Past studies have suggested that a connection may exist between diet and breast cancer. A paper published in the prestigious journal, Science, proposes a possible explanation. It seems that a cholesterol metabolite (27-hydroxycholesterol), mimics the hormone estrogen. In 75% of the breast cancer cases, estrogen directly promotes tumour growth. Therefore, in order to reduce the risk of breast cancer, patients should maintain healthy cholesterol levels via a healthy diet or if needed, statin drugs.