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United States Department of Agriculture

Agricultural Research Service

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Image Number D2474-1

Chemist Pei Chen prepares extracts from teas and tea-based dietary supplements to study differences in phytochemicals (health-protecting compounds) in the two forms of tea.


Photo by Peggy Greb.

640 pixels wide: (d2474-1.jpg)

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Last Modified: 3/14/2017
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