Vitamin B17 works to reduce tumors & prevent metastasis or the spread of the cancer. It kills cancer cells, strengthens the immune system. Vitamin B17 (nitriloside, amygdalin) exists in apricot, apple, cherry & nectarine seeds. Blackberry, cranberry, boysenberry, currant, strawberry & raspberry, have highest amounts in their wild form. Cassava (highest amount), sweet potato & yam. Leaves like Alfalfa, beet tops, spinach, watercress leaves, & sprouts from bamboo, alfalfa, fava, garbanzo.