There is a powerful link between dairy foods and breast cancer. Foods such as milk, cheese, and butter have been found to increase IGF-1 (insulin growth factor) which is a protein that stimulates the development and spread of both prostate cancer and breast cancer cells. So far, studies have found that IGF-1 effects postmenopausal breast cancer patients more than younger women. More studies are being done to evaluate the risk for those who are premenopausal.
Until we know more, those with breast cancer and those who are at risk for developing it, may want to avoid dairy foods. Opting instead for milk alternatives such almond milk or coconut milk and extra virgin olive oil for sautéing or as a topping for popcorn and nut butters (hazelnut, cashew, or pistachio) as an alternative spread for toast.