article_snippet: 7 chemicals in your food .
article_snippet: The credibility of Studies in experimental animals and Studies in experimental animals implications for human health remain hotly debated.
article_snippet: In the 1970s, for example, Ben Feingold, a physician in California, suggested that food additives caused children to become hyperactive.
article_snippet: Much of the evidence for the "Feingold hypothesis" rested on anecdotal reports by parents, whereas double-blind, controlled clinical trials produced contradictory results.