The antioxidants in blackberries are said to prevent cancer.
Blackberries are deemed to be an astringent due to their tannin content. Hence, they help blood flow and are effective in the reduction of skin and mouth rashes.
Blackberries are meant to alleviate haemorrhoids.
They are also a great source of pectin, a soluble fibre. Too many blackberries, however, can lead to constipation.