Since the food laws are behind like the IT ones, I guess that the USA and Kenyan maize millers have been colluding to take advantage that they are not required to indicate when stuff contains GMO ingredients. 

Is there a particular maize miller that does not deploy GMO maize in their flour?

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with Regards:

The Chinese are known to be entrepreneurs, and coupled with some imagination, are now playing the role of nature in food and beverage production. http://gramware.blogspot.com/2011/01/chinese-way-to-become-imaginative.html