Calculate Your Risk of Exposure

 
All radiation is cumulative.

The more radioactive isotopes you are exposed to, the more accumulates in your body. The best way to block radioactive isotope uptake is to eat a diet rich in minerals. 

If you live in the Northern Hemisphere, then please check out these links to the Norwegian Institute of Air Research to calculate your risk of exposure.

Exposure to Cesium 137 in the Northern Hemisphere.

Exposure to Iodine-131 in the Northern Hemisphere.

In the meantime, eat low on the food chain, like a sensible Daniel fasting diet and stay away from things like, leafy vegetables, dairy products and beef, for now, at least until this Fukushima disaster is under control.