Red onion is best source of quercetin among other types of plant based food. Sulphorous food like red onion is best to be mixed with any types of food protein because sulfur can enhance the amino function especially that affecting nerve and brain. Red onion contains high amount of sulphur and it has positive effect to the body organ especially for the liver. Other compounds that can be found in red onion is sulphur. This flavonoids is important as antioxidant within the body together with quercetin.

Red onion is onion types with highest contains of pigment or known as flavonoid.

This is the substance that causing people cry or running tears when they cutting or crushing it. Red onions just like other types of onion contain an enzyme called alliinase, which is released when the red onion being cut ir crushed. Red onion also contains dietary fiber with 1.4gr for every 100 gr. Most calories comes from complex carbohydrates. In One hundred grams serving of red onions of serving contains 44 calories. In addition, they contain a good amount of folic acid and vitamin B1 and K. Red onion contains vitamin C, B6, biotin, chromium, calcium and dietary fiber. Red onion can also be grilled, fry or saute during cooking process. Red onion is type of onion that can be eaten raw and they also used to add some color to the dishes. The flavor of red onion is mild and sweet while the texture is crisp.

Red onions are usually have medium to large size. Red onion is An onion variety which has purple red skin and white rings of flesh. There are lots of varieties of onion and one of them is red onion. Onion which in scientific field called as Allium cepa is plant from family Liliaceae. The word onion derived from the word Onion since onion has many layers which comes together in one bulb. Since 6BC onion has popular as condiment in most types of food in India and later spread to Europe and other parts of the world.

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