Dietary Supplement Yields 262 mg of Boswellic Acids 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 B-boswellic acid. This boswellia extract is carefully standardized to contain at least 70% boswellic acids.