The Blackberry is an aggregate fruit, containing many small dark purple colored drupes with soft fragile skin. There is a greenish white core in the middle of the cluster. Immature red and hard blackberries convert into mature black and shiny juicy fruit. Blackberries can be consumed fresh, frozen or canned. Blackberries are notable for their high nutritional contents of dietary fiber, vitamin C, vitamin K, and the essential mineral manganese. Blackberries have both soluble and insoluble fiber. One cup of blackberries (144 g) has an average of 7.6 g of fibre and contains half the daily recommended dose of vitamin C. Dietary fiber is important in maintaining a healthy digestive system, as it supports regular bowel movements.