If you're eating protein, you could be ingesting hundreds of tiny pieces of plastic each year, research finds. A new study by researchers with the nonprofit Ocean Conservancy and the University of Toronto found microplastics - tiny particles ranging from one micrometer (one thousandth of a millimeter) to half a centimeter in size - in nearly 90 percent of protein food samples tested.Subscribe to The Post Most newsletter for the most important and interesting stories from The Washington Post. The