Letters Section Editor: Robert M. Golub,
MD, Senior Editor.
To the Editor: The Brief Report by Dr Larsson
and colleagues1 concluded that magnesium intake
was inversely associated with the risk of developing colorectal cancer in
women. In estimating the magnesium intake, food content of this metal ion
appears to have been appropriately measured. However, the content of magnesium
in local drinking water was not assessed. Variations of the magnesium content
of water in the geographical area that was investigated are considerable.2
Wiklund L, Pousette J, George M. Magnesium Intake, Drinking Water, and Risk of Colorectal Cancer. JAMA. 2005;293(21):2599. doi:10.1001/jama.293.21.2599-a
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