The white willow, a tree native to Asia and Europe, received its name because of its fine white leaves. For generations, doctors from ancient civilizations and modern society alike have used white willow and its active ingredient, salicin, to combat pain and inflammation. When extracting salicin from the bark became too expensive, German researchers developed a synthetic salicyclic acid, the body’s natural byproduct in salicin breakdown. From this synthetic chemical, Bayer created aspirin, but the original source is still a competitive alternative for arthritis management.