Elderberry (Sambucus nigra) is the dark purple berry from the European elder tree. It has a long history of use for cold and flu.

Elderberry is a popular ingredient in supplements. It might affect the immune system, and also seems to have activity against viruses, including the flu.
Elderberry (Sambucus nigra) is the dark purple berry from the European elder tree. It has a long history of use for cold and flu. Elderberry is a popular ingredient in supplements. It might affect the immune system, and also seems to have activity against viruses, including the flu.