September 3, 2019
- A U.S. and Canadian government-funded observational study found that drinking fluoridated water during pregnancy lowers children’s IQ
- A 1 milligram per liter increase in concentration of fluoride in mothers’ urine was associated with a 4.49-point decrease in IQ among boys only, while a 1-mg higher daily intake of fluoride was associated with a 3.66 lower IQ score in both genders between ages 3 and 4
- The findings were hotly criticized by pro-fluoride agents, including the American Council on Science and Health (ACSH) and the Science Media Centre (SMC), two well-known front groups for the chemical industry
- There are at least 60 other studies showing fluoride exposure damages children’s brains and lowers IQ. There are also more than 2,000 other studies detailing other health effects
- Research published in 2017 found that, compared to a mother who drinks fluoride-free water, a child of a mother who drinks water with 1 part per million of fluoride can be predicted to have an IQ that is 5 to 6 points lower. They also found there was no threshold below which fluoride did not affect IQ
The August 19, 2019, issue of JAMA Pediatrics1 delivered an unexpected bombshell: A U.S. and Canadian government-funded observational study found that drinking fluoridated water during pregnancy lowers children’s IQ.
The research, led by a Canadian team of researchers at York University in Ontario, looked at 512 mother-child pairs living in six Canadian cities. Fluoride levels were measured through urine samples collected during pregnancy.
They also estimated the women’s fluoride consumption based on the level of fluoride in the local water supply and how much water and tea each woman drank. The children’s IQ scores were then assessed between the ages of 3 and 4. As reported by the Fluoride Action Network (FAN):2
“They found that a 1 mg per liter increase in concentration of fluoride in mothers’ urine was associated with a 4.5-point decrease in IQ among boys, though not girls.
When the researchers measured fluoride exposure by examining the women’s fluid intake, they found lower IQ’s in both boys and girls: A 1 mg increase per day was associated with a 3.7 point IQ deficit in both genders.”
Support for the importance of this study
The findings were deemed so controversial,