Blackberry
Parts Used & Where Grown
Blackberries grow in wet areas across the United States and Europe. Several species of blackberry exist: Rubus fructicosus is the most common European species and Rubus canadensis is a common North American species. While the leaves are used most frequently for medicinal preparations, the root is sometimes used as well.
How It Works
The presence of large amounts of tannins give blackberry leaves and roots an astringent effect that may be useful for treating diarrhea.1 These same constituents may also be helpful for soothing sore throats.