Toxic Curiosity: Public Health Interest in Microplastics Across a Polluted World

Abstract Background Emerging environmental contaminants with Microplastics are increasing human health implications. While studies confirm their presence in various human tissues and fluids, public perception of this issue has not been thoroughly explored. Objective This study investigates the relationship between public concern about microplastics, measured through Google Trends search behavior, and single-use plastic waste generation, using the Plastic Waste Makers Index. Methods We employed a correlational infodemiology design to analyze the average five-year Relative Search Volume (RSV) of the term "microplastics" across 56 countries and compared these values to national single-use plastic waste generation per capita. Pearson correlation analysis was used to evaluate the strength and significance of the relationship. A qualitative review of health-related search queries was also conducted. Results A moderate, statistically significant positive correlation was observed between RSV and per capita plastic waste (r = 0.434, p < 0.001), suggesting that higher waste-producing countries exhibit greater public engagement with microplastics. Health-related queries were most prevalent in Singapore, Australia, Japan, New Zealand, and the United States, with commonly searched terms related to microplastics in blood, brain, breast milk, placenta, reproductive organs ,and relationships with cancer, heart attacks ,and infertility. Conclusion Public interest in microplastics correlates with national plastic pollution levels and reflects growing health concerns. Infodemiological data may serve as a powerful and cost-effective tool for identifying regions receptive to public health interventions and promoting awareness campaigns tailored to regional concerns.