Citron is a citrus fruit which has a rough exterior. The nutrient dense white rind of citron is widely used in dishes such as jams, marmalades and pickles while the zest is used to make refreshing cocktails and beverages. Citron is loaded with a rich array of nutrients that include high levels of Vitamin C, potent antioxidants, dietary fibre, calcium, iron, beta-carotene, niacin, manganese, zinc, selenium, vitamin B6 and potassium. Here are the 5 health benefits of citron.