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The World Health Organization has recommended against adding potassium iodate to flour since 1965, yet the EWG lists more than 600 products that include potassium iodate, including Sara Lee hot dog buns, Safeway’s Signature Select whole wheat bread and Oroweat Italian bread.

“A number of other companies have switched from potassium bromate to potassium iodate in their bread, but potassium iodate is not well tested and may also pose a slight cancer risk,” Lefferts said.

The World Health Organization has recommended against adding potassium iodate to flour since 1965, yet the EWG lists more than 600 products that include potassium iodate, including Sara Lee hot dog buns, Safeway’s Signature Select whole wheat and Oroweat Italian bread.

Raw iodine prices remained high for two years, forcing the Indian companies that make potassium iodate to plead for donor help.

As salt is cleaned and packaged, potassium iodate may be sprayed on it, normally at a cost of only a dollar or two per ton.