Researchers have found that women who had more than four servings of fruit juice or sweetened fizzy drinks a week tended to have increased breast density, a major risk factor for breast cancer.
But women who didn't drink them at all generally had breast density around three per cent lower, according to the research, which was carried out at Laval University in Quebec, Canada.
Experts believe women with higher breast density are more at risk of breast cancer as there are more cells to develop the disease.
Dr Caroline Diorio, who led the study at Laval University, said: "An increase of about three per cent in breast density is not negligible in terms of breast cancer risk."
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