Benefit of noni fruit. According to traditional medicine, noni fruit has an astringent taste and is associated with the kidney and large intestine meridians. It is known to have laxative, diuretic, blood-activating, and menstrual-regulating properties. Accordingly, noni fruit is often used to treat constipation, difficulty urinating, regulate menstruation, reduce fever, treat coughs, asthma, and help strengthen the body’s immune system and resistance. In addition, noni fruit also has many health benefits.