Monday, April 28, 2008

Bisphenol-A: only a start?

Bisphenol-A (BPA) is an infamous chemical celebrity these days. Our Canadian government was the first in the whole world to list this compound as toxic. I’m glad to see that sometimes, we are leaders… BPA is known as an endocrine disruptor, hence potentially causing damage, for instance, to our reproductive system, development and brain. BPA is present in high density plastic bottle (polycarbonate, the popular Nalgene(TM) bottle, baby bottles and the lining of metal cans) For those who had the chance to study harmful chemicals would know that a chemical itself is not sufficient to cause damage. For chronic exposure, both the nature of the compound and the sufficient concentration of the chemical are necessary. For adults, exposure to BPA is usually too small to be a concern and our liver can degrade the BPA. However, infant are particularly at risk, since their liver is too young to degrade this chemical and BPA concentration get higher in heated plastic baby bottles. Radio-Canada made a great report (check for “bouteille dangereuse”) last weekend on the matter, for those who can listen French, like every good Canadian J. They pointed out that BPA is only one of hundreds of endocrine disruptor that we use in our society and ends up in our water stream. The fishes and frogs are much more affected by those chemicals: where males are known to be changing sex, their reproductive abilities highly limited and high death rates… I think it is time for a big clean up in our food/chemical industries…

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