Why does cutting onions smoke your eyes?

Because onion is composed of skin (brown part), scale (juicy part in the middle) and root disc (hairy part near the root), when the bud or root disc of onion is cut off, an enzyme will be released, which will stimulate the release of a gas inside onion. When the released gas comes into contact with moisture, an acid will be formed. So if the gas just touches the water in the eye, then the eye is equivalent to acid. This is why people cry when they cut onions.

Introduction:

Onion (scientific name: onion), alias garlic, garlic, jade onion, onion, Dutch onion, leather tooth and so on. It is a biennial herb of Liliaceae and Allium. Onion contains prostaglandin A, which can reduce peripheral vascular resistance and blood viscosity, and can be used for lowering blood pressure, refreshing, relieving stress and preventing colds. In addition, onion can also scavenge oxygen free radicals in the body, enhance metabolism, resist aging and prevent osteoporosis. It is a health food suitable for middle-aged and elderly people.

Onions are widely distributed in China, and cultivated in both north and south. It is one of the main vegetables in China. Onion producing areas in China mainly include Fujian, Shandong, Gansu, Inner Mongolia and Xinjiang.