Microplastic contamination of food: sources, detection methods, and health implications

Microplastic contamination in food has emerged as a significant global concern, with potential implications for human health. Microplastics, defined as plastic particles smaller than 5 mm, originate from various sources, including plastic waste fragmentation, synthetic textiles, and industrial processes. These particles have been detected in multiple food products, particularly seafood, drinking water, salt, honey, and processed foods, posing a risk of chronic exposure through ingestion. The small size of microplastics allows them to penetrate tissues and potentially enter systemic circulation, raising concerns about their bioaccumulation and toxicological effects. This review provides a comprehensive analysis of the pathways through which microplastics enter the food chain, focusing on contamination in aquatic ecosystems and food packaging. We also examine the analytical techniques used for detecting microplastics in food, including spectroscopic methods, and discuss the challenges of standardizing detection protocols. Finally, the potential health risks, including toxicity and chemical leaching, are explored, alongside recommendations for future research and regulatory strategies.