conventional medicine continues to dismiss laetrile therapy as quackery but my sister swears by it.   in her latest blogpost Cassava: The Local Laetrile she tells her stories of how even terminal cancer patients who can’t afford laetrile have been helped by the vitB17-rich kamoteng kahoy.   chewed raw in small quantities for the juice, or mashed and used as poultice, this lowly root relieves pain and even closes oozing ulcers.