by Marion Nestle
Oct 1 2010

Bisphenol A (BPA): the fuss goes on and on

At current exposure levels, is BPA toxic or not?  The question turns out to be difficult to answer for two reasons: science and politics.  Science does not have an easy way to determine the health effects of exposures to very low doses of chemicals, and the plastics industry does everything it can to minimize risks.

A recent study says that human exposure to BPA is much higher than previously estimated, not least because many of the sources of this estrogen disrupting chemical have not yet been identified.   The authors of the study, according to FoodQualityNews, want the chemical registered so that exposures can be assessed.  They also call for immediate action to reduce exposures.

In contrast, FoodProductionDaily reports that the European Food Safety Authority (EFSA) has just ruled that current exposure levels are safe.  Its expert panel reviewed  hundreds of studies of BPA’s effects over a six-month period.  The committee could find no new evidence for setting a lower level for the Tolerable Daily Intake, now established at 0.05 mg/kg/body weight.  But at least one member of the committee disagreed and viewed the evidence as less certain.  As FoodProductionDaily explains:

Bisphenol A is a chemical used as a monomer in polycarbonate plastic and epoxy resins – two food contact materials used in the manufacture of baby bottles and food and drink can linings respectively. Its continued use is a matter of fierce debate, with scientific evidence divided on the issue. In January 2010, the US Food and Drug Administration (FDA) said the substance was safe at current exposure levels. It also recommended that children and pregnant women reduce their exposure to the substance and that industry should seek to develop BPA-free materials for use in food contact materials.

As might be expected, the plastics industry is delighted with the EFSA decision.  FoodProductionDaily quotes a representative of the chemical industry:

Consumers around the world can be reassured that EFSA’s intense scientific scrutiny continues to reaffirm the safety of BPA in food contact applications, and again concludes that established safe intake levels for BPA provide a sufficient margin of safety for protection of consumers, including for infants and young children.

Aren’t you reassured by this?

Glass baby bottles, anyone?

Update, October 4France and Denmark say that unless EFSA requires lifting their bans on BPA, they intend to keep the bans.

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  • Cathy Richards

    Voluntary measures will not work until industry sees monetary value in going BPA-free. A BPA-free label would likely give a company a distinct advantage on the grocery shelves.

    Marion — can you comment on current labelling rules re: BPA claims? I’m pretty sure Eden foods uses BPA free liners in their canned products, but have not seen this claim on their labels. That makes me wonder if they are not allowed to make such claims.

  • Cathy Richards
  • RZ

    Did a fair amount of reviewing the literature on BPA. It sounds like there is growing acknowledgment that the risk to young children is real but there the jury is out on the effects on older children and adults.

  • Concerned Chemist

    Actually many manufaturers are or have switched to BPA free liners. The problem is that not all of the brands packed into the standard cans have been switched or approved so companies are reluctant to mention any claims for fear of a product coming out with BPA in a “BPA Free” container. i.e. SIGG.
    Not all of Eden products are in BPA free lined cans.
    Some are (like black beans) have a specific label.
    Keep in mind, many BPA free packed cans are showing trace amounts of BPA coming from the filling process, the water and the food that is used (already being contaiminated at the levels being examined).
    BPA can be found in the parts per trillion in some public water supplies and even naturally caught fish. It has been estimated that every person has about 4 parts per billion of BPA in their systam at any given time.

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