A compound and an enzyme that occur naturally in cruciferous vegetables such as broccoli, cauliflower, watercress, cabbage may actually prevent the relapse of certain cancers by killing cancer stem cells. Role of cancer stem cells Like stem cells, cancer stem cells can make copies of themselves. But instead of growing into tissues and organs, cancer stem … Continue reading Study: Watercress And Broccoli Kills The Cancer Stem Cells That Make Cancers Immortal