Supplements and Herbs

Vitamin B 17 against cancer (Laetrile/Amygdalin/Nitrilosides)

Noteworthy details on effectiveness, sources, dosages and some caveats

by Leonard, expanded by copyright © Healing Cancer Naturally

(Background article on Laetrile here)

“I've read ... about amygdalin/Laetrile [that] "cancers of the lung, breast, colon, ovaries, stomach, esophagus, prostate, and the lymphomas, are much helped" by Laetrile (Ernesto Contreras, Sr., M.D. cited in Diamond et al., 1997, pp. 126-127).

I do NOT think it's especially effective with myeloma. The above comments refer to IV laetrile, not oral amygdalin, which is much less powerful. Its effectiveness appears to be greatly enhanced by taking it with proteolytic enzymes[1] (particularly pancreatin) and vitamin A.

Vitamin B 17 is a powerful pain-reliever and also alleviates nausea and vomiting. Michael Schachter, M.D. and Douglas Brodie, M.D. have prescribed 500 mg taken 3 times a day or 3-5 apricot kernels 3 times a day (Diamond et al., 1997, pp. 78-79, 376). I heard it's best to take it with food, in several small dosages throughout the day (NOT one large dosage).

The richest sources are the pits/seeds/kernels of apricot, peach, cherry, and (probably to a lesser extent) apple, and plum/prune.

Since they are (slightly) toxic when taken orally, I'd eat about 5 kernels (no more than that a one time) 3 or 4 times a day, but no more if I had cancer. Laetrile is powerfully effective in healing cancer (and is nontoxic) only when taken IV.

Sun-dried kernels and bitter almonds contain significant amygdalin (sweet almonds do not). Foods highest in amygdalin are wild blackberry, choke cherry, wild crabapple, cranberry, apple seeds, apricot seeds, cherry seed, nectarine seed, peach seed, plum seed, prune seed, bitter almond, broad beans, cassava, and alfalfa.[2]

Addendum by Healing Cancer Naturally: Also compare the following testimonial from a former bladder cancer patient, now healed by a combination of “alternative” approaches, quote: “Two years ago I chewed upwards of 30 apricot kernels a day ... [but t]he months and months of heavy kernel use did nothing. This is not a condemnation of apricot kernels. [Not everything works for everyone all the time.]” Note that Healing Cancer Naturally has no details on the approaches this former bladder cancer patient used.


Do NOT exceed recommended dosage. "Apricot kernels...although they have been widely used, they are potentially toxic taken orally (Moss, 1992, p. 367). Avoid eating large amounts of (sweet) almonds while taking amygdalin. Do NOT take megadoses of vitamin C while taking Laetrile/amygdalin (unless directed by practitioner), and do NOT use Laetrile/amygdalin at times of fever. Slight temperature, itching, or irritation at tumor site indicate healing.

For more information:

  • (Hans A. Nieper, MD)
  • (you need to sign up as a member of cancercured to read this message

Griffin's book World Without Cancer is considered the "bible" on amygdalin.

In conclusion, I think it's helpful but I would not make it a priority.

Compare background article on Laetrile, Ernst Krebs lecturing on Vitamin B17, The Ultimate Cancer Conspiracy: Vitamin B17/Laetrile, Vitamin B17 quotes and the book World Without Cancer.

... and for the best, easiest, and least expensive ways knows to heal cancer

after studying the subject for some twenty years, click here.



1 Proteolytic enzymesare catalysts or accelerators of proteolysis, the breakdown of proteins into peptides and amino acids; such as during the digestion of food. Proteolytic enzymes have been used for cancer treatment in their own right, see e.g. Transitional Cell Carcinoma of the Bladder Healed.

2 Here is a listing of 40 foods containing vitamin B17 (Laetrile).

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