Salt from sneezing iguanas
Sorry for my English.
I was in a supermarket searching for iodine tablets after a nuclear accident at a US military base. Before buying them I received a phone call from a friend advising me to not get them, because I'm too old and they can damage the thyroid.
He told me to go to the spice aisle and buy salt sneezed by Iguanas. There I was instructed to go to an animal shelter because the salt needed to be "fresh". At the animal shelter (located in the supermarket) a guy told me that the salt could not protect me from the radioactive iodine, but it was a delicatessen and therefore worth buying.
I complained that it looked (and probably tasted) like common table salt. The guy made a tomato bruschetta with abundant salt to prove that I was wrong but I was more interested in seeing the iguanas (I couldn't, apparently the radiation "upset them").