For centuries the dark berries of European black elder (Sambucus nigra L.) have been traditionally used as a winter remedy for immune support.* Premium Elderberries: Made from a unique cultivar of black elderberries with a higher level of naturally-occurring flavonoids. Full-spectrum black elderberry extract standardized to anthocyanins, which are potent flavonoid BioActives. Produced with gentle, solvent-free extraction method ensures maximum flavonoid potency. Superior Quality: Our elderberry extract has been tested for bioavailability and activity within the body.