University of Illinois researchers did some tests on rats, and found that combining the 2 vegetables helped to prevent prostate cancer:

After 22 weeks, the researchers found that the combined tomato/broccoli diet was the most effective at prostate tumor reduction. Of the other treatments, castration was the only one that came close to being as effective.

The third treatment was the drug finasteride and it’s effectiveness was last of the three.  Of course, if you were to go to a traditional doctor, the first thing they would do is prescribe the pharmaceutical.  There are many products full of natural ingredients that are potentially more helpful in curing disease than the chemicals they prescribe.