Onion is known to Human civilization dating back to 5000 BC. It was only in 1492, Christopher Columbus introduced onion to the North America.

In India it's known from Ancient time. Charaka recognised it's medicinal properties. The anti bacterial property of onion was known to Ayurveda. Conditions like asthma and respiratory tract infection can be reduced with the help of onions. The anti-inflammatory agents present in onion helps reduce the cell-inflammation. Modern day research has shown onion also has a compound that prevents osteoporosis.In Indian Cuisine, it's widely used except Jain Food and strict Swatik food.
Different recipe and cook book call for different Onions. Here we tried to show you some commonly used Onions with images to clear up the confusion.
First is the Yellow Onion, this is commonly available in the market, have good amount of antioxidants. Bellow: Images of Yellow Onion


Next one is Shallots, this are small red onions, used in Indian specifically making Sambar, a lentil soup widely used in Southern Part of India. Shallots are very rich in antioxidants and have most of the phenols. Bellow: Images of Shallots



White Onions or sweet onions contain less phenol and their storage life is less. Bellow: Images of White Onion



Scallions are variety of shallots used in green state. They also contain good amount of phenols. Bellow: Images of Scallion

 

Tip: To avoid sting in your eyes while chopping onions, chill it for some time in the refrigerator before you actually chop it.