New turn in cancer and vitamin D debate

The suggestion that vitamin D supplementation may help to ward off cancer has been thwarted, with a large randomised controlled trial finding it is no better than placebo.

While smaller studies have shown an inverse relationship between risk of cancer and sunlight exposure or vitamin D supplementation, the latest evidence suggests this is unlikely to be the case.

Some 2300 healthy middle-aged women were randomised to receive vitamin D3 (2000 IU/day) plus calcium (1500mg/day) or matching placebos.

At baseline, the mean serum 25-hydroxyvitamin D level among all