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Limited evidenceGut health

Haritaki (Terminalia Chebula)

The Ayurvedic fruit best known as a component of Triphala, taken for regularity and detox. A few small Indian trials look at metabolic and microbiome markers, and none has tested it for constipation.

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What the science says

  • Gut microbiome Limited evidence

    A double-blind randomized placebo-controlled pilot study of Triphala, which contains haritaki, reported shifts in gut bacterial composition. It was a pilot in a small group and measured no bowel symptoms.

  • Metabolic and vascular markers Limited evidence

    A randomized double-blind placebo-controlled study of Terminalia chebula extract in type 2 diabetes found improvements in endothelial function and inflammatory markers. A single small trial with surrogate endpoints.

  • Constipation and regularity Limited evidence

    Despite its central traditional use as a laxative, no controlled trial has tested haritaki alone for stool frequency or constipation. The claim rests entirely on tradition.

Dosage & safety

Studied doseTrials used 250–500 mg of standardized extract twice daily; traditional use is 1–3 g of fruit powder at night. Triphala studies used about 1 g/day of the combined formula.
SafetyLoose stools and cramping at higher doses. It may lower blood sugar, so watch for interaction with diabetes medication. Avoid in pregnancy, in dehydration, and in chronic diarrhoea.

How to take it

TimingAt night, which is the traditional pattern and suits the laxative effect.
With food?With warm water; food is optional.
Worth knowingStart at the bottom of the range — the loose stools and cramping are dose-dependent and are the reason most people stop.

Interactions

With medications

  • insulin, sulfonylureas and other diabetes medication

    Haritaki can lower blood glucose, adding to the drug's effect. monitor your glucose more closely when you start

  • any oral medication

    Its laxative effect speeds transit and can reduce how much of a drug you absorb. separate other oral medicines by at least 2 hours

Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.

Frequently asked questions

Does haritaki work for constipation?

Haritaki has never been tested alone for constipation in a controlled trial, so its laxative reputation rests on tradition and the evidence is limited.

How much haritaki should I take?

Trials used 250–500 mg of standardized haritaki extract twice daily; traditional use is 1–3 g of fruit powder at night with warm water. Start at the bottom of the range, since loose stools and cramping are dose-dependent.

Does haritaki lower blood sugar?

One small placebo-controlled trial of Terminalia chebula extract in type 2 diabetes found better endothelial function and inflammatory markers, which is limited evidence. Haritaki may lower blood glucose, so monitor closely if you take diabetes medication.

Can I take haritaki with other medications?

Separate other oral medicines from haritaki by at least 2 hours, since its laxative effect speeds transit and can reduce drug absorption. Avoid haritaki in pregnancy, dehydration and chronic diarrhoea.

Scientific references

Related in Gut health

Herbal medicines: what the evidence says (335)