For centuries the dark berries of European black elder (Sambucus nigra L.) have been traditionally used as a winter remedy. Nature's Way Bioavailable Sambucus is the full-spectrum black elderberry extract.- Standardized extract has been tested for bioavailability and activity within the body- From unique cultivar elderberries with higher naturally-occurring level of flavonoids- Full spectrum, solvent-free extraction method for maximum potency- No artificial preservatives- Gluten-free and Kosher certified- Contains no artificial coloring, artificial flavoring, artificial preservatives, dairy products, gluten, preservatives, salt, soy, wheat, or yeast