Interesting article on vitamins:
"WOMEN who take a daily multivitamin pill are nearly 20 per cent more likely to develop breast cancer, a major study has revealed.
They said the result was concerning and needed investigation as many women used multi-vitamins in the belief they prevented chronic diseases such as cancer.
A "biologically plausible" explanation was that taking vitamin and mineral supplements significantly increased the density of breast tissue, a strong risk factor for breast cancer. Folic acid, often present in a potent form in multi-vitamins, may also accelerate tumour growth.