A University of Michigan study has revealed that the majority of Haiti's staple food supply, U.S. rice exports, contain unhealthy levels of arsenic and cadmium. These heavy metals, found to be nearly twice as high in imported rice compared to locally grown rice, can increase the risk of cancer and heart disease. Some samples even exceeded international limits. The study has prompted calls for an ethical investigation into U.S. rice exporters and for measures to bolster Haiti's agricultural sector.