White Willow Bark Powder is derived from the White Willow Tree and grows up to 100 ft. tall in North America as well as Central & Southern Europe. Some cultures have used this bark extract as the original aspirin for headaches, pain relief, and to reduce fever. The active compounds (salicylate glycosides) help to reduce inflammation and naturally soothe the nervous system. This is the highest quality White Willow Bark Extract available on the market in raw, powder form. This ingredient may be added to foods and beverages or smoothies and green drinks. It is a tannish-brown powder and has no fillers, additives or preservatives.