Noni
Morinda citrifolia
Description
overall appearance
A small to medium evergreen tree or large shrub, 3–10 m tall, with large, glossy leaves and distinctive knobby, multiple-lobed green-to-white fruits. Produces fruit continuously year-round in tropical conditions. Has a strong, pungent odor when fruit is ripe, sometimes described as rancid cheese.
roots
Well-developed taproot; lateral roots spread widely; produces red dye (morindone) in roots; drought-tolerant root system adapted to coastal and volcanic soils
stem
Single to multi-stemmed; bark is gray-brown, smooth to slightly furrowed; young stems are square and green; wood is hard, yellow-orange
leaves
Opposite, large, elliptic to ovate, 15–30 cm long by 8–18 cm wide; dark green, glossy above; prominent veins; stipulate; margins entire; short petioles
flowers
Small, white, tubular, 5-lobed, 1–1.5 cm; fragrant; in spherical heads 1–3 cm arising from leaf axils; blooms year-round
fruits/seeds
Syncarp (multiple fused drupes) 5–10 cm long; ovoid, bumpy with polyhedral sections; green-white to yellowish when ripe; soft, translucent flesh; pungent odor; each section contains 1 brown triangular seed
Active Compounds
Traditional Uses
- Polynesian traditional medicine used noni (nonu/nono) for over 2000 years for infections, wounds, inflammation, and as a general tonic
- Hawaiian traditional healing (la'au lapa'au) uses noni leaves for joint pain, skin conditions, and cardiovascular support
- Samoan and Tongan folk medicine uses noni fruit for colds, flu, and as a pain reliever, particularly for arthritis
- Traditional Southeast Asian (Indonesian, Malaysian) use of leaves and roots for skin infections, wounds, and as a febrifuge
- Ayurvedic tradition uses related Morinda species (Indian mulberry) for liver disorders and as an adaptogen
- Traditional use in Cook Islands as a nutritional supplement during illness and as a treatment for diabetes
- Bark used as a red/yellow dye in Pacific traditional crafts (morindone pigment)
- Seeds used topically in Pacific Island folk medicine for skin infections and as insect repellent
Modern Applications
- Antioxidant: scopoletin and quercetin provide significant free radical scavenging; ORAC value of noni juice is moderate
- Anti-inflammatory: scopoletin inhibits COX-1 and COX-2 comparable to NSAIDs in animal studies; supported by traditional use
- Immunomodulatory: polysaccharide fractions show NK cell activation and macrophage stimulation in animal and cell studies
- Analgesic: animal studies show significant pain reduction with noni extract; mechanism involves central opioidergic pathways
- Anti-tumor: damnacanthal inhibits Ras oncogene function and shows cytotoxicity in multiple cancer cell lines in vitro
- Antimicrobial: noni extract inhibits Staphylococcus, E. coli, Candida, and Mycobacterium tuberculosis in vitro
- Cardiovascular: limited human studies suggest noni juice reduces LDL, inflammatory markers, and blood pressure in smokers
- Hepatoprotective: iridoid glycosides protect liver cells from oxidative and toxic damage in animal models
⚠️ Safety Information
Contraindications
- Chronic kidney disease: high potassium content (hyperkalemia risk) and possible nephrotoxic anthraquinones; contraindicated with renal failure
- Liver disease: rare but documented cases of hepatotoxicity attributed to noni juice; avoid with pre-existing liver disease
- Pregnancy: insufficient safety data; anthraquinones may stimulate uterine contractions
- Hyperkalemia: noni juice significantly raises serum potassium; contraindicated with potassium-sparing diuretics and ACE inhibitors
Side Effects
- Hepatotoxicity: case reports of liver failure associated with noni juice consumption; rare but serious
- Hyperkalemia: significantly elevated potassium levels, especially dangerous with kidney disease
- Gastrointestinal effects: diarrhea, nausea, and stomach upset particularly with large doses
- Strong unpleasant odor and taste may cause nausea
- Rare allergic reactions
Drug Interactions
- ACE inhibitors and potassium-sparing diuretics (spironolactone): additive hyperkalemia risk; potentially life-threatening
- Warfarin: flavonoids and coumarins may alter INR; monitor closely
- Immunosuppressants (cyclosporine): immunomodulatory polysaccharides may interfere with transplant medications
- Hepatotoxic drugs: additive liver toxicity risk
Parts Used
- Ripe fruit and juice (primary modern use)
- Leaves (traditional)
- Root and root bark (traditional, dye)
- Seeds (topical oil)
Preparation Methods
Noni juice (fermented or fresh-pressed): 30–90 ml/day, typically taken on empty stomach; commercially available standardized products
Noni powder capsules: 500–2000 mg/day dried fruit powder; less potent but more palatable than juice
Noni leaf tea: 2–5 g dried leaves in 250 ml boiling water, steep 10 minutes; 2 cups/day for inflammation
Standardized extract (10:1 concentration): 100–300 mg/day
Topical leaf poultice: fresh bruised leaves applied to joints and skin lesions for 20–30 minutes
Seed oil (cold-pressed): applied topically for skin conditions and hair treatment; 1–2 ml/application
Related Plants
Cat's Claw
Uncaria tomentosa
Cleavers
Galium aparine
Partridge Berry
Mitchella repens
Moringa
Moringa oleifera
Acai
Euterpe oleracea
Arjuna
Terminalia arjuna