Blackberry is low in calories and fat, rich in dietary fiber and a good source of Vitamins C, E, and K, folic acid, and the mineral manganese. Blackberry also contains macronutrients such as protein and omega-3 and omega-6 essential fatty acids.
The presence of anthocyanins, a polyphenol plant compound with antioxidant properties, gives Blackberry its deep purple color.
Other molecular complexes in Blackberry include ellagic acid (a phenol antioxidant which may help support skin health), gallic acid (antioxidant), tannins (an astringent polyphenol with astringent properties), ellagitannins (a class of tannin which is also a polyphenol), quercetin (antioxidant flavonol), and cyanidins (an antioxidant, radical scavenging type of anthocyanin).
Blackberries also contain phytoestrogens, naturally occurring plant estrogens which may contribute to hormone balance.