Vitamin B-17 can be found in apricot kernels and can be extracted for medicinal use, states the American Cancer Society. Vitamin B-17 is found in supplemental form as crushed apricot kernels and possibly in synthetic form in medical clinics, although this form is difficult to obtain in the United States.
Apricot kernels contain a sought-after substance called amygdalin, which some believe acts as an alternative cancer treatment, says the American Cancer Society. However scientific evidence does not support this claim for the synthetic form of the vitamin. Additionally, it is not approved by the Federal Drug Administration, and there may be side effects associated with the use of it, including cyanide poisoning, according to WebMD