Organic Orange

As in oranges, Tangerines are very low in calories. However they are high in flavonoid anti-oxidants like narigenin, hesperetin, vitamin A, carotenes, xanthins and luteins; in fact many times higher than in oranges.
In addition, these citrus fruits are very rich sources of vitamin-C (ascorbic acid), a water soluble vitamin. Vitamin-C is one of powerful natural anti-oxidant which has many essential roles like collagen synthesis and wound healing, anti-viral, anti-cancer activity and helps prevent from neuro-degenerative diseases, arthritis, and cold/fever...etc by removing oxidant free-radicals from the body. Vitamin C helps absorb iron in the food by reducing ferrous form of iron element to ferric form in the gut.
Further, they contain natural soluble and insoluble fiber like hemi-cellulose, pectin...etc which prevents cholesterol absorption in the gut. Adequate fiber in the food aids in smooth bowel movements by acting as laxative.
Citrus fruits, as such, have long been valued for their wholesome nutritious and antioxidant properties. It is scientifically established that citrus fruits, especially oranges, by virtue of their richness in vitamins and minerals, have many proven health benefits. Moreover, it is now beginning to be appreciated that the other biologically active, non-nutrient compounds found in citrus fruits such as phyto-chemical antioxidants, soluble and insoluble dietary fiber have been found to be helpful in reduction in the risk for cancers, many chronic diseases like arthritis, and from obesity and coronary heart diseases.