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Increased Microplastic Intake from Fry-Cooked Fish Muscle Tissue
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Researchers compared how different cooking methods affect microplastic levels in fish muscle tissue and found that frying significantly increased microplastic abundance from 4 to over 36 particles per gram. Steaming and boiling did not cause significant changes in microplastic levels. The study identified PVC fragmentation during frying as a primary contributor and suggests that cooking methods should be factored into dietary microplastic exposure assessments.
The health risks of microplastic exposure have raised global concerns due to their ubiquitous presence. While current studies emphasize microplastic detection in seafood, the influence of cooking methods remains understudied, potentially biasing risk assessments. This study employed both laser direct infrared spectroscopy to detect microplastics larger than 20 μm and pyrolysis thermal desorption–gas chromatography–mass spectrometry to quantify microplastics exceeding 0.22 μm, aiming to comprehensively evaluate microplastic variations in fish muscle tissue after boiling, steaming, and frying. Frying significantly elevated microplastic abundance in fish muscle (p < 0.05), from 4.00 ± 3.01 to 36.43 ± 14.39 items/g (corresponding to 32.30 ± 11.20 and 58.09 ± 24.94 μg/g), whereas steaming and boiling showed no significant changes (p > 0.05). Notably, sub-20 μm microplastics were identified in fish muscle, with polyvinyl chloride fragmentation during frying as a primary contributor. These findings provide novel insights into cooking-induced microplastic dynamics in seafood, advancing risk assessments for dietary microplastic exposure.
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Increased MicroplasticIntake from Fry-Cooked FishMuscle Tissue
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Researchers examined over 1,000 fish from 37 species and found microplastics in the gills and guts of about 36-40% of fish, but none in muscle tissue. Fish from shallower waters and smaller fish had more microplastics. The study recommends that people eat only the muscle portion of fish and choose larger fish from deeper waters to reduce their microplastic intake, estimating that global per capita exposure from fish is about 56,000 particles per year.
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