Vom Saal claims BPA leaching in SIGGs
Z Recommends - 9.3.09
Researcher Frederick vom Saal stated that four years ago, he conducted an unpublished test on SIGG bottles and found leaching in the parts-per-trillion range. In light of vom Saal’s statements in an article in The Star, Z Recommends was able to discuss test results they received from a different independent test conducted on a SIGG bottle with the old liner.
“The bottle was found to leach BPA at 1.25 micrograms per liter, which is roughly equivalent to 1.25 parts per billion. In relative terms, this is more than what vom Saal states he had found, although he has not yet provided many details of his tests. In absolute terms, both values are very, very small. Everyone - you included - is exposed to BPA at higher levels from other sources, many of them entirely outside of your control. Canned foods tested by the Environmental Working Group contained up to 385 ppb, and even if you avoid those, there are plenty of others. Labs testing water bottles for BPA have to correct for background BPA in the water - sometimes up to 2 ppb.”Our Take: We wanted to make sure to acknowledge this story that's been swirling around some media - the whole thing seems a bit weird and leaves us with more questions than answers. Why didn't vom Saal decide to publish his study four years ago, and why is he bringing it up now? Where are the details on the independent study cited by Z Recommends? (etc.)
The article does reaffirm the fact that leaching at anything below the 2ppb level is very minute. A Canada Health study helps put this in perspective, finding that the average bottled water contains 1.5 ppb of BPA.