Blackberries are notable for their significant contents of dietary fiber, vitamin C, and vitamin K. A 100-gram serving of raw blackberries supplies 43 calories and 5 grams of dietary fiber or 25% of the recommended Daily Value. In 100 gr vitamin C and vitamin K contents are 25% and 19% of DV, respectively, while other essential nutrients are low in content. 

Blackberries contain numerous large seeds that contain oil rich in omega-3 (alpha-linolenic acid) and -6 fats (linoleic acid) as well as protein, dietary fiber, carotenoids, and ellagitannins and ellagic acid.