Sambucol with natural elderberry is trusted by millions of people with positive results being reported worldwide.Developed by a world renowned virologist, Sambucol is the unique black elderberry extract that has been used in published clinical studies.No other elderberry brand can make the same claim.By using a proprietary method of extraction, only Sambucol can guarantee consistent, immune supporting properties in every dose. Take Sambucol every day for continuous immune system support.