-Caveat Lector-
Heinz Admits Lining Its Cans With
Endocrine-Disrupting 'Sex Chemical'
By Jonathon Leake
http://www.sunday-times.co.uk/news/pages/sti/2001/02/11/stinwenws01009.html
2-11-1
Heinz has been criticised by environmentalists after
admitting lining its food cans with a chemical
thought to mimic female hormones.
In animal experiments researchers have found that
the chemical, bisphenol A, can cause early puberty
in females and may reduce the growth of
reproductive tissues in young males.
"This chemical is a known endocrine disruptor and
is found in a range of other common domestic
products besides Heinz's tins," said Dr Michael
Warhurst who is leading a Friends of the Earth
campaign to highlight the issue. "It is one of many
chemicals to which we are constantly exposed and
which are increasingly linked with various illnesses."
Heinz confirmed that it uses very small amounts of
bisphenol A to line the lids of cans fitted with
ring-pull openers, including baked bean cans. The
chemical helps to prevent such tins from corroding
or releasing tin into the food.
Bisphenol A and most other endocrine disrupting
chemicals are known toxins at high levels. The
argument is about whether or not they are
dangerous in very low levels, when they are known
as micropollutants.
Heinz says it accepts that tiny amounts of bisphenol
A may leach into its foods, but says levels are far
below what is needed to cause any biological effect.
"The levels are in parts per million or parts per
billion, so small as to be almost undetectable," said
a spokesman.
Tin cans are just one of many potential sources of
bisphenol A. The metal is also used in soft plastics,
pesticides, dental products and some baby bottles.
A 1999 study by American researchers found that
bisphenol A could mimic the sex hormone estradiol.
Mice exposed before birth to the chemical, in
amounts correlating with typical human exposures,
suffered changes in postnatal growth and early
puberty in females.
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