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United States Department of Agriculture

Agricultural Research Service

Image Number D2837-9

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Image Number D2837-9

A new vitamin B12 assay developed by ARS scientists at the Western Human Nutrition Research Center, Davis, California, requires only a tiny drop of blood rather than a standard 1-milliliter sample.


Photo by Stephen Ausmus.

640 pixels wide: (d2837-9.jpg)

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Last Modified: 3/27/2013
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