There is no question that the meager, late response of the medical community to the laetrile challenge was an important factor in its success. The FDA had no ally and was simply outgunned. To the degree that we did not learn this lesson of history, we will surely have the opportunity to relive it.
— Irving J. Lerner, The Whys of Cancer Quackery (1984), p. 819.
Laetrile, marketed as “Vitamin B17", is a compound derived from apricot pits that was falsely promoted as a "natural" cancer cure in the 1970s. It has no definitive anticancer effect in humans and can cause cyanide poisoning, especially when ingested with common raw foods like almonds, carrots, and celery. These foods contain beta-glucosidase, an enzyme that breaks laetrile down into cyanide. Despite these risks, the "cure" was embraced by desperate patients, championed by political extremists, and protected by anti-regulation activists. Laetrile remains one of the most notorious cases of modern medical quackery.
The laetrile cult is perhaps the most bizarre, ruthless, deceptive, misleading and dangerous health cult to come along in this century.
— Victor Herbert, Laetrile: The Cult of Cyanide (1979), p. 1124.
Magical cures lurk at the intersection between the denial and bargaining stages of grief. It’s why vulnerable people start taking laetrile, ivermectin, or whatever the next so-called secret cure is. Be wary when poison starts looking like hope.
A few references:
He, X.-Y., Wu, L.-J., Wang, W.-X., Xie, P.-J., Chen, Y.-H., & Wang, F. (2020). Amygdalin – A pharmacological and toxicological review. Journal of Ethnopharmacology, 254, 112717. DOI.
Herbert, V. (1979). Laetrile: The cult of cyanide. Promoting poison for profit. The American Journal of Clinical Nutrition, 32(5), 1121–1158. DOI.
Lerner, I. J. (1984). The whys of cancer quackery. Cancer, 53(3 Suppl), 815–819. URL.
Milazzo, S., Horneber, M., & Ernst, E. (2015). Laetrile treatment for cancer. Cochrane Database of Systematic Reviews, 2015(4), CD005476. DOI.










