I read something (on the internet, of course, so don't take it to heart) that pomegranate's and pomegranate juice can help to prevent prostate/breast cancer or something like that.

And there is this Brandt diet where you fast for 12 hours and just drinking water, and then you eat grapes (slowly) for another 12 hours, and it goes on like this for 6 weeks. And what the water does is it starves the cancer cells of nutrients, and when you eat the grapes there are certain nutrients in it so it kills the cancer. Probably not true. But myths are pretty cool.