Progress in the Study of Microplastics Contamination in Dairy Products

Microplastics (MPs) in food have aroused widespread concern, and it has been clarified that MPs have toxic effects on cells, animals and human organoids, and that the cytotoxicity is inversely proportional to the particle size of MPs, and positively proportional to the concentration of MPs and the time of exposure; in experimental animal models, the toxic effects of MPs mainly occur in the digestive, nervous, respiratory, reproductive, and cardiovascular systems; the hazardous effects of MPs have also been identified in the human organoids of liver, intestine, heart and brain. The contamination of MPs in dairy products may occur at different stages of the production process. This paper reviews the sources, toxicological effects and detection methods of MPs contamination in dairy products, with the aim of providing a reference for the risk prevention and control of MPs in dairy products and for future research.