Abstract: The relationship between breast cancer and dietary phytoestrogen intake in northwestern Nigerian women was explored in a case control study involving 189 cases versus 189 matched controls. Cases had significantly earlier menarche than controls and when these were adjusted for, cases significantly consumed more dietary phytoestrogens than controls. Consumption of food items like Sorghum bicolor, Manihot esculenta and Typha domigensis appear to increase the risk of breast cancer while Oriza sativa, Mangifera indica and Musa sapientum appear protective.