Frontier Co-op, Organic Cut & Sifted White Willow Bark, 16 oz (454 g)

Responsible to People and Planet Certified Organic by QAI Herbal Supplement Salix SPP. Non-Irradiated USDA Organic Kosher Several species of willow are used to produce willow bark herb, Salix alba, S. fragilis, S. daphnoides and S. purpurea. All contain adequate levels of the important constituent, salicin, to allow their use as the herb. Salicin was isolated and synthesised into acetylsalicylic acid in the 1850s and eventually marketed as aspirin in the late 1890s by Frederich Bayer & Co.