Blackberry, like all other berries, contains ellagic acid. Its leaf, root and fruit are used in human consumption. Blackberry is rich in iron, calcium, magnesium, and vitamins C and A. Vitamin C helps produce collagen, which is important for structural materials in bones, teeth, skin, ligaments, tendrils and cartilage.
It also helps the body absorb iron, strengthens the immune system and contributes to faster recovery from colds and flu. Blackberry juice and wine are used for the treatment of anemia, and to improve immunity. It is also recommended to control blood pressure and improve circulation.