Previous research found that insects can ingest and absorb pure, unrefined microplastics -- but only under unrealistic, food-scarce situations. Zoologists have now tested mealworms in a more realistic scenario, feeding them ground-up face masks -- a common plastic product -- mixed with bran, a tastier option. After 30 days, the research team found the mealworms ate about half the microplastics available, about 150 particles per insect, and gained weight. They excreted a small fraction of the microplastics consumed, about four to six particles per milligram of waste, absorbing the rest. Eating microplastics did not appear to affect the insects' survival and growth.
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