American researchers have initially confirmed that broccoli and other cruciferous vegetables are rich in compounds called isocyanate (ITC), which can preferentially kill the mutant P53 gene and leave the P53 gene. The protein composed of the P53 gene has It helps prevent cancer cells from growing, but once the P53 gene is mutated, it loses this protection, and the mutated P53 gene is associated with almost half of human cancers. Why can broccoli prevent cancer? ['Broccoli rich in isocyanate (ITC) can kill cancer cells.', 'Broccoli prevents mutations in the normal P53 gene.', 'Broccoli contains substances that can destroy the mutant P53 gene and retain the normal P53 gene.', 'Broccoli contains proteins that help stop cancer cells from growing.']