28. Broccoli Contains chemicals that block growth of human prostate cancer cells and aid in cancer prevention. Major compound, indole-3-carbinol ( 13C ) have cancer prevention properties. 13C converted to DIM, which acts as powerful male hormone blocker and stops prostate cancer cells from growing and dividing. Dihydrotestosterone ( DHT ) is the primary male hormone that causes prostate cancer. Journal of Biological Chemistry, University of California, June 6, 2003