... vitamin C, but they also contain many other minerals and vitamins such as beta carotene, bioflavinoids, calcium, citrates, citric acid, iron ... malates, malic acid, niacin, phosphorus and vitamins A, B1, B2, E, K, and D. Studies have shown ... natural and abundant sources of vitamin C. They also contain vitamins A, D, and E, and antioxidant flavonoids. The rose hip ...