Vitamin B17: Myths and Facts
- Dr. Karuturi Subrahmanyam
- 1 day ago
- 2 min read
Updated: 12 hours ago

The term “Vitamin B17” is often associated with amygdalin, a compound found in the seeds of certain fruits like apricots, bitter almonds, apples, peaches, and plums. A synthetic form of amygdalin, known as laetrile, was promoted in the 1950s as an alternative cancer treatment under the name “Vitamin B17.” However, amygdalin is not a vitamin, as it does not meet the criteria of being an essential nutrient required by the human body.
The Myth of Vitamin B17
The designation “Vitamin B17” was coined by Ernst T. Krebs Jr., who claimed that cancer was caused by a deficiency of this “vitamin.” This assertion lacks scientific backing, as amygdalin does not fulfill the criteria to be classified as a vitamin. Vitamins are essential nutrients that the body cannot synthesize in sufficient quantities and must obtain from the diet. Amygdalin does not meet these standards.
Claims of Cancer Treatment
Proponents have suggested that laetrile can selectively target and destroy cancer cells while leaving healthy cells unharmed. However, scientific studies have not substantiated these claims. Clinical trials and reviews have found no reliable evidence that laetrile is effective in treating cancer. Moreover, when ingested, amygdalin can be metabolized into cyanide, a potent toxin that can lead to serious health risks, including cyanide poisoning. Symptoms of cyanide poisoning include nausea, headaches, dizziness, liver damage, and in severe cases, death.
Regulatory Stance and Safety Concerns
Due to safety concerns and lack of evidence supporting its efficacy, the U.S. Food and Drug Administration (FDA) banned laetrile in 1987. Despite this, some alternative medicine proponents continue to market amygdalin or laetrile as “Vitamin B17,” often selling it online as a dietary supplement. Consuming products containing amygdalin can pose significant health risks due to potential cyanide poisoning.
Summary
“Vitamin B17” is not a recognized vitamin, and its promotion as a cancer cure is not supported by scientific evidence. The use of amygdalin or laetrile can be dangerous due to the risk of cyanide poisoning. Patients are advised to consult doctor before considering any alternative treatments and to rely on evidence-based medical therapies for cancer and other health conditions.
Dr. Karuturi Subrahmanyam, MD, FRCP (London), FACP (USA)
Internal Medicine Specialist
Kify Hospital
Danavaipeta
Rajahmundry
Phone : 85000 23456
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