Scientists have found that an enriched extract of Indian Frankincense can reduce the symptoms of osteoarthritis, the most common form of arthritis. The results of the study are published in the journal Arthritis Research & Therapy (open access). Scientists at the University of California-Davis did a trial with 70 patients and found that those treated with the frankincense extract (from the herb Boswellia) showed significant improvement in as little as 7 days.