Do you recommend that triple-negative breast cancer patients take flaxseed and vitamin D?

At this year's ASCO symposium, Dr. Pamela Goodwin of Toronto, Canada presented an interesting study regarding vitamin D levels. In this study, women with newly diagnosed breast cancer had vitamin D levels drawn, and then these patients were followed for many years. In this study, patients who had low levels of vitamin D at the time of diagnosis were at greater risk for later recurrence of their breast cancer than patients who had normal levels of vitamin D. The difference was quite impressive. While this certainly in no way proves that vitamin D prevents recurrence of breast cancer, as that question would require a prospective study to answer, taking vitamin D at the level of say 1000 units per day is cheap and safe and appropriate from a bone health standpoint. So it is difficult for me to imagine why we couldn't recommend this to women who have been diagnosed with early stage breast cancer.