Noni (Morinda citrifolia) is an island fruit with a rich culture and a reputation as a natural healer. Its benefits are often claimed to include everything from pain relief and cellular repair to weight loss and more. However, research on the fruit and its juice is limited, with many studies involving small sample sizes or no placebo group. In addition, much of the evidence supporting claims of Noni Effectiveness comes from studies conducted by researchers employed by Morinda Inc, the company that manufactures the juice and has a financial incentive to publish positive results.
Among the Polynesian people, Noni was used to treat infections of all kinds, from the common cold to intestinal parasites. Modern scientific tests have shown that the plant has antimicrobial, antiviral, and anti-parasitic activity. It also contains a number of compounds that can reduce inflammation. For example, a polysaccharide molecule found in noni (damnacthal) inhibits the histamine H1 receptor, thereby blocking angiogenesis and reducing inflammatory pain.
Other studies have demonstrated that ingesting noni can help boost immune function and prevent aging-related diseases. For example, a study of mixed noni juice consumption and other dietary interventions found that the average age at onset (ASA) for those who regularly consumed the juice was 2.07 years less than that of people who never drank it. The results are attributed to the antioxidant properties of the juice, particularly the iridoids.
Another potential benefit of consuming noni is its ability to boost energy and improve sleep quality. The juice is believed to stimulate the production of serotonin and melatonin, two hormones that have a significant impact on mood and emotions. In addition, melatonin can regulate the Circadian rhythm and promote restful sleep. Noni may also have a beneficial effect on blood pressure and gingivitis. Two studies found that consuming noni juice decreased both systolic and diastolic blood pressure.
In addition, noni can have a positive effect on lipid levels. A study examining the effects of noni on blood cholesterol levels found that regular consumption led to a decrease in LDL cholesterol while maintaining HDL cholesterol. Similarly, a study comparing systolic and diastolic BP in healthy people who drank noni juice or a control beverage found that the former experienced significantly lower systolic and diastolic readings than those who did not drink the juice.
A few studies have also suggested that the use of noni can be helpful in relieving joint discomfort and promoting bone health. This benefit is attributed to the fact that some of the fatty acids in noni, especially the monounsaturated ones, can have anti-inflammatory and antioxidant properties. In addition, the xeronine found in noni may increase the activity of certain cells and enhance their ability to repair themselves.