A consumer shops at a high-end supermarket in Hong Kong, Chi [Getty Images]

CHINA - SEPTEMBER 26: A consumer shops at a high-end supermarket in Hong Kong, China, on Friday, Sept. 26, 2008. News that infant formula was contaminated with the industrial chemical melamine revived concerns among consumers already skittish by finds of malachite green dye in fish and pesticide residue on vegetables. (Photo by Paul Hilton/Bloomberg via Getty Images)

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