This sounds like the scare over thimerosal all over again. Parents, and others, insisted (and some still do) that the preservative used in some vaccines caused autism. And we all know how that debacle turned out (years of effort and money looking for a link all the while subjecting children to some pretty uncomfortable and often dangerous "treatments"). Now here again we have parents and their supporters asserting that the big bad scary chemicals are messing up their kids, researchers saying that umm no the evidence doesn't suggest any such thing, and government regulators ready to appease. F.D.A. Panel to Consider Warnings for Artificial Food Colorings Renee Shutters, a mother of two from Jamestown, N.Y., said in a telephone interview on Tuesday that two years ago, her son Trenton, then 5, was having serious behavioral problems at school until she eliminated artificial food colorings from his diet. “I know for sure I found the root cause of this one because you can tu...