On October 5, 2006, the CDC issued a complete PDF version of its important new research study which shows that American women -- and especially women with low iodine intake -- are at risk of hypothyroidism due to common exposure to the toxin perchlorate. The study is titled Environmental Health Perspectives: Urinary Perchlorate and Thyroid Hormone Levels in Adolescent and Adult Men and Women Living in the United States, and is by Benjamin C. Blount and other authors. The study was published by the Environmental Health Perspectives Branch (EHPB), National Institute of Environmental Health Sciences, National Institutes of Health, U. S. Department of Health and Human Services. Published Online October 5, 2006. You can download a copy in PDF format online here.