The FDA has issued multiple warnings regarding possibly radioactive frozen shrimp sold at Walmart, particularly under the Great Value brand. Shoppers in 13 states, including Pennsylvania, Minnesota, Iowa, and South Dakota, are advised to check their freezers and avoid consuming these products due to potential radiation contamination. Samples flagged for contamination contain cesium-137, raising serious health concerns about elevated cancer risks associated with ingestion. The FDA has urged Walmart to recall these shrimp and has advised consumers to discard any suspected products.