The U.S. Food and Drug Administration has issued a consumer warning after frozen shrimp imported from Indonesia was found to be contaminated with cesium-137, a radioactive isotope with a half-life of about 30 years. The alert followed detections by U.S. Customs and Border Protection officials at multiple entry points, including Los Angeles, Houston, Savannah, and Miami. Laboratory tests confirmed that breaded shrimp from the company PT. Bahari Makmur Sejati, also referred to as BMS Foods, carried measurable amounts of cesium-137. Although the contaminated shipment was stopped from entering the U.S. market, the FDA has determined that other shrimp imported from the same company under similar conditions could pose a safety concern.
The FDA has instructed consumers not to eat specific Great Value frozen raw shrimp products sold at Walmart. The affected products are two-pound bags of raw white vannamei shrimp, EZ peel, tail-on, farm-raised, with a best-by date of March 15, 2027. The lots under the advisory carry the codes 8005540-1, 8005538-1, and 8005539-1. Distribution records show that these shipments reached stores in Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Missouri, Mississippi, Ohio, Oklahoma, Pennsylvania, Texas, and West Virginia. While no positive results have been reported from testing these lots, the FDA has concluded that conditions at the supplier allowed for possible contamination, warranting a recall.
Cesium-137 is not naturally present at harmful levels in seafood. Its presence is linked to nuclear fission processes and has historically been associated with fallout from nuclear accidents and weapons testing. Once released, cesium-137 disperses easily in water, binds to sediments, and is absorbed by marine organisms. In humans, the isotope behaves like potassium and distributes throughout soft tissue, where it continues emitting beta and gamma radiation. Over time, this exposure can damage DNA and raise the risk of cancers. The FDA confirmed that the shrimp sample tested at the border did not carry levels high enough to cause immediate illness. The concern arises from repeated or long-term consumption, where cumulative exposure could significantly increase health risks.
The FDA has placed PT. Bahari Makmur Sejati on an import alert for chemical contamination. This action prevents additional shipments from entering the country until the company can demonstrate compliance with food safety regulations. The agency stated that the products were prepared and held under conditions that created the opportunity for contamination with cesium-137, a direct violation of the Federal Food, Drug, and Cosmetic Act. Investigations are now underway in cooperation with Indonesian regulatory authorities to determine how radioactive material was introduced into the supply chain.
The discovery underscores vulnerabilities in the global seafood trade. More than 80 percent of shrimp consumed in the United States is imported, with Indonesia among the leading suppliers. The safety of this supply depends on adherence to strict farming and processing standards abroad. When those standards are not met, responsibility shifts to border inspections and FDA oversight to prevent unsafe products from entering U.S. markets. In this case, detection occurred only after containers reached American ports, a reminder of the risks inherent in complex international supply chains.
The FDA’s advisory places special focus on cumulative risk. Trace amounts of cesium-137 exist in the environment worldwide due to atmospheric nuclear testing and accidents such as Chernobyl and Fukushima. These background levels are typically far below thresholds of concern. However, when elevated levels appear in food products, regulators must account for the possibility of repeated consumption adding to a person’s total radiation dose. Medical imaging and routine exposure already contribute to individual radiation totals. A contaminated food product that enters regular diets could raise lifetime cancer risks in ways that may not be immediately visible.
Consumers have been urged to check packaging for the affected lot codes and to discard any product that matches. The FDA clarified that returning the shrimp to Walmart for a refund is also acceptable. The key instruction is that the shrimp should not be eaten or served under any circumstances. Walmart has been cooperating with the FDA’s directive and is expected to remove affected products from store shelves in the listed states.
The broader implications extend beyond consumer safety. Indonesia’s seafood exports represent a major economic sector, and this development could trigger increased scrutiny of other exporters from the region. Importers in the United States may now face more frequent inspections, and retailers could shift supply chains to avoid risk. For BMS Foods, the import alert essentially shuts down access to the U.S. market until substantial corrections are made.
Food safety experts point to the unusual nature of this incident. Recalls are common for bacterial contamination such as Salmonella or Listeria, but radiation contamination is rare. Unlike bacteria, radioactive isotopes cannot be neutralized by cooking or freezing. Once present, the only remedy is to prevent the food from entering the supply chain altogether. This raises the stakes significantly, because the consequences extend beyond acute illness to long-term health risks that may only manifest years later.
The history of cesium-137 contamination in food highlights why regulators move quickly in cases like this. Following the Fukushima nuclear disaster in 2011, fish off the coast of Japan tested positive for elevated cesium-137 for years, prompting strict monitoring programs. While no connection between Fukushima and the current Indonesian case has been suggested, both demonstrate how persistent and mobile the isotope is once it enters marine environments. It dissolves in seawater, travels long distances, and accumulates in fish and shellfish. These properties make it a particularly concerning contaminant.
The FDA’s communication emphasizes transparency with consumers. By issuing a public alert at an early stage, even before all testing was complete, the agency reinforced its role in preventing contaminated products from reaching households. The agency is continuing to collect information from distribution networks and working to ensure that all implicated shrimp is traced and removed. The import alert effectively stops new shipments while investigations continue.
For consumers, the message is straightforward. If you purchased Great Value frozen raw white vannamei shrimp with the specified lot codes and best-by date, do not eat it. Discard the product or return it to Walmart. While only one shipment has tested positive, the FDA has concluded that conditions at the supplier make other batches unsafe.
The case also highlights the balance between international trade and food safety enforcement. The global seafood market relies on high volumes of imports from regions where regulatory oversight may differ from U.S. standards. As this event demonstrates, lapses in sanitary practices or exposure to contaminated environments abroad can have direct consequences for American consumers. The FDA’s system of alerts and inspections is designed to catch such cases, but the potential for contamination to slip through remains an ongoing concern.
The scientific aspect adds further weight to the warning. Cesium-137’s long half-life means that once introduced into ecosystems, it remains hazardous for decades. It emits both beta and gamma radiation, which can penetrate tissues and alter cellular structures. Unlike some contaminants that degrade or dissipate quickly, cesium-137 lingers and continues to pose risks over time. This is why its detection in shrimp imported for human consumption could not be ignored.
As investigations continue, regulators will work with Indonesian authorities to determine the contamination pathway. Whether the shrimp were exposed through water, processing facilities, or another source is still unknown. Until those details are clarified, the U.S. import ban on BMS Foods remains in place.
This development stands as a reminder of the need for vigilance in monitoring global food supplies. The detection of cesium-137 in shrimp shipments intended for U.S. consumers underscores how food safety threats can arise from unexpected sources and demand immediate response. Consumers in the affected states are advised to take the warning seriously and avoid any shrimp matching the lot codes under advisory.
Source: FDA
