One of my dad’s work colleagues had cancer and took the kernels that you find inside an apricot seed everyday for a few months, and his doctor was astonished that it had shrunken and disappeared.
I don’t know the exact details, but something about them containing cyanide apparently destroyed the cancer cells. You either believe it or not, but why would someone just lie about something like this? I don’t think you can completely dismiss these kinds of stories.