1, because taro skin contains very alkaline mucus, which is called oxalic acid base and has a strong stimulating effect on the skin.
2. Saponin in taro skin makes hands itch. The preventive method is to wash your hands with vinegar before cutting taro. The acidity of vinegar can neutralize this alkali. If you already feel itchy, you can wash it with warm water or bake it on the fire for a while, and the itchy feeling will disappear. You can also wipe your hands with peels such as lemons and oranges.
3, and a very small amount of saponin will enter the blood, which has the function of hemolysis, and will cause the decomposition of red blood cells, so that blood cells will disintegrate and lose their cohesiveness. But saponin will not cause food poisoning, because it can be destroyed by gastric juice, and heating will be destroyed.
In fact, you can wash your hands with detergent, vinegar or pickling.
1, if your hands itch, you can wash them carefully, then cover them with vinegar, even under your nails. After a while, the itching will gradually disappear! (Cause: Acid-base neutralization) You can also put it on the fire, flip your palms repeatedly, and your hands will get hot. This can decompose the saponin that has penetrated into your hands.
2, you can pour a small amount of vinegar in the washbasin, soak your hands for 5 minutes, and then bake the soaked hands with fire, which can destroy the greasy keratin on the yam skin that causes itchy fingers. Or cut the yam into sections, soak it in boiling water for 30 minutes and then take it out, so that the mucus on the yam epidermis can be removed before peeling, which is easy to peel and not easy to itch.
3. Mucus contains plant alkaloids, which will itch when touching the skin. The saponin in the yam skin makes your hands itch.