This is a topic occasionally popping up (frequently after some spectacular press article) but there doesn´t seem so much systematic research. Only recently I came across an article on plastic additives and surfactants (alkylphenols) that can suppress Th1 development – so is plastic the “Western life style factor”? The only other study that I have heard before is about benzophenone, octylphenol, and tributyltin chloride (TBT).