What is Vitamin B17? Vitamin B17, also known as amygdalin, is a substance found naturally in over 1200 different foods including the seeds of many fruits (such as apricots, plums, cherries, oranges, nectarines, apples and peaches) and many kinds of raw nuts. Our natural Vitamin B17 supplement is extracted from apricot seeds. Vitamin B-17 was the name given to the purified form of this molecule by biochemist Ernst T Krebs in 1952. The synthetic form of Vitamin B17 is called "laetrile" and while it is chemically similar to Vitamin B17, they are two different compounds. Why is Vitamin B17 Important? A balanced diet is essential to a healthy life, and few of us consume enough vitamins and minerals from the foods we eat. Vitamin B17 contains powerful immunity-boosting properties to strengthen your body's natural defenses.