A study published in the prestigious Journal of the American Medical Association (JAMA. 1998;280:1585-1589. Bensousan et al.) compared Chinsese herbs with placebo in the treatment of IBS. The results were that patients taking Chinese herbs had significant improvement in symptoms, and that treatment with Chinese herbs "significantly reduced the degree of interference with life caused by IBS symptoms." Another interesting outcome was that upon retesting 14 weeks after completion of treatment, the Chinese herbs group still maintained the improvement. This confirms that if the root of the illness is treated, the results are long lasting.