To answer my own question about iodine : > KI (potassium iodide) cannot protect the body from radioactive elements other than radioactive iodine—if radioactive

To answer my own question about iodine : > KI (potassium iodide) cannot protect the body from radioactive elements other than radioactive iodine—if radioactive iodine is not present, taking KI is not protective and could cause harm. Source : https://emergency.cdc.gov/radiation/ki.asp https://emergency.cdc.gov/radiation/ki.asp