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  • Researchers: A salad’s nutrition may vary by time of day add to reading list  

    Posted on June 20, 2013 at 8:56 PM

    Updated Thursday, Jun 20 at 9:59 PM

    Vegetables have an internal clock that controls the production of chemicals that help fight cancer in humans and help defend the plant from insects, Rice University researchers said.

    By Vicente Arenas / KHOU 11 News

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