Fukushima fallout? FDA issues urgent 'do not eat' warning for radioactive shrimp sold at major retailer | 19 Aug 2025 | Health regulators are urgently warning Americans to check their freezers after a radioactive substance was found in a popular bag of shrimp sold at Walmart. The FDA has told the public to avoid Great Value raw frozen shrimp due to contamination with Cesium-137, a radioactive isotope. Customs and Border Protection agents, who detected the radioactive isotope Cesium-137, or Cs-137, in shipping containers at four major U.S. ports, sounded the alarm to the FDA. The FDA tested the contents of the shipping containers and confirmed on Tuesday that the shrimp, which came from a company in Indonesia called BMS Foods, was contaminated. Once inside your body, Cs-137 acts as a long-term, internal source of radiation that significantly increases cancer risk.