In a study in Spain, scientists analyzed five years of dietary intake for 1017 women with incident cases of breast cancer, and 1017 healthy women of similar age without a history of breast cancer, and categorized their diet as Mediterranean, Western, or Prudent (low fat). Researchers found that women who consumed a Mediterranean diet pattern had a significantly lower risk of breast cancer, an association that was especially strong for triple-negative tumors (a type of breast cancer that does not respond to hormonal therapy). On the other hand, the Western diet was associated with an increased risk of breast cancer, and the Prudent diet had no association to breast cancer risk.
British Journal of Cancer. 2014 Aug 7 [Epub ahead of print] (Castello et al.)