Consumption of walnuts may help suppress growth and survival of breast cancer, a study claims. The study, published in the journal Nutrition Research, found that consumption of two ounces of walnuts a day for about two weeks significantly changed gene expression in confirmed breast cancers. In this first clinical trial, women with breast lumps large enough for research and pathology biopsies were recruited and randomised to walnut consuming or control groups. Immediately following biopsy collection, women in the walnut group began to consume two ounces of walnuts per day until follow-up surgery. Pathological studies confirmed that lumps were breast cancer in all women who remained in the trial. The study showed activation of pathways that promote apoptosis or programmed cell death and cell adhesion and inhibition of pathways that promote cell proliferation and migration.