The standardized extract of the gum oleoresin of boswellia is recommended by many doctors. For rheumatoid arthritis or osteoarthritis, 150 mg of boswellic acids are taken three times per day.⁹ As an example, if an extract contains 37.5% boswellic acids, 400 mg of the extract would be taken three times daily. Treatment with boswellia generally lasts eight to twelve weeks. In the one clinical trial to date, people with ulcerative colitis used 550 mg of boswellia extract three times per day.