From the Manufacturer''s Label:
Willow bark has been used for centuries by herbalists and health professionals worldwide. It is rich in a broad spectrum of phenolic glycosides, including the highly valued salicin. Planetary Herbals Willow Aid™ unites this concentrated willow extract with Chinese corydalis, boswellia extract, guggul and other renowned soothing botanicals.
Manufactured by Planetary Herbals.