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Diet has a substantial impact on chronic disease and health. Elliot and
Ong (p 1438) describe the field of nutritional genomics, which
could lead to an explanation of the bioactivities of food constituents.
The greatest potential, they say, is likely to be in health maintenance
and blocking the early stages of disease development through targeting
the genes responsible for disease with
nutritional agents. Such work will be complicated by the fact that the
natural components of food can have both beneficial and adverse
effects.

(Credit: KEITH WELLER/A.R.S.)