Often referred to as the "herbal aspirin", White Willow Bark is a deciduous shrub native to Britain and Southern Europe whose therapeutic use dates back thousands of years. It is mentioned in ancient Greek and European medical journals, and was initially used by Native American tribes as a traditional herb. The body converts the salicin in white willow bark into salicylic acid, an agent that can Enhance reduce our level of Discomfort causing compounds known as prostaglandins.