Cyanide poisoning near us, but plants and humans are Substance reduce the toxicity of it. Such as Cassava contains enzymes linamarinase, which it can be decomposed substance linamari into hydrogen-cyanide (The toxins in Vitamin B17). In the human body can get rid of this toxin by the enzyme rodanese (or Beta-cyanoalanine synthase). It will change the hydrogen-cyanide into thiocyanate, which is less toxic and excretion in urine.
This toxin in vitamin B17 can reduce by heating
There is also a way to reduce the toxicity of it in plants in several ways such as heating, cooking, etc. The level of cyanide (The toxins in Vitamin B17) that is toxic to humans (lethal dose) is 0.5 to 3.5 milligrams per kilogram. To determine the amount of this toxin by Acid hydrolysis in plants and animals, found that the amount of these toxins in cassava has a very high level in all parts of plants (240-1,040 ppm)
So if we want to remove parts or products of cassava, vegetables and fruits containing cyanide (The toxins in Vitamin B17) was used. You need to detect the amount of it and to reduce the toxicity of this toxin to a safe level before.