Supplement analysis backed by scientific evidence · PT

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Limited evidenceGeneral health

Noni

Noni juice is among the most aggressively marketed cure-all supplements and among the least supported: after decades of sales there is still no adequately powered trial showing benefit for any condition, and there is a documented signal for idiosyncratic liver injury.

What the science says

  • Boosts energy, immunity and general wellbeing Limited evidence

    A comprehensive phytochemistry, pharmacology and safety review found that the marketed indications rest on traditional use, in vitro assays and animal work rather than controlled human trials. The human studies that exist are small, single-centre, frequently unblinded, and heavily weighted toward dental and topical applications rather than the systemic benefits sold on the bottle.

  • Anti-inflammatory and analgesic effects Limited evidence

    Noni contains iridoids, scopoletin and damnacanthal with real in vitro activity, and a small randomized trial in primary dysmenorrhoea has been published. No trial is large enough, long enough or well controlled enough to support a clinical anti-inflammatory claim, and no replication exists.

  • Anticancer benefit Limited evidence

    This is the most dangerous claim attached to noni and it has no clinical support. Cytotoxicity in cell lines and rodent tumour models has never translated into a human trial showing tumour response or survival benefit. The US FDA has issued warning letters to noni marketers specifically over cancer and disease claims.

  • Safe because it is just fruit juice Limited evidence

    Multiple case reports describe acute hepatitis temporally linked to noni juice consumption, some with resolution after stopping and recurrence on rechallenge. Regulators kept noni juice authorised as a novel food while explicitly noting that idiosyncratic liver reactions in susceptible individuals cannot be excluded.

Dosage & safety

Studied doseMarketed doses are typically 30–100 mL/day of juice, or 500 mg capsules once or twice daily. No dose has been shown effective for any indication; the European novel-food assessment considered habitual intakes around 30 mL/day. There is no evidence-based dose to recommend.
SafetyCase reports of acute hepatitis, including severe cases, are the main concern — avoid entirely if you have liver disease or take hepatotoxic medication, and stop immediately for jaundice, dark urine or unexplained fatigue. Noni juice is high in potassium and has caused hyperkalemia in people with chronic kidney disease; avoid on potassium restriction or with potassium-sparing diuretics and ACE inhibitors. Common minor effects are bitter taste, nausea and loose stools. Regulatory status: authorised as a novel food in the EU with post-market monitoring following hepatotoxicity reports; US FDA has repeatedly issued warning letters over unapproved disease claims. Not for use in pregnancy — traditional use includes abortifacient preparations.

Scientific references

Where to buy

Dynamic Health, Certified Organic Noni Juice, 32 fl oz (946 ml)

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