C,

Using Google's advanced search, I did a quick search for any url with cancer and prevention in it. Nothing showed up that was close to 'cancer-prevention.com' that you mention.
I would suggest checking out the cancer prevention information from sites of reputable comprehensive cancer centers, for example, MD Anderson's prevention page:
http://www.mdanderson.org/patients_public/prevention/
or from a national organization that is reputable, like the National Cancer Institute's prevention page:
http://www.cancer.gov/cancertopics/prevention-genetics-causes

While there are some herbs that may have possible cancer prevention properties, eg. green tea, turmeric, conclusive data from clinical trials is sketchy at best.

I'm sure you are aware that the highest risk factor for oral cancer is smoking and tobacco use. A prevention strategy would focus on cessation of use - easy to say, very difficult to do.

You can also check out that part of the OCF web site devoted to cancer research and the potential new treatments that are always so tantalizingly close but not yet available.

I hope that you'll be able to stop using tobacco, it will likely improve your odds more than various herbal strategies. Good luck, Sheldon