Noni (Morinda citrifolia) is a traditional folk medicinal plant that has been used for over 2,000 years in Polynesia. Traditionally, Polynesians had many medicinal uses for noni including for fevers, headaches, malaria, bone fractures, dislocations, gastrointestinal disorders, urinary ailments, worms, wounds, rheumatism, and hypertension (high blood pressure). All parts of the noni plant were utilized.
Although noni is a popular supplement, few clinical trials have been conducted on its uses. There is preliminary research supporting noni's popular use as an antioxidant, but more research is needed in this area to establish noni's effects.
Based on scientific analysis and review of Tahitian Noni® juice, the European Commission Health and Consumer Protection Directorate-General Scientific Committee on Food found that "although some nutritional benefits are claimed for Morinda citrifolia L. products, the data supplied and the information available to the Committee provided no evidence for special nutritional benefits of Tahitian Noni® juice which go beyond those of other fruit juices."
Al, alizarin, alkaloids, americanin A, amino acids, anthraquinone, anthraquinone glycoside, asperuloside, asperulosidic acid, atchy (Hindi), ß-sitosterol, borreriagenin, cada pilva (Malay), caproic acid, caprylic acid, carotene, citrifolinin B epimer a, citrifolinin B epimer b, citrifolinoside, cytidine, deacetylasperuloside, dehydromethoxygaertneroside, d-glucose, dilo'k (Pijin), d-mannitol, epi-dihydrocornin, flavone glycosides, Indian mulberry, iridoid glycoside, kura (Fijian), kuti, ladda (Chamorro), L-asperuloside, linoleic acid, maddichettoo (Telugu), manja-pavattay, methyl alpha-d-fructofuranoside, methyl beta-d-fructofuranoside, molagha, Morinda citrifolia, morindacin, morindone, murier d'Inde, najalanun, nakura, narcissoside, nen (Chamorro), nicotifloroside, nolom, nono (Cook Islands Maori), nonu (Tongan, Wallisian, Futunian, Niuean, Tokelauan, Tuvaluan), nonu togi (Samoan), noona (Tamil), nordamnacanthal, nowoi (Bislama), octanoic acid, potassium, riro (Tok Pisin), proxeronine, Rubiaceae (family), rubiadin, rutin, scopoletin, te non (Gilbertese), terpenoids, TNJ, ursolic acid, vitamin A, vitamin C, yelotri.
These uses have been tested in humans or animals. Safety and effectiveness have not always been proven. Some of these conditions are potentially serious, and should be evaluated by a qualified healthcare provider.
Laboratory studies indicated that Tahitian Noni® juice (TNJ) may have greater antioxidant activity than some commonly used antioxidants. Although human study suggests that TNJ does have antioxidant effects, whether TNJ protects smokers from oxidative damage is yet to be proven. More high quality studies are needed in this area.
Noni juice has been used for many years for a wide variety of indications in Southeast Asia, and noni juice may improve hearing in people with auditory dysfunction. Although results are promising, additional research is warranted in this area.