Vitamin B17 (Amygdalin)

Vitamin B17 (Amygdalin)

Laetrile/ Amygdalin/ B17 

Laetrile, also known as Amygdalin or B17, is an aromatic cyanogenic glucoside found in the pits of many fruits, in raw nuts, and in other plants such as bitter almonds, peach, plums, apple well as apricot and cherry seeds. Plants like lima beans, clover and sorghum also contain amygdalin. Although it is frequently called

vitamin B17 but it is not recognized as vitamin.

Laetrile is a partly man-made (synthetic) form of the natural substance amygdalin. Laetrile was isolated from apricot pits by Ernest Krebs, MD. In the 1920’s.


According to research conducted by Ernest T. Krebs Jr. Amygdalin (B17) itself is nontoxic but it produces poisonous substance Hydrogen Cyanide (HCN) which is decomposed by enzymes Beta- Glucosidase which found in very large quantities only at the cancer cells but not found anywhere else in the body.

B17 is made up of 2 parts glucose, 1 part Hydrogen Cyanide and 1 part Benzaldehyde (analgesic/painkiller).

One particular enzyme called Rhodanese found everywhere in the body except at the cancer cells.

The Rhodanese breaks the Hydrogen Cyanide and Benzaldehyde down into 2 by-products, Thiocyanate and Benzoic acid which are beneficial in nourishing healthy cells and forms the metabolic pool production for vitamin B12.

When the B17 comes into contact with cancer cells, there is no Rhodanese to break it down and neutralise it but instead, only the enzyme Beta-Glucosidase is present in very large quantities.

When B17 and Beta-Glucosidase come into contact with each other, a chemical reaction occurs and the Hydrogen Cyanide and Benzaldehyde combine synergistically to produce a poison which destroys and kills the cancer cells. This whole process is known as selective toxicity. Only the cancer cells are specifically targeted and destroyed.

Amygdalin (B17) is available as:

  • an injection (intravenously)
  • tablets

Taking Amygdalin as tablets has more side effects than having it as an injection such as nausea, vomiting, headache and dizziness

Avoid eating other foods containing amygdalin if you take Amygdalin as tablets. This may include foods like:

  • raw almonds
  • carrots
  • celery
  • apricots
  • peaches
  • bean sprouts
  • beans – mung, lima, butter and other pulses
  • nuts
  • flax seed
  • high doses of vitamin C
  • crushed fruit stones or pips

These foods are safe to eat when you’re not taking Amygdalin because the levels of amygdalin in them are low.

Use with caution in patients who have liver problem.


  4. amygdalin.pdf

Laetrile; Naturopathic Oncology : An Encyclopedia Guide for patients and physicians, Dr.Neil Mckinney, BSc, ND; 3rd edition

Chatchai Sribundit, M.D.

Dr. Chatchai Sribundit is the distinguished founder of Akesis Life. His education, training and community support is highly regarded worldwide. Dr. Chatchai traveled extensively during the past two decades in order to bring the best possible integrative cancer treatments to Thailand. His primary concern is the well-being of his patients through kindness and care.

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