“a Marshall University team revealed that consumption of two ounces of walnuts a day for about two weeks significantly changed gene expression in confirmed breast cancers.”
Read more here.
Paper: https://www.sciencedirect.com/science/article/pii/S0271531718311904?via%3Dihub
W. Elaine Hardman et al, Dietary walnut altered gene expressions related to tumor growth, survival, and metastasis in breast Cancer patients: A pilot clinical trial, Nutrition Research (2019). DOI: 10.1016/j.nutres.2019.03.004