I catch the flu once to three times every year. A wise man once told me to look around at the weeds growing near wherever I lived for clues to what was needed to maintain health living in that area. This advice finally penetrated when I moved to southern France last year and saw the area was full of wild elderberry bushes. I immediately ordered this product and have been taking one capsule everyday for the past year and have not had the flu nor a cold all year. It's a miracle!