摘要：Mounting evidence that diet
can have profound and
long-term effects on
health has sparked concerns about
the quality of Americans¡¯ diets.
Many private and public campaigns
have tried to educate the public
about healthful diets. A key requirement
for the success of these efforts
is that individuals are able to assess
their dietary quality accurately, a
difficult requirement because it
assumes that people know the kinds
and amounts of nutrients in the
foods they eat and what constitutes
a healthful diet. Campaigns to promote
healthful diets will be of no
use if people falsely believe their
diets are healthful enough.
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