Dietary Supplement. Bio-certified. Natural formula. Elderberry, echinacea, zinc propolis & vitamin C. Great taste. Virologist tested. Year-round defense. Virologist tested extract standardized bioactives proven bioavailability. Bio-Certified Elderberry Extract: The high potency of BioActives constituents in Nature's Way Sambucus standardized black elderberry extract are proven to be bioavailable and active within the body for optimal effectiveness. For centuries the dark berries of European black elder (Sambucus nigra L.) have been traditionally used as a winter remedy. In recent years, medical researchers have proven its efficacy in clinical trials. Delicious tasting syrup for year-round defense. No artificial preservatives. Gluten-free. Kosher certified. For children use Nature's Way Sambucus for Kids syrup. Superior Extract: From premium cultivar elderberries with higher naturally-occurring levels of BioActives constituents. Full spectrum, solvent-free extraction process for maximum potency.