But, in the "vitamin C" chemical action, so that the original non-toxic - anhydride, also known as arsenic pentoxide, its chemical formula for As205), transformed into a toxic three-potassium arsenic (i.e., arsenous acid anhydride, also known as arsenic trioxide, its chemical formula for the As203), which is commonly known as arsenic! Arsenic has a plasma poisonous effect, can paralyze the capillaries, inhibit the activity of mercaptomethane, and make the liver lipohepatic lobular center necrosis, heart, liver, kidney, intestinal congestion, epithelial cell necrosis, capillary dilatation. But if the amount is small, there is no big impact, so do not eat too much at once will be fine, there is arsenic although it is highly toxic, but the same can be used in medicine, just the general dosage is very small.