Walmart announced a recall on Tuesday for Great Value raw frozen shrimp products after the U.S. Food and Drug Administration detected a radioactive chemical that may pose a safety concern.

The FDA detected Cesium-137, a radioactive isotope of Cesium, on a single shipment of frozen shrimp imported from Indonesian company PT. Bahari Makmur Sejati.

C-137 is a byproduct of nuclear reactions, including nuclear bombs, testing, reactor operations and accidents. It's widespread around the world, with trace amounts found in the environment, including soil, food and air.

Walmart recalled products that tested positive for the chemical in 13 states: Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Missouri, Mississippi, Ohio, Oklahoma, Pennsylvania, Texas and West Virginia.

The level detected in the frozen breaded shrimp was far lower than FDA intervention levels (detected at 68 becquerels per kilogram versus the intervention level of 1,200 becquerels per kilogram).

The administration advises customers to be on the lookout for these product names, lot codes and best by dates:

Great Value brand frozen raw shrimp, lot code: 8005540-1, Best by Date: 3/15/2027Great Value brand frozen raw shrimp, lot code: 8005538-1, Best by Date: 3/15/2027Great Value brand frozen raw shrimp, lot code: 8005539-1, Best by Date: 3/15/2027

"If you recently purchased one of the impacted lots of Great Value raw frozen shrimp from Walmart, throw it away," FDA officials said in a release. "Do not eat or serve this product."

Long-lasting effects of Cs-137 include damage to DNA, which can elevate the risk of cancer, but only if the chemical is consumed through contaminated food or water over time.

"Avoiding products like the shipment FDA tested with similar levels of Cs-137 is a measure intended to reduce exposure to low-level radiation that could have health impacts with continued exposure over a long period of time," the FDA said in its statement.