[dbbeebs]

"Potassium iodide is an antidote for radiation poisoning."
This only protects against the uptake of radio-active iodine.
"Please explain that."

Gladly. Nuclear bombs and reactors produce radioactive isotopes (split atoms). One of these isotopes is Iodine 131. If you take potassium iodide before or during exposure to I-131, it limits the damage to your thyroid, which accepts iodine from your system. Potassium iodide is NOT a cure-all.

[Larousse2]

Thank you very much for replying:-)