Onions are known to be rich in biotin. Most of the flavonoids which are known as anti-oxidants are concentrated more in the outer layers, so when you peel off the layers, you should remove as little as possible.

Onion can fill your kitchen with a thick spicy aroma. It is a common base vegetable in most Indian dishes, thanks to the wonderful flavor that it adds to any dish.

Those who have sleeping disorders or insomnia can have a good night sleep if they have an onion every day.