For centuries the dark berries of European black elder (Sambucus nigra L.) have been traditionally used as a winter remedy for immune support.*Nature's Way® Standardized Sambucus is the superior black elderberry extract.Premium ElderberriesMade with our unique, full-spectrum black elderberry extract that is from a unique blend of black elderberries that are naturally richer in Flavonoid BioActives®Superior QualityOur elderberry extract has been tested for bioavailability and shown to be active within the bodyProduct is made with a gentle, solvent-free extraction method that ensures maximum flavonoid potency