Product Description Bio-Certified Sambucus Black Elderberry 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.
