In the 1950s, American doctors discovered that cancer is only a deficiency disease caused by the lack of an important building block in modern nutrition: Vitamin B17 (also known as amygdalin or laetrile) is found, for example, in the bitter seeds of apricots, cherries or plums and is practically no longer consumed in Western cultures today because of the prussic acid (cyanide) it contains. But the concern is unfounded: The toxic cyanide can only be released if a certain fission enzyme is present and this only occurs in the cancer cells, but nowhere else in the body! The toxic effect of prussic acid can therefore only be released in the diseased cell and thus destroy it from within without damaging surrounding tissue. Apricot kernels also have a preventive effect on a family predisposition to cancer.