Why are the research and testimonies of Vitamin B17 so hush-hush?

Vitamin B17 is not actually a vitamin. Vitamins are essential for human health. B17 is a poison also known as amygdalin as well as laetrile. Amygdalin is broken down into cyanide, which is an incredibly toxic substance. There is zero reason to use it to treat cancer. There is no scientific evidence is works. It’s one of the clearest cases of snake oil medicine. Laetrile is a cyanogenic glycoside, a conjugate of cyanide and a sugar. They are a common type of chemical many plants produce for chemical self-defense: to keep their seeds from getting chewed up (apples, cherries, apricots, raw lima beans, bitter almonds) or seedlings eaten (sorghum) or roots eaten (cassava, processed to remove most of the cyanide in order to make tapioca). It was first experimented by former Soviet Union scientist in the 50’s of the 20th century and abandoned. The interest re-emerged in USA after Erns T. Krebs patented a method to synthesize a simplified version of the compound and started promoting it as treatment for cancer, it was utilized in many patients off-code until the FDA banned it.