This study, by Hoy et al, and published in the Journal of the American Dietetic Association, suggested a favorable effect of a low-fat diet on breast cancer recurrence, especially in postmenopausal women with hormone receptor negative disease. However, the study authors cautioned that because both reduced fat intake and modest weight loss were seen in the intervention group (those on the low-fat diet), the relative contribution of each to breast cancer clinical outcome cannot be determined.