Their layered, hollow structure can also trap small amounts of dirt and moisture, which means a very quick rinse may not always clean every surface thoroughly.
Before eating them raw, remove damaged outer layers and rinse the onions carefully under clean running water, paying attention to the roots and spaces between layers. Keeping produce and kitchen surfaces clean also lowers the risk of foodborne illness.
There is no need to avoid green onions altogether. They provide nutrients including vitamin K and antioxidant compounds such as quercetin, and proper washing lets you enjoy them while reducing unnecessary food-safety risks.
