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In this article researcher S. Jill James implicates low glutathione and heavy metal exposure in autism. This may be the case, but glutathione has a number of important functions that have nothing to do with heavy metal binding. As an antioxidant, glutathione reduces toxic free radicals. Glutathione is also a key factor in the maintenance of cellular redox poise. It goes without saying that it is also possible that low glutathione is correlated with, but not causative of, autism.