Lemon and orange peels are good for digestion and contain antioxidants. They both contain higher amounts of antioxidants than the fruit itself. Orange peels also have vitamin A, B vitamins, and calcium. Lemon peels contain minor amounts of magnesium, potassium, and calcium. Both orange and lemon peel contain a powerful antioxidant known as D-limonene which has demonstrated many benefits in research studies including lowering your risk of heart disease and having anti-inflammatory properties.