ARS INFORMATION STAFF / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY ARS INFORMATION STAFF / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
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Nutrition research. Psychologist (right) performing an electroencephalogram (EEG) to measures responses from a volunteer's brain during a dietary study. This study is being carried out at the Grand Forks Human Nutrition Research Center, USA. Studies carried out here have shown that the trace dietary minerals copper and zinc are important for brain function.
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