Caesium-137 in food

The ingestion of 80,000 becquerel caesium-137 corresponds to an exposure of about 1 millisievert for adults.

The consumption of 200 grams of mushrooms with 2,000 becquerel caesium-137 per kilogram results in an exposure of 0.005 millisievert. This is considerably less than the radiation exposure during a flight from Frankfurt to Gran Canaria. However, if adults eat such a mushroom meal each week, they will receive an additional annual radiation exposure corresponding to about twenty flights from Frankfurt to Gran Canaria. Expressed in numbers it is 0.27 millisievert.