Blackberry which is more commonly known as bramble by many people is a rich source of vitamin C and can be used as a tea in the treatment of colds and flu. Blackberry is botanically known as Rubus fruticosus L. and is a part of the family Rosaceae, and can be called bramble, dewberry, goutberry, and thimbleberry.

The leaves of the plant are used to treat throat irritations and a tea made from blackberry has been proven to help in treating mild infections of the mucous membranes of the mouth and throat. The use of blackberry in folk medicine was used to treat colds, flu, sore throat, as well as other conditions, such as gout, burns, and other illnesses.

The active properties in blackberry leaves are hydrolysable tannins, dimeric ellagitannins, citric and isocitric acids, flavonoids, pentacyclic and triterpene acids. The leaves can be used as a tea, gargle, mouthwash and poultices.

There are no known side effects with the use of blackberry as a natural herbal treatment and there are no known drug interactions.