The onion is the most widely cultivated species of the genus Allium. Its close relatives include the garlic, shallot, leek, chive, and Chinese onion.It is cultivated and used around the world. As a food item, they are usually served cooked, as a vegetable or part of a prepared savory dish, but can also be eaten raw or used to make pickles or chutneys. They are pungent when chopped and contain certain chemical substances which irritate the eyes.

Benefits of onion

1.Prevents Cancer

Onions contain a sulpur-containing compound that has been shown to decrease tumor development and slow the spread of ovarian and lung cancer. It also contain fisetin and quercetin, flavonoid antioxidants that may inhibit tumor growth.

2.Regulate Sleep

Folate, found in onions, might help reduce depression. Excess homocysteine also interferes with the production of the feel-good hormones serotonin, dopamine, and norepinephrine, which regulate not only mood, but also sleep and appetite.

3.Good for skin and hair

Onions are high in vitamin C, which is needed for the building and maintenance of collagen, which provides structure to skin and hair.

4.Prevents tooth decay 

Chewing raw onions improve our oral health .They help eliminate bacteria that can lead to tooth decay and gum issues

5.Prevents nose bleed

Keeping a small piece of onion under the nostrils and inhale stops or slow down a nose bleed.