Sulforaphane is an isothiocyanate that is naturally present in cruciferous vegetables (i.e. cauliflower, bok choy, cabbage, broccoli).
In vitro research shows a multifaceted anti-tumor effect of sulphorophane on cancer cells, and epidemiologic studies have long suggested that cruciferous vegetable intake may lower overall cancer risk.
Sulphorophane has even been shown to stimulate the body’s production of detoxification enzymes that eliminate xenoestrogens.
Xenoestrogens are compounds such as Bisphenol A (BPA is found in many hard plastic products such as toys, bottles and food containers) that imitate estrogens and have been implicated in a variety of diseases and are considered an environmental hazard.
Sulphoraphane is also a powerful antioxidant that protects against carcinogens (Proclamations of the National Academy of Sciences. 1997 Sep 16;94(19):10367-72).
Cancer Lett. 2008 October 8; 269(2): 291–304. Multi-targeted prevention of cancer by sulforaphane http://www.ncbi.nlm.nih.gov.ezproxy.ccnm.edu/pmc/articles/PMC2579766/?tool=pubmed