American Heart Association Jun 18 2025 Living in a U.S. coastal county bordered by ocean waters with very high concentrations of microplastics may increase the risk of heart and metabolic diseases, such as Type 2 diabetes, coronary artery disease and stroke. This risk was higher compared to residents of coastal counties with low levels of microplastic pollution in nearby waters, according to new research published today in the Journal of the American Heart Association, an open-access, peer-