2011年5月1日日曜日

Minute levels of radiation detected in breast milk

Japan's Health Ministry says it has detected a minute amount of radioactive materials in breast milk in 7 mothers in central and northeastern Japan. The ministry says the amount does not pose a danger to their babies' health.

The ministry on Saturday released the results of a study conducted in Fukushima, Tokyo and other 3 prefectures in Kanto region from last Sunday through Thursday.

The ministry says breast milk samples from a mother in Iwaki City of Fukushima Prefecture contained 3.5 becquerels of radioactive iodine per kilogram and 2.4 becquerels of radioactive cesium per kilogram.

Up to 2.8 becquerels of radioactive materials per kilogram were also detected in 6 mothers in 2 other prefectures.

Japan has no regulatory levels to determine the health risk from radioactive substances in breast milk. But it sets the safety levels for babies' consumption of milk and drinking water at 100 becquerels of radioactive iodine per kilogram and 200 becquerels of radioactive cesium per kilogram.

The detected amount in the samples was much lower than the regulatory levels and the ministry says it is too minute to have any impact on babies' health. It also says mothers who are breast-feeding should not be overly concerned.

Professor Nobuya Unno of Kitasato University says it is necessary to carefully analyze how and for how long radioactive materials will affect breast milk when mothers drink water and eat food that contain such substances.

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