 The active product, which will be given as two divided doses, is 25 g soy protein containing 85 mg aglycone weight naturally-occurring isoflavones 150 mg total isoflavone, genistein 45 mg aglycone weight 80 mg total weight, daidzein 35 mg aglycone weight 60 mg total weight and glycitein 5 mg aglycone weight 10 mg total weight. Blood collection, cognitive tests, and mammograms will be used to assess participants at study entry, at each monthly visit, and at study completion. 