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In one of the most surprising studies of the year, new research has found a link between arsenic contamination in drinking water and a 50 percent reduction in breast cancer deaths.
Arsenic contamination is a serious health problem for many countries around the world, including China and Chile. But the new study suggests very tentatively that it may potentially have a medicinal effect against breast cancer.
The study looked at breast cancer deaths in a city in northern Chile called Antofagasta, which was inadvertently exposed to extremely high levels of arsenic in its water supply between 1958 and 1970.
The pollution was the result of switching to a geothermal water source originating in the Andes Mountains, but it was later found that the source contained more than 800 micrograms per litre of arsenic - a level 80 times higher than the safe level recommended by the World Health Organisation.
http://www.sciencealert.com/arsenic-in-drinking-water-linked-to-a-50-drop-in-breast-cancer-deaths
Arsenic contamination is a serious health problem for many countries around the world, including China and Chile. But the new study suggests very tentatively that it may potentially have a medicinal effect against breast cancer.
The study looked at breast cancer deaths in a city in northern Chile called Antofagasta, which was inadvertently exposed to extremely high levels of arsenic in its water supply between 1958 and 1970.
The pollution was the result of switching to a geothermal water source originating in the Andes Mountains, but it was later found that the source contained more than 800 micrograms per litre of arsenic - a level 80 times higher than the safe level recommended by the World Health Organisation.
http://www.sciencealert.com/arsenic-in-drinking-water-linked-to-a-50-drop-in-breast-cancer-deaths