Sulforaphane is a phytonutrient, which is a fancy word for “nutrient found in a plant.” It functions as a powerful antioxidant, meaning it fights against and repairs the damage that occurs all the time in every cell in your body. It’s also an isothiocyanate — a type of compound that’s synthesized from a precursor found in cruciferous vegetables, which are a part of the Brassica family.