Dietary Supplement Sambucus Nigra 450 mg Per Capsule Whole Berry and Flavor Lab Verified Discussion: Elderberry (Sambucus nigra) is a small shrub native to Europe. The fruit is a sweet, juicy, dark purple berry which has commonly been used in teas, wines and jellies. Elderberry has a history of use both topically and internally and is intended to provide nutritive support for general well-being during the cold season. Elderberry contains naturally-occurring antioxidants including flavonoids and phenolic compounds.