Cyanide is found in a wide range of vitamins and foods in a form known as cyanocobalamin, which because it is bound to cobalamin (vitamin b12), significantly reduces the potential for the cyanide to do harm. Cyanocobalamin is actually found in 99% of the vitamins on the market, as it is relatively cheap (recovered from activated sewage sludge or produced through total chemical synthesis), and stable (non-perishable).