Increasing dietary fiber intake (fermentable and non-fermentable) can reduce the absorption of microplastics by creating a protective barrier in the intestine or by accelerating their elimination.

noli's read

The idea that fibers might interact with microplastics relies on biological mechanisms that are plausible but still largely explored in laboratory settings. In vitro (test tube) studies and animal models do suggest that certain types of fibers can bind to microplastics, potentially limiting their interaction with the intestinal wall. However, extrapolating these results to humans remains premature, as there are no clinical trials (RCT) confirming a significant reduction in microplastic absorption in humans through fiber intake. The 'gel barrier' or transit acceleration mechanism is a hypothesis consistent with digestive function, but it is not yet validated as an established clinical defense strategy. Current research, such as that discussed in journals like 'Journal of Hazardous Materials', underscores the need for more robust evidence before concluding that this provides effective protection. It is therefore accurate to say that fiber supports digestive health, but asserting that it constitutes a 'defense' against microplastics is an enthusiastic interpretation of preliminary data.

the sources

1. 1Reynolds A et al. 2019