SAMBUCOL® is world-renowned herbal remedy people have used for decades to help increase the body's resistance to colds, flu, and other illnesses. Sambucol's name is derived from one of its principal ingredients, black elderberry or Sambucus nigra L.. Black elderberry extract became been the subject of clinical studies after noted virologist Madeleine Mumcuoglu, Ph.D. developed a proprietary method for black elderberry extraction while working on her doctoral thesis. Sambucol contains a proprietary black elderberry extract in a gluten free base. For daily maintenance; Adults take 2 teaspoons daily, children 1 teaspoon daily. For intensive usage, adults can take 2 teaspoons four times daily and children 1 teaspoon four times daily.