Importance of Onion

Tears and bad breath-these are the two things usually associated with onion . But there is much more to these popular vegetables, which is known not only for it's unique flavours but also for their therapeutic benefits. Onion and garlic are guaranteed to transform any meal into a profoundly aromatic culinary experience.

Onion is a vegetable cultivated in almost all the countries of the world and consumed across the globe in a country like Nigeria, you hardly cook any type of soup without using onions. Except for a few communities, onion is used for cooking purposes by almost all the people. Not only does the vegetable lend an excellent taste to dishes, but is also associated with imparting a number of health benefits to its users. In fact, onions are said to have therapeutic, antibacterial, antifungal and loads of other beneficial properties.

Onions contain more than one hundred sulfur-containing compounds. These sulfur compounds are what cause the eyes to tear up when cutting onions. One particular sulfur compound has been found to prevent the biochemical chain of events that lead to asthma and respiratory ailments.

Higher intakes of fruits and vegetables have been associated with a variety of health benefits. Research shows that onions may help guard against many chronic diseases. That's probably because onions contain generous amounts of a flavonoid called quercetin. Other sources are tea and apples, but research shows that absorption of quercetin from onions is twice that from tea and more than three times that from apples. Studies have shown that quercetin protects against cataracts, cardiovascular disease, and cancer.


The higher the intake of onion, the lower the level of glucose found during oral or intravenous glucose tolerance tests. Experimental and clinical evidence suggests that allyl propyl disulfide is responsible for this effect and lowers blood sugar levels by increasing the amount of free insulin available. Allyl propyl disulfide does this by competing with insulin, which is also a disulphide, to occupy the sites in the liver where insulin is inactivated. This results is an increase in the amount of insulin available to usher glucose into cells causing a lowering of blood sugar.


Culled from Here