The U.S. Customs & Border Protection (CBP) first detected the material in shipping containers at four ports located in the U.S., including Los Angeles, Houston, Miami and Savannah, Georgia. The discovery prompted the FDA's advisory and investigation.

Beyranevand says it’s possible that a particular food product could become contaminated if it was raised or farmed somewhere with elevated levels of Cs-137. Either way, she believes the breaded frozen shrimp recall is “definitely a cause for concern” for the food industry-at-large.

Some packages of Great Value frozen shrimp sold at Walmart are at risk for potential for Cesium-137 contamination, the FDA says.