By Sarah Knapton, Science Editor 
Around 15,000 people could be suffering needlessly from thyroid problems because of fluoride in drinking water, the University of Kent has warned.
Fluoride could be causing depression and weight gain and councils should stop adding it to drinking water to prevent tooth decay, scientists have warned.
A study of 98 per cent of GP practices in England found that high rates of underactive thyroid were 30 per cent more likely in areas of the greatest fluoridation.
It could mean that up to 15,000 people are suffering needlessly from thyroid problems which can cause depression, weight gain, fatigue and aching muscles…
