Study says Qi601 can capture microplastics in a first human test

A peer-reviewed study in Frontiers in Microbiology says Quorum Innovations’ Qi601 physically bound microplastics in a human proof-of-concept test and reduced plastic transfer in lab digestion models. The findings point to a new gut-based strategy aimed at limiting how much micro- and nanoplastic exposure can reach intestinal cells.

Why it matters: - Micro- and nanoplastics are already found in air, water, food and human tissues. - The study suggests a new way to reduce what the body absorbs: physically sequester plastic particles before they reach intestinal cells. - If larger human trials confirm the early findings, Qi601 could become a barrier-protection approach for exposure that is hard to avoid in daily life.

What happened: - Researchers reported the first human in-vivo proof-of-concept evidence of a technology intentionally designed to capture microplastics. - The peer-reviewed study, titled “Postbiotic sequestration of micro- and nanoplastics: in vitro intestinal epithelial protection and proof of concept in the human mouth,” was published in Frontiers in Microbiology on September 21, 2026. - The human proof-of-concept work tested Qi601, a proprietary heat-inactivated postbiotic developed by Quorum Innovations to bind microplastics in the gut. - In the human study, microplastic particles released from chewing gum were observed physically associated with Qi601 agglomerates in saliva. - The study says roughly 91% of plastics in the mouth were bound by Qi601 in saliva compared with gum-only samples.

The details: - Qi601 is a non-viable, heat-inactivated postbiotic derived from Limosilactobacillus fermentum LfQi6. - The material does not need to stay alive, reproduce or colonize the intestinal tract. - Qi601 forms large biofilm-derived agglomerates that can bind micro- and nanoplastic particles. - In simulated oral, stomach and intestinal digestion, Qi601 produced about 92% depletion of free nanoplastic-associated fluorescence from surrounding liquid. - The aggregates were described as too large to be absorbed across the gastrointestinal tract. - When nanoplastics were first captured within Qi601 agglomerates, transfer of nanoplastic-associated fluorescence to human intestinal cells fell to 0.057% or less. - The study says the captured particles were not transferred to human cells. - The LfQi6 source of Qi601 has been determined to be Generally Recognized as Safe for its intended use. - The U.S. Food and Drug Administration issued Quorum a GRAS Notice, GRN 000988. - The study frames the approach as “postbiotic sequestration,” or intercepting micro- and nanoplastics in the gastrointestinal environment before absorption. - The company says the technology is intended to support excretion of retained plastics through the digestive tract.

Between the lines: - The research shifts the conversation from detecting plastics in the body to trying to block their uptake. - The human data are early and limited, but they provide a direct proof-of-concept signal rather than only cell or lab-model results. - The study also tries to address a concern with live probiotics: Qi601 is non-living, so it is designed as a physical barrier rather than a colonizing organism. - Quorum Innovations is tying the work to its broader barrier-defense platform, including prior Defense Advanced Research Projects Agency awards for chemical and biological threat protection. - The company also says it holds more than 55 patents in the U.S. and internationally.

What's next: - Larger controlled human studies are underway to test clinical efficacy. - Future work will also examine the gastrointestinal fate and elimination of particles captured by Qi601. - More information is available in the published study: the published study. - Quorum Innovations lists additional web sources at Qi601.com, MyGutGuardian.com and Quoruminnovation.com.

The bottom line: - Qi601 has early human proof-of-concept data suggesting it can physically bind microplastics, but the real test will be whether larger studies show meaningful protection in people.