Dr. Joseph Mercola – People who have moderate-to-severe iodine deficiencies and higher fluoride levels may be at an increased risk for underactive thyroid gland activity.
More than 66 percent of the U.S. population drinks water with added fluoride,[1] despite the fact that studies continue to question its safety and usefulness for its stated purpose: preventing cavities. A number of countries — including Germany, Sweden, Japan, the Netherlands, Finland and Israel — have already stopped this hazardous practice, but many Americans are still at risk.
In Canada, nearly 39 percent of the population also receives fluoridated drinking water (compared with only about 3 percent of Europeans).[2] It’s been known for years that fluoridated water consumption is linked to thyroid dysfunction and behavioral problems like attention deficit hyperactivity disorder (ADHD), and two new studies have added to the already apparent associations.