Chemical alkali is harmful to the human body, it is very powerful corrosive, once it touches the human skin, it will penetrate into the deep tissue of the skin, if it touches the human eye, it will hurt the human cornea, and will continue to corrode downward, so that the deep tissue of the eye is damaged or even lead to blindness. The edible alkali has no effect on the body, adding edible alkali to react away the acid in the process of making pasta in order to produce delicious pasta, alkali can neutralize stomach acid, for patients with stomach ulcers to play a role in protecting the stomach. The disadvantage of edible alkali is that it has a strong destructive effect on vitamin B1, vitamin B2 and vitamin C in food, and can affect the absorption and utilization of certain minerals in the human body, so the use of edible alkali in life must be in moderation. Chemical alkali is harmful to the body, in contact with chemical alkali, must not be direct contact, good protection measures, pay attention to protect their personal safety. Remember not to use personal skin to touch the chemical alkali, otherwise the skin will be corroded, the right amount of edible alkali is not harmful to the human body.