Does a low-fat diet help prevent breast cancer?
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No. Studies show no evidence that reducing dietary fat decreases a woman's risk of developing postmenopausal breast cancer within the subsequent 14 years (strength of recommendation [SOR]: B, based on large heterogeneous prospective cohort studies and appropriate meta-analyses of these studies). Overall, evidence is insufficient to recommend for or against reduction in dietary fat to reduce risk of breast cancer for women, although recommendations for prudent fat intake may be justified on other grounds.
Clinical Inquiries, 2007 (MU)
Journal of Family Practice, 56(7) 2007: 583-584.