Evidence found lacking in chemosphere study

three ideas to help you create like a pro app development companiesA study recently published online by the journal

Chemosphere (Zalko et al, 2010) has attracted some media attention for its claims that BPA from thermal paper is efficiently absorbed through the skin, where it is converted to water-soluble metabolites (byproducts of BPA, once it is metabolized in the human body).  These byproducts are known to be completely lacking in estrogenic activity and are efficiently excreted from the body in urine.

The authors claim the inactive BPA metabolites are then re-converted into an estrogen-active substance, and that this process “contributes substantially” to BPA exposure due to breakdown of the metabolite and release of free BPA within the body.

This is a very troubling conclusion, as the authors provide no evidence that inactive BPA metabolites are reconverted into estrogenic BPA in the human body.  Therefore, this appears to be simply speculation on the part of the study’s authors.