Onions are rich in organosulfur compounds that have shown remarkable results against many cancers like the colorectal, esophageal, prostate and stomach cancer. These compounds inhibit the tumor growth and mutagenesis and prevent the formation of free radicals. A daily serving of this vegetable has been recommended to decrease the overall risk for these cancers.
The sulphur compounds in onions reduce the blood clotting capacity and prevent unwanted clumping of the blood platelets. These compounds also decrease the bad cholesterol levels and improve the function of the red blood cells. Moreover, onions are rich in flavonoids which provide many heart benefits.
Onions have many health benefits that prevent the inflammatory diseases like allergies and rheumatoid arthritis. The unique sulfur compound, Onionin A, that is present in the onion bulb, inhibits macrophages, which trigger most of the inflammatory responses in the body. This can control chronic inflammation on a large scale. Moreover, quercetin, an antioxidant in onion, also prevents the oxidation of fatty acids in the body, resulting in decreased inflammation.