I find it interesting that protease enzymes which inhibit cancer spread and formation are present in all the foods also high in oxalic acid. Do a bit of research on foods high in protease enzymes. I totally agree this is a natural cancer therapy. Compare your findings to that of Colonel Joe at www.coljoe.com It's a win win discovery. The only difference......you don't have to buy an herbal supplement. You can make a quick trip to the grocery store.