Citron is one of the original 4 citrus fruits. The white rind inside is what most people seek out for culinary uses due to its rich nutrient composition. Known around the world by many different names, Citron is used for a variety of medicinal applications as well, due to its high levels of Vitamin C – an important micronutrient with antioxidant properties that has also been shown to help relieve inflammation. Citron fruit is also high in other antioxidants.