Morinda citrifolia (Noni): A literature review
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Wang MY et a l / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141 ·1127·
200 2, Act a Pharm acolog ica Si nica
ISS N 16 71-4 083
Shang hai Insti tute of Materia M edica
Chine se Academ y of Sci ences
ht tp:/ /www.Chi naPh ar.c om
Morinda citrifolia (Noni): A literature review and
recent advances in Noni research1
WANG Mian-Ying2, Brett J WEST 3, C Jarakae JENSEN3, Diane NOWICKI,
SU Chen3, Afa K PALU3, Gary ANDERSON
University of Illinois College of Medicine, Depar tment of Pathology, 1601 Parkview Avenue, Rockford, IL 61107, USA;
3
Depar tment of R & D, Morinda Inc, Provo, U tah 84606, USA
KEY WORDS Morinda citrifolia L; Noni; proxeronine; xeronine; cancer prevention; antioxidants; selective COX-2
inhibitor; Yin & Yang
ABSTRACT
Morinda citrifolia L (Noni) has been used in folk remedies by Polynesians for over 2000 years, and is reported
to have a broad range of therapeutic effects, including antibacterial, antiviral, antifungal, antitumor, antihelmin,
analgesic, hypotensive, anti-inflammatory, and immune enhancing effects. In order to reveal the nutritional and
medicinal value of the Noni plant, and to summarize scientific evidence that supports the Polynesians’ claim, a
literature review and recent advances in Noni research is given below.
INTRODUCTION cient literature. Tea supposedly originated in China, and
was discovered to be an antidote for poisonous herbs
Herbal and natural products of folk medicine have
by a great herbalist, Shen Nong, about 4700 years ago,
been used for centuries in every culture throughout the
when tasting unknown herbs to find plants with me-
world. Scientists and medical professionals have shown
dicinal value. He is generally known as the “God of
increased interest in this field as they recognize the true
Agriculture” in China for his great achievements as both
health benefits of these remedies. “L et food be your
a pioneer and a leader in farming. His findings were
medicine and let medicine be your food” was advised
compiled in a book in the Dong-Han dynasty (25-220
by the father of medicine, Hippocrates, over two mil-
AD) called “Shen Nong’s Herbs,” which is still a clas-
lennia ago. It’s still true today that “you are what you
sic herbal book today. While searching for food, the
eat.” Folk medicine in different cultures has a long
ancient found that some foods had specific properties
history of ancestors creating primitive medicines dur-
of relieving or eliminating certain diseases, and main-
ing their struggles against natural calamity and disease.
taining good health. It was the beginning of herbal medi-
Tea is one of the first Chinese herbs mentioned in an-
cine[1]. The same story occurred in Polynesia. Among
the medicinal plants discovered by the ancestors of
1
Noni research projects have been supported by a research grant Polynesians, Morinda citrifolia L (Noni) is one of the
from M orinda, Inc. Data in this review paper have partially been
traditional folk medicinal plants that has been used for
presented in national and international scientific meetings and
published in their proceedings. over 2000 years in Polynesia[2]. It has been reported to
2
Correspondence to WANG M ian-Ying, MD , MS. Phn 1-815- have a broad range of therapeutic and nutritional
395-5674. Fax 1-815-395-5793. E-mail mianwang@uic.edu value[3].
Received 2002-10-02 Accepted 2002-10-22·1128· Wang MY et al / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141
LITERATURE REVIEW AND RECENT ADVANCES scribed Morinda citrifolia L as an edible plant in a tech-
IN NONI RESEARCH nical manual of edible and poisonous plants of the Pa-
An edible and medicinal tropic plant — Morinda cific Islands, in which the leaves and fruits could be
citrifolia L (Noni) T he ancestors of Polynesians are used as emergency food[13]. Abbott also reported that
believed to have brought many plants with them, as Noni had been used as a food, drink, medicine, and
food and medicine, when they migrated from South- colorful dye[14]. The medicinal history and accumu-
east Asia 2000 years ago[4]. Of the 12 most common lated scientific studies, to date, have revealed and con-
medicinal plants they brought, Noni was the second firmed the Polynesian’s claim of the health benefits of
most popular plant used in herbal remedies to treat vari- Noni. The medical knowledge and pharmacopoeia of
ous common diseases and to maintain overall good health[5]. the Polynesians is now believed to have been fairly com-
Noni is the common name for Morinda citrifolia L and plex and modern scientific and medical communities
is also called Indian Mulberry, Ba Ji Tian, Nono or are beginning to study the plants compiled from this
Nonu, Cheese F ruit, and Nhau in various cultures knowledge base.
throughout the world. It has been reported to have a The Noni plant is a small evergreen tree found
broad range of health benefits for cancer, infection, growing in open coastal regions at sea level and in for-
arthritis, diabetes, asthma, hypertension, and pain[6]. The est areas up to about 1300 feet above sea level. The
Polynesians utilized the whole Noni plant in their me- plant is often found growing along lava flows. It’s iden-
dicinal remedies and dye for some of their traditional tifiable by its straight trunk, large, bright green and el-
clothes. The roots, stems, bark, leaves, flowers, and liptical leaves, white tubular flowers, and its distinctive,
fruits of the Noni plant are all involved in various com- ovoid, “grenade-like” yellow fruit. The fruit can grow
binations in almost 40 known and recorded herbal rem- in size up to 12 cm or more and has a lumpy surface
edies[7]. Additionally, the roots were used to produce a covered by polygonal-shaped sections. The seeds,
yellow or red dye for tapa cloths and fala (mats), while which are triangular shaped and reddish brown, have
the fruit was eaten for health and food. There are nu- an air sac attached at one end, which makes the seeds
merous Polynesian stories of heroes and heroines that buoyant. This could explain, in part, the wide distribu-
used Noni to survive from famine. There is one tale of tion of the plant throughout the Polynesian islands. The
Kamapua’a, the pig god, who loved Pele, the volcano mature Noni fruit has a foul taste and odor[15]. Morinda
goddess. He taunted Pele with a chant, “I have seen citrifolia L is not considered to be at risk in the wild.
the woman gathering Noni /scratching Noni/pounding Medicinal use of Noni plant The Polynesians
Noni.” Supposedly, the chant referred to Pele’s eyes utilized the whole Noni plant in various combinations
becoming red, and she became so angry that she plunged for herbal remedies. The fruit juice is in high demand
into battle with him. A Tongan myth tells of the god in alternative medicine for different kinds of illnesses
Maui being restored to life by having Noni leaves placed such as arthritis, diabetes, high blood pressure, muscle
on his body[8]. aches and pains, menstrual difficulties, headaches, heart
Morinda citrifolia fruit has a long history of use disease, AIDS, cancers, gastric ulcers, sprains, mental
as a food in tropical regions throughout the world. Writ- depression, senility, poor digestion, atherosclerosis,
ten documentation of the consumption of this fruit as a blood vessel problems, and drug addiction. Scientific
food source precedes the twentieth century. Captain evidence of the benefits of the Noni fruit Juice is lim-
James Cook of the British Navy noted in the late 1700’s ited but there is some anecdotal evidence for success-
that the fruit was eaten in Tahiti[9]. An 1866 publication ful treatment of colds and influenza[16]. Allen reported
in London explained that Morinda citrifolia fruit was some information on the ethnobotanical properties of
consumed as a food in the Fiji Islands[10]. Later publi- Noni. He said that the fruit is used as deobstruent and
cations describe the use of this fruit as a food through- emmenagogue. This is one of the earliest articles on
out the Pacific Islands, Southeast Asia, Australia, and the medicinal benefits of Noni[17]. Isabel Abbott, a
India. In Roratonga “the fruit was often eaten by the former botanical chemist at the University of Hawaii,
natives”[9]. Australian Aborigines were reported to be stated that, “People are crazy about this plant. T hey
“very fond” of the fruit[11 ]. In Samoa, Noni fruit was use it for diabetes, high blood pressure, cancer, and
common fare, and in Burma, the fruit was cooked in many other illnesses”[18]. Bushnell reported that Noni
curries or eaten raw with salt[12]. In 1943, Merrill de- was a traditional remedy used to treat broken bones,Wang MY et a l / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141 ·1129·
deep cuts, bruises, sores, and wounds[19]. Morton gave why TAHITIAN NONI JUICE (TNJ) can help in many
numerous references for medicinal uses of Noni[12]. In health problems in different ways. He has obtained sev-
addition, Polynesians are reported to have successfully eral patents for Xeronine. He states that the active in-
used Noni to treat breast cancer and eye problems. gredient in many of the pharmacologically active en-
Joseph Betz, a research chemist in the FDA’s Division zymes and in many of the effective folklore drugs is
of Natural Products, Center for Food Safety and Ap- xeronine. This alkaloid is a critical normal metabolic
plied Nutrition, stated that “Morinda citrifolia has been coregulator. The ailments that he believes to be helped
tested for a number of biological activities in animal and by Noni include high blood pressure, menstrual cramps,
anti-microbial studies.” He reports that the dried fruit arthritis, gastric ulcers, sprains, injuries, mental
has smooth muscle stimulatory activity and histaminer- depression, senility, poor digestion, drug addiction, and
gic effects[20 ]. pain. “I have devoted much of my life to the study of
Major components A number of major compo- this unique substance that I have named ‘Xeronine’. I
nents have been identified in the Noni plant such as am convinced of the tremendous benefits achieved by
scopoletin, octoanoic acid, potassium, vitamin C, furnishing the body with a proper supply of this mate-
terpenoids, alkaloids, anthraquinones (such as rial” [40].
nordamnacanthal, morindone, rubiadin, and rubiadin- Biological activities of Noni products
1-methyl ether, anthraquinone glycoside), β-sitosterol, Antibacterial activity Acubin, L-asperuloside, and
carotene, vitamin A, flavone glycosides, linoleic acid, alizarin in the Noni fruit, as well as some other an-
Alizarin, amino acids, acubin, L-asperuloside, caproic thraquinone compounds in Noni roots, are all proven
acid, caprylic acid, ursolic acid, rutin, and a putative antibacterial agents. These compounds have been shown
proxeronine[21-32]. to fight against infectious bacteria strains such as
A research group led by Chi-Tang Ho at Rutgers Pseudomonas aeruginosa, P roteus morgaii, Staphylo-
University in the US is searching for new novel com- coccus aureus, Baciillis subtilis, Escherichia coli,
pounds in the Noni plant. They have successfully iden- Salmonella, and Shigela. These antibacterial elements
tified several new flavonol glycosides, an iridoid glyco- within Noni are responsible for the treatment of skin
side from the Noni leaves, a trisacharide fatty acid ester, infections, colds, fevers, and other bacterial-caused
rutin, and an asperulosidic acid from the fruit. Two health problems[41]. Bushnell reported on the antibacte-
novel glycosides and a new unusual iridoid named rial properties of some plants found in Hawaii, includ-
citrifolinoside have been shown to have an inhibiting ing Noni. He further reported that Noni was tradition-
effect on AP-1 transactivation and cell transformation ally used to treat broken bones, deep cuts, bruises, sores
in the mouse epidermal JB6 cell line[33-38]. James Duke and wounds. Extracts from the ripe noni fruit exhib-
listed 23 different phytochemicals found in Noni as well ited moderate antibacterial properties against P s
as 5 vitamins and 3 minerals in an authoritative CRC aeruginosa, M pyrogenes and E coli, and were also
handbook[39]. shown to have moderate antibacterial properties against
Xeronine system Retired biochemist, Ralph Salmonella typhosa, Salmonella montevideo, Salmo-
Heinicke, states that the Noni fruit contains a natural nella schottmuelleri, Shigella paradys, BH and Shigella
precursor for Xeronine that he named Proxeronine. paradys, III-Z [19]. Leach demonstrated that acetone ex-
Proxeronine is converted to the alkaloid, Xeronine, in tracts obtained from Cycas circinalis, Morinda citrifolia,
the body by an enzyme he calls Proxeroninase[32]. His Bridelia penangiana, Tridax Procumbens, Hibiscus
hypothesis is that Xeronine is able to modify the mo- tiliaceus, and Hypericum papuanun showed antibacte-
lecular structure of proteins. T hus Xeronine has a rial activity. The widespread medicinal use of these
wide range of biological activities. When a protein such plants would suggest that they do contain pharmaco-
as an enzyme, receptor, or signal transducer is not in logically active substances and alternative methods of
the appropriate conformation, it will not work properly. extraction and screening should be utilized to find the
Xeronine will interact with the protein and make it fold major bioactive component in the plants for the pur-
into its proper conformation. The result is a properly pose of new drug development[42]. Locher reported that
functioning protein. Whenever a problem arises in the selected plants including Morinda citrifolia have a his-
cell due to a protein structural problem, Xeronine’s pres- tory of use in Polynesian traditional medicine for the
ence would be beneficial. His hypotheses may explain treatments of infectious disease[43]. T hese plants were·1130· Wang MY et al / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141
investigated for anti-viral, anti-fungal, and anti-bacte- ppt may enhance the therapeutic effect of anticancer
rial activity in vitro. Their study using biological as- drugs. Therefore it may be of benefit to cancer pa-
says in vitro confirmed that some of the ethnobotanical tients by enabling them to use lower doses of antican-
reports of Hawaiian medicinal plants have curative prop- cer drugs to achieve the same or even better results.
erties against infectious diseases. Recent unpublished study completed by Dr Wang
Recently, Duncan demonstrated that scopoletin, a and coworkers demonstrate that a cytotoxic effect of
health promotor in Noni, inhibits the activity of E coli, TNJ on cultured leukemia cell line at various concen-
commonly associated with recent outbreaks resulting tration. The cytotoxicity of TNJ on cultured cancer
in hundreds of serious infections and even death. Noni cells showed a dose-dependent manner by inducing
also helps stomach ulcer through inhibition of the bac- cancer cell necrosis at high doses and apotosid at lower
teria H pylori[44]. doses. T he synergistic effects of T NJ with known
Antiviral activity Umezawa and coworkers found anticancer drugs have been found. At a sub-optimum
a compound isolated from Noni roots named 1-methoxy- dose, both prednisolone and T NJ could induce
2-formyl-3-hydroxyanthraquinone suppressed the cy- apoptosis. When the dose of prednisolone was fixed,
topathic effect of HIV infected MT-4 cells, without in- and the dose of TNJ increased, apoptotic cells were
hibiting cell growth[45]. significantly increased. Therefore, TNJ is able to en-
Anti-tubercular effects In the International hance the efficacy of anticancer drugs such as
Chemical Congress of the Pacific Basin Societies Meet- prednisolone. When a single dose of Taxol induced a
ing in Honolulu, Saludes and colleagues from the lower percentage of apoptosis in leukemia cells, TNJ
Philippines, reported that Noni has been found to kill enhanced the rate of apoptosis to 100 %. T his data
Mycobacterium tuberculosis. A concentration of ex- indicates that TNJ is able to enhance the therapeutic
tracts from Noni leaves killed 89 percent of the bacteria effect of anticancer drugs such as Taxol. This finding
in a test tube, almost as effective as a leading anti-TB may be significant for the combination of anticancer
drug, Rifampcin, which has an inhibition rate of 97 per- drugs with TNJ. It may allow one to decrease the dose
cent at the same concentration. Although there had of synthetic anticancer drugs, increase the tolerance of
been anecdotal reports of the native use of Noni in patients to the toxicity of anticancer drugs, and increase
Polynesia as a medicine against tuberculosis, this is the immune function. This creates a new method in treat-
first report demonstrating the antimycobacterial poten- ing cancer patients.
tial of compounds obtained from the Noni leaf. “I hope In 1993, Hiramatsu and colleagues reported in
that pharmaceutical companies will pay attention to this Cancer Letters the effects of over 500 extracts from
research and explore the Noni plant as a potential source of tropical plants on the K-Ras-NRK cells. Damnacanthal,
drugs,” said Saludes in Manila[46,47]. isolated from Noni roots, is an inhibitor of Ras function.
Antitumor activity In 1992, Hirazumi, a researcher The ras oncogene is believed to be associated with the
at the University of Hawaii, reported anticancer activity signal transduction in several human cancers such as
from the alcohol-precipitate of Noni fruit juice (noni- lung, colon, pancreas, and leukemia[51].
ppt) on lung cancer in C57 Bl/6 mice at the 83th Annual Hiwas a and cow orkers dem onstrated that
Meeting of American Association for Cancer Research. damnacanthal, an anthraquinone compound, isolated
The noni-ppt was shown to significantly prolong the from the Noni root, was reported to have a potent in-
life of mice up to 75 % with implanted Lewis lung car- hibitory activity towards tyrosine kinases such as Lck,
cinoma compared with the control group[48]. It was Src, Lyn, and EGF receptors. In his study, he exam-
concluded that the noni-ppt seems to suppress tumor ined the effects of damnacanthal on ultraviolet ray-in-
growth indirectly by stimulating the immune system[49]. duced apoptosis in ultraviolet-resistant human UVr-1
Improved survival time and curative effects occurred cells. Consequently, the ultraviolet light induced a con-
when noni-ppt was combined with sub-optimal doses current increase in both phosphorylated extracellular
of the standard chemotherapeutic agents such as signal-regulated kinases and stress-activated protein
adriamycin (Adria), cisplatin (CDDP), 5-fluorouracil (5- kinases. After pretreatment with damnacanthal, there
FU), and vincristine (VCR), suggesting important clini- was a stimulatory effect on ultraviolet-induced
cal applications of noni-ppt as a supplemental agent in apoptosis[52 ].
cancer treatment[50 ]. These results indicate that noni- Dong reported that two glycosides extracted fromWang MY et a l / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141 ·1131·
noni-ppt were effective in inhibiting cell transformation male SD rats were divided into three groups, four in
induced by TPA or EGF in the mouse epidermal JB6 each: control, 20 % placebo, 10 % T NJ, and 20 %
cell line. T he inhibition was found to be associated TNJ. Animals were supplied with placebo or TNJ in
with the inhibitory effects of these compounds on AP- drinking water for seven days. On the last day, a hot
1 activity. The compounds also blocked phosphoryla- plate assay was performed on individual animals from
tion of c-Jun, a substrate of JNKs, suggesting that JNKs each group. The hot plate assay is a classical test to
are a critical target for the compounds in mediating AP- examine the animal’s response to heat (55 ºC). The
1 activity and cell transformation[36,53]. response of the animals to the hot plate includes two
Anthelmintic activity An ethanol extract of the phases, acute and lasting. The first sign of discomfort
tender Noni leaves induced paralysis and death of the is that the rat sits up on its hind legs and laps its two
human parasitic nematode worm, Ascaris Lumbricoides, front feet with its mouth. When the pain is too great to
within a day[54 ]. A botanist via Morton reported that be borne by the back paws, the rat kicks its legs, dances,
Noni has been used in the Philippines and Hawaii as an and tries to jump out of the beaker. The time of the
effective insecticide[12]. acute and lasting phase was recorded, respectively.
Analgesic activity Joseph Betz reported that the Compared with the placebo group, the toleration time
Noni fruits possesses analgesic and tranquilizing in the first phase was delayed 276 % in the 10 % TNJ
activites[20]. A French research team led by Younos, group and 419 % in the 20 % TNJ group. The tolera-
tested the analgesic and sedative effects of extracts from tion time of the second phase was delayed 162 % in the
the Morinda citrifolia plant. The extract did “show a 10 % TNJ group and 212 % in the 20 % TNJ group,
significant, dose-related, central analgesic activity in the respectively. Clearly, the data from this experiment in-
treated mice.” They stated that “these findings validate dicated that TNJ was able to make the animals tolerate
the traditional analgesic properties of this plant. ” The more pain. Compared with the placebo group, the length
analgesic efficacy of the Noni extract is 75 % as strong of toleration time was dose-dependent.
as morphine, yet non-addictive and side effect free[55]. Hypotensive activity Dang Van Ho of Vietnam
In cooperation between University of Illinois Col- demonstrated that a total extract of the Noni roots has a
lege of Medicine and Henan Medical University, Wang hypotensive effect[56 ]. Moorthy and coworkers found
and Fu examined the analgesic properties of T NJ in that an ethanol extract of the Noni roots lowered the
animal models. TNJ was tested for its analgesic prop- blood pressure in an anesthetized dog[26]. Youngken’s
erties by the “twisted method” animal model. T he research team determined that a hot water extract of
“twisted method” is a simple and reliable method to Noni roots lowered the blood pressure of an anesthe-
determine the analgesic effect of TNJ. Mice were di- tized dog[57,58]. A Hawaiian physician reported that Noni
vided into four groups: control group, 5 %, 10 %, and fruit juice had a diuretic effect[59].
20 % TNJ groups. TNJ was supplied in the drinking Immunological activity Asahina found that an
water for 10 d. The control group was only supplied alcohol extract of Noni fruit at various concentrations
with drinking water. A chemical named antimony po- inhibited the production of tumor necrosis factor-alpha
tassium tartrate was administrated by ip which produces (TNF-α), which is an endogenous tumor promotor.
twisting due to pain. The number of twists within the Therefore the alcohol extract may inhibit the tumor pro-
first l5 min after injection is recorded to indicate the moting effect of TNF-α [60]. Hirazumi found that noni-
degree of pain. T he number of twists was compared ppt contains a polysaccharide-rich substance that in-
between the control and TNJ groups, using Student’s hibited tumor growth. It did not exert significant cyto-
T-test. There was an 82.30 %, 74.53 %, and 64.29 % toxic effects in adapted cultures of lung cancer cells,
decrease in the number of twists in the 20 %, 10 %, but could activate peritoneal exudate cells to impart pro-
and 5 % TNJ groups, compared to the control. Clearly, found toxicity when co-cultured with the tumor cells.
the analgesic effect of TNJ in mice showed a dose- This suggested the possibility that noni-ppt may sup-
dependent manner. T he analgesic effects of each TNJ press tumor growth through activation of the host im-
group are statistically significant compared with that in mune system. Noni-ppt was also capable of stimulat-
the control group (P·1132· Wang MY et al / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141
ide (NO)[50]. Hokama separated ripe noni fruit juice into The results demonstrate that the frequency of drinking
50 % aqueous alcohol and precipitated fractions that TNJ is more important than the amount. The concen-
stimulated the BALB/c thymus cells in the [3H]thymi- tration of scopoletin in various organs indicates that Noni
dine analysis. It is suggested that inhibition of L ewis is absorbed into different tissues approximately one hour
lung tumors in mice, in part, may have been due to the after administration. The peak concentration in differ-
stimulation of the T-cell immune response[60]. ent tissues occurred at about 3 h, with a rapid decline.
Wang and coworker in University of Illinois Col- Interestingly, the scopoletin level in breast tissue was
lege of Medicine observed that the thymus in animals relatively higher than any other extra-GI tract tissue.
treated with TNJ was enlarged. The wet weight of the Allergenicity and toxicity tests of TNJ Morinda
thymus was 1.7 times that of control animals at the Inc, makers of TNJ, sponsored acute toxicology stud-
seventh day after drinking 10 % TNJ in drinking water. ies in rats to assess the acute toxicity of T NJ. Fifteen
The thymus is an important immune organ in the body, thousand mg/kg was administered via gavage. T he
which generates T cells, involved in the aging process animals were observed for 14 d following treatment.
and cellular immune functions. TNJ may enhance im- All animals survived and no adverse clinical signs were
mune function by stimulating thymus growth, and thus noted. No signs of gross toxicity were seen in the or-
affecting anti-aging and anticancer activities, and pro- gans after necropsy[62 ].
tecting people from other degenerative disease. Two studies using guinea pigs were performed to
Mental health and improved high frequency assess the allergenic risk of TNJ. Both study designs
hearing A small human clinical trial of the effect of included an induction phase and a rest period, followed
TNJ on auditory function and quality of life in the pa- by a challenge with TNJ. T he first study involved two
tients with decreased bone mineral density and auditory test groups of six animals each, a positive control group,
function has been conducted in UIC College of and a negative control group. Following the challenge,
Medicine, Rockford, IL. This study showed that TNJ the animals were observed for 24 h. No allergic reac-
provided a positive benefit on mental health and im- tions to TNJ were seen in this study[63 ].
proved high frequency hearing. The data suggests that The second study involved forty-five guinea pigs.
increased amounts or extended duration of TNJ intake The study consisted of several test groups using vari-
may be required to affect this disorder[61]. ous forms and concentrations of TNJ with accompa-
Pharmacokinetic study of Noni Unpublished nying negative control groups. The test groups were
research on the pharmacokinetics of Noni was carried induced three times each week for two weeks. After
out at the UIC laboratory in Rockford, IL by Dr WANG. thirty-two days of rest, all animals were challenged and
The frequency of consumption and the daily dose of were observed for symptoms of an allergic response.
TNJ are the questions asked most frequently by Noni No positive allergic reactions were seen in any Noni
juice users. T he pharmacokinetics of Noni was stud- group of the animals following the challenge[64].
ied in female SD rats after oral administration at a dose A 13-week oral toxicity study in rats was per-
of 1 mL Noni puree per 100 g body weight. A known formed to further assess the systemic safety of TNJ.
major component (scopoletin) in Noni was chosen as a Eighty Sprague Dawley rats were allocated into four
marker and monitored in the plasma and in different groups; a control group and three dose groups. T he
organs over time by HPLC analysis in the cooperation daily gavage doses included 0.4 mL/kg, 4 mL/kg, and 8
with R & D Department of Morinda, Inc. The pharma- mL/kg. The animals were observed for adverse clini-
cokinetics of scopoletin in Noni puree was calculated cal signs, food consumption, and weight gain.
as follows: the plasma concentration reached a peak at Additionally, blood samples were drawn for hematol-
2 h after oral administration of Noni. The peak level of ogy and clinical chemistry at the study conclusion.
scopoletin decreased to 50 % in 4 h. Only 12 % and 2 Further more, selective organ weights were measured
% of the scopoletin was left in the plasma at 12 and 24 and tissue samples of 55 organs were taken for micro-
h, respectively. Absorption was rapid, with 50 % peak scopic examination. All groups showed no treatment
concentration reached in only 30 min. In order to main- related differences in body and organ weights, food
tain a higher blood level of scopoletin, TNJ should be consumption, clinical examinations, blood chemistry,
taken every 2 to 4 h. For overall health maintenance, hematological measurements, and histological tissue
TNJ should be taken in one-ounce servings every 12 h. examination[65].Wang MY et a l / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141 ·1133·
Morinda, Inc. sponsored a second 13-week oral symptoms. E ighty percent of the people with heart
toxicity study of TNJ. This study covers higher doses disease experienced a decrease of their symptoms.
than the previous 13-week study. Three dose groups Eighty-three percent of patients with Type 1 and 2 dia-
were included in this study. The samples evaluated betes experienced a noticeable change in their condition.
were a single strength T NJ, a 2. 5 times concentrated Eighty-nine percent of the people experienced improved
TNJ, and a 4 times concentrated T NJ. The concen- digestion. Eight-five percent of people with allergies
trated samples were used to reach a dosing equivalent experienced a decrease in their symptoms. Seventy-
of 50 mL/kg body weight and 80 mL/kg body weight. seven percent of people with depression experienced
The protocol and measurements for the second 13-week lessening of symptoms. Side effects among all partici-
study were the same as the first. The results of this pants were minimal or nonexistent. He summarized the
study demonstrate that the No-Observable-Adverse- data and wrote several phamplets and books explaining
Effect-L evel (NOAE L) was above 20 mL of 4 times his findings[75-79]. He indicated that nearly all the data
concentrated T NJ/kg/day. This is equivalent to 80 mL comes from individuals using T NJ marketed by
TNJ/kg/day. Perspectively, this amount is 8% of the Morinda, Inc.
animal’s body weight[53].
No upper limit for safe consumption has yet been CANCER PREVENTION STUDY OF TNJ
determined from these studies. The data indicates that “To take medicine only when you are sick is like
TNJ may be safely consumed in amounts that are typi- digging a well only when you are thirsty — is it not
cal for fruit juice beverages, though the results of these already too late?” (Chi Po, c 2500 BC). This proverb
studies only apply directly to Morinda TNJ. Additional suggests that prevention is more important than treat-
ingredients and processing methods are different for ment[80,81].
other commercial noni fruit juice products. Cancer is the second leading cause of death in the
The major ingredient in TNJ, Noni fruit, has been US. According to the American Cancer Society, 1500
safely consumed in other parts of the world for several people per day die from cancer in the United States.
hundred years[6-7,10,66-74]. TNJ is demonstrated to be safe Fighting against cancer is a great task for the scientists
for human consumption through extensive chemical, engaged in this field. The etiology of most cases of
microbiological, and toxicological analysis and human cancer remains unknown[82]. E nvironmental
evaluation. carcinogen exposure accounts for more than 90 % of
Statistical clinical survey Recently, Neil human cancer[83]. Cigarette smoke is the number one
Solomon, formerly Maryland’s first Secretary of Health high-risk environmental factor[84]. Although some can-
and Mental Hygiene, finished a statistical clinical sur- cers are preventable, a means to prevent most cancers
vey that offers a fairly accurate picture of Noni’s me- is not yet known. Seeking a natural way to prevent
dicinal benefits. He has written books on Noni juice human cancer is an urgent task for cancer prevention
and visited more than 50 doctors and health profes- investigators.
sionals whose patients previously used or are using Noni The studies of food, diet, and cancer indicate that
to treat different conditions. After reviewing the re- lifestyle changes include eating more fruits and
sults of the more than 10 000 Noni juice users, he de- vegetables, and quitting smoking will benefit cancer
termined that Noni possesses a variety of efficacious prevention. “A new plate” for America (75 %
medical properties that modern medicine should not vegetables, 25 % meat) appeared at the 2001 annual
ignore. Sixty-seven percent of 847 people with cancer conference of the American Institute for Cancer Re-
experienced significant lessening of their symptoms. search[85]. Although TNJ possesses a broad range of
Ninety-one percent of patients who used Noni juice therapeutic effects, the cancer preventive effect of TNJ
noticed an increase in energy levels. Seventy-two per- remains unclear. A ne w hypothesis h as been
cent of overweight patient lost weight. Eighty-seven investigated; whether or not T NJ possesses a cancer
percent of those drinking Noni juice for high blood pres- preventive effect at the initiation stage of chemical
sure experienced a significant drop in blood pressure. carcinogenesis.
Nearly ninety percent of those with chronic pain expe- This hypothesis was examined using two carci-
rienced a significant decrease in pain. Eighty percent nogenic animal models and one human clinical study of
of arthritis sufferers reported a lessening of arthritic a group of current smokers at the University of Illinois·1134· Wang MY et al / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141
at Chicago, College of Medicine, Rockford, Illinois, DMBA and T NJ groups. TNJ was continuously sup-
USA. The animal models included the following: the pli ed for an ad dition al 90 days a fter D MBA
DMBA-induced mammary gland tumorigenesis administration. All the animals were sacrificed at the
model[86] and an acute liver injury model induced by a 8th month after DMBA administration to examine the
liver carcinogen, carbon tetrachloride (CCl4)[87]. These pathological changes in the mammary glands by light
are classical extrinsic carcinogenic models. DMBA in- microscopy. Compared to controls, the DMBA treated
duced DNA adduct formation, in addition to histologi- group showed a variety of lesions, including epithelial
cal examination by light and electron microscopy, was hyperplasias (12.5 %), benign tumors (25 %), and in-
chosen as a sensitive biomarker to evaluate the preven- situ carcinomas (25 %). No benign tumors or carcino-
tive effect of TNJ at the initiation stage of multiple step mas were found in the TNJ group, which showed nor-
carcinogenesis. In the mammary breast carcinogenic mal histology or mild hyperplasia. These results indi-
model, the focus was on the pathogenic changes after cate that TNJ may prevent mammary breast cancer at
DMBA administration, to monitor the mechanisms of the initiation stage of chemical carcinogenesis[94].
carcinogenesis and DMBA DNA-adduct formation in Protective effect of TNJ on liver injury induced
mammary tissue. In the acute liver injury model, the by a liver carcinogen (CCl4) In this study, the pre-
histopathological changes of liver tissue and the super- ventive effect of TNJ on carbon tetrachloride (CCl4)-
oxide anion free radicals (SAR) and lipid hydroperoxide induced liver injury in female SD rats was examined by
(LPO) levels after CCl4 administration were the focus. light microscopy (LM) and electron microscopy (EM)
Carcinogen DMBA DNA-adduct formation was examination. Liver sections in placebo and TNJ groups
used as a marker to examine whether T NJ is able to demonstrated normal lobular architecture and normal
prevent carcinogen induced DNA damage. Based upon ultrastructure at the LM level. Liver sections in the
scientific evidence, most chemical carcinogens need placebo+CCl4 group showed acute liver damage at the
activation by our body enzymes to be transformed to LM level: which includes focal vacuolated, lipid-con-
an ultimate form that readily binds to genetic DNA to taining or necrotic hepatocytes surrounding central veins
form DNA-adducts[88]. Carcinogen-DNA adduct for- and focal inflammatory cells scattered throughout the
mation is an important “DNA damage” marker that pre- lobule. There was a significant decrease in the number
dicts the possibility of cancer development. Most sci- of swollen, lipid containing, and apoptotic hepatocytes
entists agree that carcinogen induced DNA adduct for- in the TNJ+CCl4 group, compared to the placebo+CCl4.
mation is an early critical step in the multiple stages of At the EM level, glycogen depletion and lipid droplets in
carcinogenesis[89 ]. Carcinogen-DNA adducts can be the cell plasma were observed in both CCl4 treated
repaired by body enzymes. T he unrepaired adducts groups. Swollen mitochondria, disorganization of rough
will be fixed after one cell cycle[90 ]. The unrepaired, endoplasmic reticulum (RER) with loss of ribosomes,
fixed DNA damage will be responsible for mutation and and abundant focal areas of smooth endoplasmic reticu-
the consequent cancer development[91, 92]. Therefore, lum (SER) were scattered throughout the cytoplasm.
preventing carcinogen-DNA adduct formation is a key Interestingly, Golgi complexes in placebo+CCl4 group
step for cancer prevention at the initiation step of car- contain small low-density vesicles. Golgi complexes in
cinogenesis[93]. If TNJ can prevent and/or block the the T NJ+CCl4 group contain large vesicles with in-
formation of carcinogen induced DNA adducts, it may creased electron density, and Golgi cisternal stacks were
prevent cancer at the initiation stage of multiple stage well developed. Those in the placebo+CCl4 group were
carcinogenesis. often swollen and diminished[95].
Cancer preventive effect of TNJ at the initia- Mechanism studies of the cancer preventive
tion stage of mammary breast carcinogenesis The effect of TNJ
cancer preventive effect of TNJ at the initiation stage Prevention of chemical carcinogen-DNA-ad-
of mammary breast carcinogenesis, induced by DMBA, duct formation Female SD rats were divided into two
was examined in female Sprague-Dawley (SD) rats. groups of six each. The control group was given regu-
The experiment was started at the 35th postnatal day lar drinking water and rat chow, ad libitum. The TNJ
with water in an age-matched control group, a DMBA group was given 10 % T NJ in drinking water and rat
group, and a 5 % TNJ group. DMBA (25 mg/kg) was chow, ad libitum. One week later, three animals from
administrated by mouth at the 50th postnatal day in the each group received intragastrically 25 mg/kg of DMBAWang MY et a l / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141 ·1135·
containing 5 % dimethysulfoxide in corn oil. All ani- (a) In vitro TNJ showed a dose-dependent inhi-
mals were sacrificed 24 h later. DNA was isolated from bition of both LPO and SAR. The SAR scavenging
liver, lung, heart, and kidney. The DNA adducts were activity of TNJ was compared to that of three known
analyzed by 32P-postlabeling technique. After one week antioxidants: Vitamin C, grape seed powder, and
of consumption, the TNJ group showed a reduction in Pycnogenol at the daily dose per serving level recom-
both the number and level of DMBA-DNA adducts from m e nd e d b y US R D A’s or m a nu f a ct u r er ’s
each of the four organs studied. The quantitative esti- recommendations. Under the experimental conditions,
mate after radioactive counting indicated that TNJ re- the SAR scavenging activity of TNJ was shown to be
duced the amount of DNA adduct formation by 80 % 2.8 times that of vitamin C, 1.4 times that of Pycnogenol,
in kidney, 42 % in liver, 41 % in lung, and 26 % in and 1. 1 times that of grape seed powder. Therefore
heart. Even more dramatic experimental results were TNJ has a great potential to scavenge reactive oxygen
obtained using male C57 BL-6 mice. We found that free radicals[105,106].
TNJ was able to reduce the formation of DMBA-DNA (b) In an acute liver injury model induced by car-
adducts by 90 % in kidney, 70 % in liver, 60 % in heart, bon tetrachloride Carbon tetrachloride is a liver car-
and 50 % in lung. This is the first finding of the cancer cinogen and lipid hydroperoxidation inducer. To fur-
preventive effect at the initiation stage of carcinogen- ther confirm the antioxidant activity of TNJ in vivo, a
esis by TNJ[96, 97]. T his preliminary data indicates that carbon tetrachloride induced liver injury model in fe-
TNJ may prevent cancer at the initiation stage of male SD rats was selected. Ten percent of TNJ in
carcinogenesis. drinking water for 12 d was able to reduce the liver
Antioxidant activity of TNJ In order to explore LPO and SAR levels to 20 % and 50 % of that observed
the mechanisms of the cancer preventive effect of TNJ, in the placebo group 3 h after CCl4 administration. In
the antioxidant activity was examined. It is known that conclusion, TNJ may protect liver from an extrinsic
oxidative damage induced by reactive free radicals is carcinogenic CCl4 exposure[96,1 07].
involved in the development of cancer[98]. Epidemio- (c) In current smokers Cigarette smoking has been
logical studies demonstrated that consuming fruits and implicated in the pathogenesis of emphysema, ischemic
vegetable reduced free radical-induced oxidative dam- heart diseases, and cancer[108-110]. A series of authorita-
age and the consequent lipid peroxidation, therefore re- tive reports by the U.S. Public Health Service and other
ducing cancer risk[99,100]. It is believed that fruits and international scientific organizations has conclusively
vegetable are major sources of antioxidants[101,102]. Noni documented a causal relationship between cigarette
is a medicinal plant that helps different health condi- smoking and cancer in men and women[111]. There are
tions in many different ways. It was hypothesized that 48 known chemical carcinogens among the 4000 com-
the antioxidant activity of TNJ may protect individuals pounds detected in cigarettes. Most recently, it was
from oxygen free radicals and consequent lipid reported that 227 possible carcinogens exist in cigarettes.
peroxidation. In order to examine this hypothesis, the It was estimated that some 1×1017 oxidant molecules
antioxidant activity of TNJ was analyzed. The study are present in each puff of cigarette smoke[112]. Free
was designed to measure how well TNJ scavenged radicals are known to cause oxidative damage and con-
superoxide anion radicals (SAR) and quenched lipid sequent lipid peroxidation, which are involved in the
peroxides (L PO) by TNB assay and LMB assay, re- pathogenesis of human diseases. The induction of lipid
spectively[103-104]. SAR scavenging activity was exam- peroxidation largely results from free radical reactions
ined in vitro by tetrazolium nitroblue (TNB) assay. In with polyunsaturated fa tty acids in biological
TNB assay, SAR reduces TNB into formazan blue, membranes. The unsaturated bonds undergo autocata-
which absorbs at 602 nm. A SAR scavenger, such as lytic or enzymatic processing to form harmful lipid
TNJ, reduces the absorbency by reacting with SAR. hydroperoxides. The active lipid hydroperoxides may
In this assay, a standard curve is produced when SAR be qu ic kly co nve rt ed to al deh yde s, su ch as
are generated from NADH under aerobic conditions, ma lo nd ia ld eh yd e, a nd a lk en al s, s uc h as 4 -
with phenazine methosulfate as a catalyst. In L MB hydroxynonenal. All of these are very active in DNA
assay, LPO oxidizes leucomethylene to methylene blue binding and are responsible for major indigenous cell
in the presence of hemoglobin. The resultant blue color damage[113,115]. Epidemiological studies have demon-
can be quantified spectrophotometrically at 660 nm. strated that consuming fruits and vegetables reduce free·1136· Wang MY et al / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141
radical-induced oxidative damage and lipid peroxidation fore the inhibition of COX-2 might have a general can-
in cigarette smokers, therefore reducing cancer cer preventive effect via anti-inflammatory activity and
risks [116,117]. It is believed that fruits and vegetable are decrease angiogenesis. In this study, the selectivity of
major sources of antioxidants. Consequently, it was COX-2 inhibition of T NJ versus COX-1 in vitro was
hypothesized that antioxidants in TNJ may protect indi- investigated. T he inhibitions of T NJ on COX-2 and
viduals from cigarette smoke by scavenging oxygen free COX-1 activities were compared with that of the tradi-
radicals and quenching lipid peroxides. tional NSAIDs such as Aspirin, Indomethacin, and a
In order to examine this hypothesis, a one-month known selective COX-2 inhibitor, Celebrex[129-131]. The
double blinded, randomized, and placebo-controlled COX-1 and COX-2 activities were determined based
clinical trial was designed to test the protective effect upon the PGE2 levels generated during the incubations
of TNJ on plasma SAR and LPO in current smokers. of human platelets with tested compounds and/or ve-
The subjects were supplemented daily with two ounces hicle by the Amersham ELA assay[132]. The IC50 of TNJ,
of TNJ (n=38) or placebo (n=30), twice a day for 30 d. Aspirin, Indomethacin, and Celebrex on COX-1 are
The plasma SAR and LPO levels were determined be- 5 %, 4.55 µmol/L, 0.01 µmol/L, and 1.4 µmol/L, respec-
fore and after trial by TNB and LPO assay, respectively. tively, and that for COX-2 are 3.8 %, 595 µmol/L, 0.4
There was no effect observed on plasma SAR (0. 23± µmol/L, and 0.47 µmol/L respectively. The data was
0.15 versus 0.21±0.17 µmol/mL) and L PO (0.58±0.22 converted into a ratio of IC50 COX-2/COX-1. It was
versus 0.59±0.21 µmol/mL) in the placebo group. The 0.76 for TNJ, 119 for Aspirin, 40 for Indomethacin,
LPO and SAR levels in the T NJ group showed 23 % and 0.34 for Celebrex. These results show that the
reduction (0.59±0.21 µmol/mL versus 0.45±0.20 µmol/ selectivity of COX-2 inhibition of TNJ is comparable
mL, P=0.06) and 27 % reduction (0.23±0.18 µmol/mL with that of Celebrex. The discovery of the selective
versus 0. 17±0. 10 µmol/mL, PWang MY et a l / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141 ·1137·
lished next year. Cigarette-smoke is not only involved When used properly, food can regulate Yin, Yang,
in cancer, but also involved in pulmonary, heart, and Qi, and blood. According to TCM, each item of food
other degenerative diseases. Therefore drinking TNJ has its own property (cool, cold, warm, hot, and plain).
may be beneficial for the prevention of heart, lung, and To simplify this concept the five categories have been
brain diseases, as well as delaying the aging processing, collapsed to three-cool/cold, warm/hot, and plain. Cold
and maintaining overall good health. and cool foods are used to treat diseases of a hot nature.
Hot and warm foods are used in treating diseases with
NONI: YIN & YANG a cold nature. The plain foods such as apple, rice, and
The Yellow Emperor of China (2695¯2589 BC), milk are used in treating both hot and cold diseases as
Huang Di, an ancient Chinese physician born 2200 years general tonics. Food in TCM is applied in four ways:
earlier than Hippocrates (460.c-375 BC), created the diet, tonic, medicine, and abstention. Food as a diet
principle of Yin & Yang. He taught “Yin/Yang are the means that food provides the necessary substances for
way of Heaven and Earth, the great principle and out- life, growth, and health. Food as a tonic refers to using
line of everything, the parents of changes, the root and food to treat individuals who have general weakness,
source of life and death, and the palace of gods. Treat- but not a specific disease, or for those who are recov-
ment of disease should be based upon the roots of Yin/ ering from an ailment and need added strength. Food,
Yang.” The theory of Yin/Yang indicates that every as a medicine refers to using specific foodstuffs to cor-
object in the universe consists of two opposite aspects, rect imbalances that have led to disease states with par-
which are in continual mutual restriction and interaction. ticular signs and symptoms. Finally, food as an ab-
Yin/Yang theory has been used in many different ways stention refers to the practice of avoiding foods that
in Chinese philosophy[134], especially in biological and would make a disease condition or imbalance in the body
medical fields. According to Traditional Chinese Medi- to worsen. For example: avoid eating hot pepper, old
cine (TCM), the human body is an integrated whole. ginger, mutton, or liquor, which produces “fire” (heat)
Diagnosis and treatment is founded in the concept of in the body, during acute inflammation, acute
an integral human body, and decided through careful conjunctivitis, or high fever; because all these diseases
identification of Yin and Yang based upon the signs and are characterized by too much heat or excessive Yang[136].
symptoms in an individual. A healthy body depends on According to the Yin/Yang, five elements, and Zang
the balance of Yin and Yang, and all diseases result from Fu theories, human health is the results of a Yin/Yang
the imbalance of Yin and Yang. When these two forces balance[137]. In any case, if the Yin/Yang balance is
are in balance, whether it occurs in a meal, a person, or disrupted, harmony and balance broken, disease will
in nature, harmony and equilibrium are achieved. occur as a consequence. There are millions of pairings
The basic nutritional theories of TCM arise through of Yin and Yang in the human body; every element, cell,
the concepts of Yin/Yang and Qi. Yin/Yang is a compli- organ and system has its pair of Yin and Yang. The net
cated philosophical concept. Yin literally translates as results from the interaction of these micro-Yin and Yang
“in the shade,” and is considered to represent darkness, pairings are manifested as macro-Yin and Yang of our
the moon, coldness, and passivity. Yang, “in the sun- health. They interact and strike a dynamic balance to
light,” on the other hand, represents light, sun, heat, achieve normal well-being. The Noni plant like other
and activity. Yin represents all kinds of inadequate un- herbs acts as a Yin/Yang regulator from micro-Yin and
der-functioning such as cold, fatigue, and general Yang to macro-Yin and Yang to benefit many different
weakness. Yang represents all kinds of detrimental over health problems, sometimes benefiting two opposite
functioning such as fever, hyper-reactivity, and red health conditions such as diarrhea and constipation. Due
swelling (skin). Qi is known as vital energy that repre- to the limited scientific data, the Yin/Yang theory may
sents various functions of the body. Blood is a con- be the best way to explain the beneficial effects of the
ceptual term that refers to the material basis of Qi or Noni plant through the regulation of balance between
the comprehensive material that represents all internal Yin and Yang. That is why one simple plant can do so
organs. T herefore, blood and Qi are often linked many things in so many different ways. Based upon
together. Keep in mind that this use of the word blood TCM, the Noni plant is able to tonify Qi, clear heat and
is different from the understanding with blood as it is toxins, and invigorate the blood. The properties of this
used in modern medicine[135]. plant are sweet, stinky, and neutral. Noni enters the·1138· Wang MY et al / Acta Pharma col Sin 2002 De c; 23 (1 2): 1127 -1141
lung, spleen, liver, and kidney meridians. Therefore juice. 2nd ed. Woodland Publishing; 1999.
Noni is beneficial for many different health conditions. 17 Allen WH, London C. Some information on the ethnobotani-
cal properties of Noni (Mor inda citr ifolia). In: The useful
By TCM, the quality of the herb and nutritional
plants of india; 1873.
components contained in the plants are directly related 18 Abbott IA. The geographic origin of the plants most com-
to the soil in which they grow. The terrain, the weather, monly used for medicine by Hawaiians. J Ethnopharmacol
geographic local, and other factors affect what are con- 1985; 14: 213-22.
tained in the plants because they affect soil conditions. 19 Bus hnell OA, Fukuda M, Makinodian T. The antibacterial
The tropical Noni plant grown in Tahiti is recognized as properties of some plants found in Hawaii. P acific Science
1950; 4: 167-83.
the best Noni because the air is clean, the water is pure,
20 Pride Publishing, Noni: Polynesia’s natural pharmacy. 1997.
and the soil is rich in abundant micronutrients. T he p 13.
island group known as French Polynesia (Tahiti) is con- 21 Levand O, Larson HO . S ome chemical cons tituents of
sidered to be the source of the finest and most potent Morinda citrifolia. Planta Med 1979; 36: 186-7.
Noni in the world[40]. 22 Farine JP, Legal L, M oreteau B, Le Quere JL. Volatile com-
ponents of ripe fruits of Mor inda citr ifolia and their effects
on Drosophila. Phytochemistry 1996; 41: 433-8.
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