https://www.guardian.co.uk/society/2005/jun/12/medicineandhealth.genderissues
Fluoride in tap water can cause bone cancer in boys, a disturbing new study indicates, although there is no evidence of a link for girls.
New American research suggests that boys exposed to fluoride between the ages of five and 10 will suffer an increased rate of osteosarcoma – bone cancer – bet-ween the ages of 10 and 19.
In the UK, fluoride is added to tap water on the advice of bodies such as the British Dental Association. The Department of Health maintains that it is a cost-effective public health measure that helps prevent tooth decay in children.
About 10 per cent of the population, six million people, receive fluoridated water, mainly in the Midlands and north-east, and the government plans to extend this, with Manchester expected to be next. About 170 million Americans live in areas with fluoridated water.