Studies carried out in the US and Canada have shown that very low levels of the toxin can alter cell function in animals and there is now a fear that Bisphenol A could affect the reproductive, neurological and immune systems of developing babies.
The risk of the chemical leaching into liquid depends on temperature. Heating bottles, pouring hot liquids into them and using bottles which have been scratched and repeatedly washed all increase this risk. Bottles have been found not to leach Bisphenol A at room temperature.
In the UK the National Childbirth Trust has been quick to support Canada's action. It is now campaigning for a labelling system, making it easy for parents to identify which bottles contain the chemical.
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