British study shows link between flouride in water and thyroid disfunction

Their finding supports the epidemiological evidence from numerous other studies worldwide that have similarly found that fluoride in drinking water can impair thyroid function. While the study was conducted in the UK and was remarkably the first ever population level study to investigate this association, many people in Ireland appear to be unaware that hypothyroidism is a major public health problem in this country, with prevalence rates much more serious than the UK.