I have heard many times that since it is a precursor to glutathione, it is an excellent supplement. Glutathione is said to be one of the best antioxidants....likely would help to prevent cancer. I take it because of this idea. I also have Sjogrens Syndrome and have problems with saliva...so this would be a nice bonus

I get mine from whole Foods.

Heard there are patches now (not available at WF)