Miso (Kosher Certified) Paste is what the Japanese did to protect themselves from the effects of Radiation Poisoning in 1945. You can make nice Miso Soup and add Vegies to it- yum. Let Food Be Your Medicine.
The Japanese were not concerned about Kashrus, Posters on Yeshiva World are. Miso Paste is Fermented, and I read Fermented Foods are helpful in Protecting one from Radiation. Say lots of Tehilim, and ask Hashem for a healing.