Our sulforaphane supplement contains 150mg sulforaphane + 300mg glucoraphanin from Broccoli Seed Extract. Sulforaphane in cruciferous vegetables occurs in a stored, inactive form as glucoraphanin. Glucoraphanin (Precursor of Sulforaphane) is converted to sulforaphane’s active form by the enzyme myrosinase. The powerful combination dramatically enhances the potency and makes a long-lasting effect.