Onions contain phytochemical compounds such as phenolics that are under basic research to determine their possible properties in humans.   Onion Onion varieties are used as food, dehydrated powder or medicinal purpose. The known varieties contain maximum water followed by sugar and proteins. They are low in fat, but have high energy value. The phytochemicals present in onions provide immunity to human body and play role in preventing cancer.   Grade:   Onions are available in three colour varieties - Yellow or brown onions or red onions.   Packing - 25.00 KGS, 50.00 KGS.