Additionally, various botanical therapies have been shown to be effective to different degrees for relief of symptoms and for improved quality of life in non-ulcer and functional dyspepsia (a condition similar to IBS). These include the following therapies tested in trials which received a rating above three in the Jadad score (a validated instrument scoring from 0-5 for assessment of clinical trial quality): celandine extract, turmeric, peppermint and caraway oils, Iberogast (peppermint leaves, caraway fruit, with or without bitter candy tuft fruit, licorice root, lemon balm leaves, angelica root, celandine herbs, milk thistle fruit and chamomile flowers), peppermint & caraway & wormwood & fennel, peppermint oil and ginger extract, artichoke leaf extract and many others with lower Jadad score ratings.