no reason for consumers to be concerned about microplastic or nanoplastic contamination in bottled water.  

Simply put: The Cool Down headline is misleading. The study is valuable for analytical chemistry and exposure assessment. It is not evidence that drinking bottled water has “alarming impacts.” That claim is purely sensational, and it's not supported by the study.