Microplastics removal breakthrough discovered by seventh-grade student using psyllium husk

In a notable scientific accomplishment, a seventh-grade student from Minnesota has demonstrated that a common dietary fiber could offer an effective method for microplastics removal within the human digestive system. Isabella Garry, a middle schooler from Eden Prairie, conducted laboratory simulations showing that psyllium husk can remove up to 93.3 percent of microplastics from simulated stomach fluid in just 60 minutes.

Garry designed her experiment to address the rising global concern over microscopic plastic pollution. Microplastics—tiny polymer fragments resulting from the breakdown of commercial and synthetic products—are routinely ingested through drinking water, seafood, and everyday food packaging. Once inside the human body, these persistent particles pose uncertain long-term biological risks, including tissue inflammation and chemical toxicity.

To evaluate potential low-cost biological solutions, the young researcher constructed an experimental setup that replicated human stomach conditions, maintaining appropriate acidity and fluid motion. She then tested multiple plant-based mucilages and natural hydrogels to determine whether organic fibers could bind to suspended plastic pollutants and isolate them from gastric liquids.

Among the tested substances, psyllium husk demonstrated remarkably superior performance. Derived from the seeds of the Plantago ovata plant and frequently used in dietary fiber supplements, psyllium forms a dense gelatinous matrix when mixed with liquid. Within one hour, this natural gel successfully entrapped over nine-tenths of the synthetic micro-particles present in the fluid mixture.

The implications of Garry’s study could pave the way for novel dietary strategies aimed at minimizing plastic absorption in humans. While industrial filtration methods exist for environmental water treatment, safe, non-toxic, and biological approaches designed for organ protection remain largely unexplored in mainstream preventative health.

Although additional peer-reviewed clinical research will be necessary to confirm how these natural fibers function inside a living human gastrointestinal tract, the student’s innovation highlights the potential of nature-based remedies. Garry’s findings provide a practical baseline for future researchers seeking to mitigate the internal health impacts of pervasive environmental contaminants.