August 2, 2005, Nature.com:
Arsenic levels in U.S. grown rice are on average 1.4 to 5 times
higher than in those grown in other regions of the world according
to a grain survey.
The survey team found U.S. rice to be higher in arsenic than rice
grown in Europe, India or Bangladesh. The arsenic was found at levels
that if consumed as part of subsistence diet it could exceed the
maximum recommended allowance by the World Health Organization (WHO).
The findings, while ultimately inconclusive due to survey size,
have lead several researchers to speculate as to the reason for
the results. Some of the possible explanations include: pesticide
residue from what were formerly cotton fields and natural geological
Arsenic in low doses does not cause any serious harm but there
is evidence long term intake could increase the risk of bladder
For the complete article go to: http://www.nature.com/news/2005/050801/full/050801-5.html