A very small amount of saponin will enter the blood and have hemolytic effect, which will cause the decomposition of red blood cells, leading to the disintegration of blood cells and the loss of coagulation ability. But saponin does not cause

food poisoning

Because it can be destroyed by gastric juice, it will be destroyed by heat. So the next time taro itches, put your hands on an open flame, stove or heater to bake.