. . . "Find Nutritious RecipesHow to Use ItBased upon preliminary studies it is estimated that the minimum amount required for the prevention of breast cancer is 300 to 400 mg daily.4Where to Find ItIndole-3-carbinol is found in highest concentrations in broccoli, but is also found in other cruciferous vegetables, such as cauliflower, cabbage, and kale.Possible DeficienciesAs indole-3-carbinol is not an" .