Dr. Philippe Grandjean, one of the co-authors, has spent the last several decades researching chemicals that can damage the developing brain. His research began with lead and mercury, and he now says there is a list of at least a dozen “bona fide brain drainers.”

Here is the Dirty Dozen:

1) Methylmercury

2) lead

3) arsenic

4) PCBs

5) toluene

6) ethanol

7) manganese

8) fluoride

9) DDT

10) chlorpyrifos

11) tetrachloroethylene

12) polybrominated biphenyl ethers