Sambucus elderberry. Great taste. About Black Elderberry: For centuries the dark berries of European block elder (Sambucus nigra L) have been traditionally used as a winter remedy for immune support. Standardized Extract: Made with our unique, full-spectrum black elderberry extract that is from a unique blend of black elderberries that are naturally richer in Flavonoid BioActives. Gentle, solvent-free extraction ensures maximum flavonoid potency.