Boiling broccoli prevents the formation of any significant levels of sulforaphane due to inactivation of the enzyme. However, the addition of powdered mustard seeds to cooked broccoli significantly increases sulforaphane formation.14 Then it’s almost as good as eating it raw! So, if you don’t have forty minutes to spare between chopping and cooking, or if you’re using frozen greens, just sprinkle the crucifers with some mustard powder before you eat them, and you’ll be all set.
