Source Naturals' Boswellia Extract is concentrated from the specially processed resins and gums of the Boswellia serrata tree. The benefits of Boswellia are due to the presence of four triterpene acids, especially ß-boswellic acid. Source Naturals' Boswellia Extract delivers at least 65% boswellic acids -- 243 mg per serving. Gluten and soy free.