Haritaki

Terminalia chebula Retz. was published by Retzius in Observationes Botanicae in 1788, and POWO accepts the name. It belongs to the family Combretaceae and to Terminalia, a pantropical genus of about 200 species according to PROTA (Plant Resources of Tropical Africa). POWO gives its native range as Assam, Bangladesh, Cambodia, south-central China, the eastern and western Himalaya, India, Laos, Myanmar, Nepal, Sri Lanka, Thailand, and Vietnam, and records it as introduced in southeastern China, the Malay Peninsula, Pakistan, Taiwan, and the Democratic Republic of the Congo. The Flora of China treats it as native only in western Yunnan and cultivated elsewhere in southern China, and it recognizes two varieties, var. chebula and var. tomentella; the Chinese Pharmacopoeia accepts the dried ripe fruit of both. Older names include Terminalia parviflora, T. reticulata, T. tomentella, and T. zeylanica, and Ratha and Joshi (Ayu 2013) note that the related T. citrina and T. pallida are sold in some regions as a substitute or an adulterant.

PROTA describes a deciduous tree up to 30 m tall, usually with a short, straight trunk up to 10 m long and 80 cm or more across, dark brown bark cracked into woody scales, and a rounded crown of spreading branches. The leaves are alternate or nearly opposite, ovate to elliptic, 7–15 cm long, with a stalk 1–3 cm long bearing two small glands near its tip; the Flora of China allows leaves up to 18 cm. After several months leafless, the tree flowers along with its new leaves: small, yellowish-white, petal-less flowers with ten protruding stamens, crowded on spikes a few centimeters long. PROTA calls their scent unpleasant, while the Flora of China calls it slightly fragrant. The fruit ripens about eight months later and falls soon after. It is a one-seeded drupe 2.5–5 cm long, faintly five-angled, yellow to orange-brown when ripe according to PROTA, and blackish brown and deeply wrinkled once dried, as the Flora of China puts it. A single tree yields up to about 10 kg of fruit a year.

In the wild the tree grows in mixed deciduous and drier forests up to about 1,500 m, sometimes 2,000 m, on clay or sandy soils. PROTA describes it as light-demanding, fairly tolerant of frost and drought, and able to recover from fire and coppicing, but notes that natural regeneration is usually poor, perhaps because people collect the fruit and animals eat it, and that the seeds germinate poorly. Fruits are gathered from the time they turn yellow until fully ripe and are then sun-dried. The trade recognizes two main kinds: large mature fruits, used in most Ayurvedic preparations, and small, black, immature, stoneless fruits called jangi haritaki, which Ratha and Joshi identify with the purgative “Chetaki” variety of the classical texts. Chemically, the dried pulp averages about 30% tannin, ranging from under 20% to over 40% depending on origin (PROTA). These are hydrolysable tannins, chiefly chebulagic acid, chebulinic acid, and corilagin, which break down to chebulic, ellagic, and gallic acids. A 2024 review by Wang and colleagues (Molecules) counts at least 149 compounds, including 60 tannins, and notes that sun-drying converts much of the chebulagic and chebulinic acid into these simpler acids.

Ratha and Joshi, writing for India’s Central Council for Research in Ayurvedic Sciences, describe haritaki as the “King of Medicines,” always listed first in Ayurveda and found in all the classical texts and the later lexicons called Nighantus. Those lexicons describe seven varieties, named Vijaya, Rohini, Putana, Amrita, Abhaya, Jivanti, and Chetaki, with Amrita and Chetaki singled out for purging. A review by Bulbul and colleagues (Heliyon 2022) explains the name as either the fruit that carries away disease or the fruit sacred to Shiva (Hara). Mohanty and colleagues (International Journal of Research in Ayurveda and Pharmacy 2022) explain the classical phrase “haritaki pathyanam,” which ranks it among the most wholesome of remedies, and note that Ayurveda calls it Mata, the mother, which cares for a person in a mother’s absence. Their review also describes “Ritu Haritaki,” a seasonal regimen of 2–4 g of powder taken with rock salt, sugar, dry ginger, long pepper, honey, or jaggery depending on the season. Triphala itself goes back to the Charaka and Sushruta Samhitas: Peterson and colleagues (Journal of Alternative and Complementary Medicine 2017) relate Charaka’s claim that triphala taken daily with honey and ghee could let a person live a hundred years, and Sushruta’s use of it for ulcers and wounds.

The fruit traveled with Buddhism and trade. Himalayan Art Resources describes a 16th-century Tibetan painting of the Medicine Buddha holding in his right hand a myrobalan fruit (Terminalia chebula, Sanskrit haritaki), and Wang and colleagues call it the king of Tibetan medicines. In China, the 2024 review traces the fruit, as hezi, to a botanical text of the Western Jin dynasty (266–317 AD); a Tang-dynasty materia medica records imports from India, and Song-dynasty writers named Guangzhou as the source of the best small fruits. There the emphasis is the opposite of Ayurveda’s: the current Chinese Pharmacopoeia says the fruit astringes the lungs and intestines and prescribes it for chronic diarrhea, persistent dysentery, unrelenting cough, and loss of voice. Persian medicine adopted the three-fruit blend as itrifal, an Arabized form of triphala. Kamali and colleagues (DARU 2012) prepared Itrifal Saghir from equal parts of the three fruits mixed with almond oil and honey, following the formula in Avicenna’s Canon of Medicine, and reviews list haritaki among Unani remedies as well.

To Europeans, myrobalans were long a tanning and dye material first. Sunthankar and Jatkar (Journal of the Indian Institute of Science 1938) called chebulic myrobalans the best known of the Indian tanning materials, sold under grades named for the districts that marketed them, such as “Jubbulpores” and “Bhimlies.” The fruits were exported whole, crushed without their stones, or as extract; the authors note great demand for myrobalan extract in Europe for tanning and dyeing “during war and even afterwards,” and in 1935–36 India exported about 1.5 million hundredweight. The same paper notes their use in writing inks. PROTA explains why: used alone, myrobalan tannin makes a soft, spongy leather, so tanners blended it with wattle or quebracho, but its mix of tannins, sugars, and pulp made it an excellent mordant for calico printing and the Turkish red dyeing process, and with iron salts it gives black dyes and inks. The Flora of China notes the fruit still yields a black cloth dye in Guangdong. In 1981 India produced more than 100,000 tonnes of dried fruit and exported about a fifth of it, including to Europe and the United States, with fruit from Salem considered the best (PROTA).

The central puzzle is how an astringent fruit can be a laxative. Tannins bind proteins, which gives myrobalans their astringency (Wang and colleagues) and makes them useful for tanning hides, and Chinese medicine relies on that astringency to stop diarrhea. Traditional systems resolve this by preparation and ripeness. An Ayurvedic laboratory paper in Ayu (2012) explains that boiled haritaki is classed as sangrahi, binding or water-absorbing, whereas the powder is laxative, and Bulbul and colleagues list the unripe fruit as laxative and the ripe fruit as astringent. Peterson and colleagues report that Ayurveda classifies triphala as a bowel tonic at low doses, a mild laxative at normal doses, and a purgative at high doses. The Chinese Pharmacopoeia uses the ripe fruit to stop diarrhea. Tarasiuk and colleagues describe triphala’s gut effects as bidirectional, noting that in rats with castor-oil-induced diarrhea, triphala extracts slowed overall gut transit, an anti-diarrheal effect, while amla, another triphala fruit, showed laxative and gut-stimulating effects in animal tests.

What actually produces haritaki’s laxative effect is unknown. Reviews list anthraquinones, the class of compounds behind senna and cascara, among the fruit’s minor constituents, but Tarasiuk and colleagues give no amount. Wang and colleagues list sennosides A and B among haritaki’s compounds, yet the paper they cite developed a method for measuring sennosides and gallic acid “in a pharmaceutical dosage form,” so it does not establish that the fruit itself contains meaningful amounts. In mice, haritaki powder and tablets given at 550 mg/kg, a dose scaled from about 10 g in humans, shortened the time taken for a kaolin marker to appear in the feces compared with water, with the powder marginally but not significantly better (Ayu 2012, six mice per group). No study has measured how haritaki affects stool frequency, transit, or water secretion in people, so claims that it works “like senna” or “gently, without dependence” are assumptions rather than findings.

Most other research is laboratory work. Chebulagic acid inhibited both cyclooxygenase (COX) and 5-lipoxygenase, two enzymes of inflammation, in cell studies (Reddy and colleagues 2009, cited by Peterson), and triphala extracts suppressed the inflammatory switch NF-κB in rodent cells and arthritic rats. Gut bacteria convert chebulinic acid and related ellagitannins into urolithins, metabolites with antioxidant activity in the test tube, and Peterson and colleagues suggest that individual differences in gut flora may help explain variable responses. In rats, chebulagic acid reached high blood levels after an oral extract, and chebulinic acid, corilagin, and chebulagic acid had elimination half-lives of about 43, 26, and 20 hours (Wang and colleagues). In mouth bacteria, triphala and haritaki extracts reduced Streptococcus mutans, which causes cavities, but MSKCC notes a laboratory finding that triphala compounds may also activate the enzymes that help bacteria build plaque biofilm. None of these effects has been shown to matter clinically.

Constipation is haritaki’s signature traditional use, but it has never been tested in a large placebo-controlled trial. Saini and Agrawal (Journal of Ayurveda 2022) randomized 80 adults with chronic constipation at the National Institute of Ayurveda in Jaipur to 3–6 g of triphala powder at night with warm water or to a prescribed laxative diet for four weeks; 72 finished. Both groups improved on stool form, straining, and other symptoms, and the diet group did slightly better on weekly bowel movements and colic pain, but the trial was open and had no placebo group. Munshi and colleagues (Journal of Ayurveda and Integrative Medicine 2011) gave 34 patients a powder of psyllium husk, senna extract, and triphala for 14 days, and weekly bowel movements rose from about 10 to 18; with no control group and two proven laxatives in the mix, it says little about triphala. A 50-person placebo-controlled trial of triphala caplets, published in the World Journal of Pharmaceutical Research, reported better constipation quality-of-life scores after four weeks, but its abstract gives no dose or effect sizes. Tarasiuk and colleagues found no trials in irritable bowel syndrome.

Gum health is where triphala has the most trials. Pradeep and colleagues (Journal of Periodontology 2016) randomized 90 people with gingivitis to a placebo, triphala, or chlorhexidine mouthwash twice daily for 60 days; plaque, gum inflammation, and bacterial counts fell more with triphala than placebo and did not differ from chlorhexidine. In a nine-month school study of children aged 8 to 12, plaque fell with 0.6% triphala and 0.1% chlorhexidine rinses but rose with water (Bajaj and Tandon 2011). For haritaki alone, Gupta and colleagues (Phytotherapy Research 2014) found a 10% Terminalia chebula rinse matched 0.12% chlorhexidine over two weeks in 78 patients, both beating saline. AlJameel and Almalki (International Journal of Dental Hygiene 2020) pooled seven randomized trials and concluded that triphala mouthwash had equal clinical efficacy to chlorhexidine, though heterogeneity between trials was very high, and a 2024 meta-analysis of five studies in children found no significant difference between the two. The trials are small, mostly from India, and were not designed to prove equivalence, and MSKCC judges that it is not clear whether triphala is as effective as chlorhexidine.

Other human studies are scattered. In Iran, Kamali and colleagues (DARU 2012) randomized 62 obese people aged 16 to 60 to 10 g a day of Itrifal Saghir or a placebo confection for 12 weeks; the triphala group lost about 4.8 kg more, with no adverse effects or changes in liver and kidney tests, but the result has not been replicated. In a double-blind trial, 90 people with high cholesterol took a guggulu-triphala combination or placebo for three months, and cholesterol, body mass index, and waist size did not differ (Donato and colleagues, Complementary Medicine Research 2021). Small Thai studies in healthy volunteers reported higher counts of certain immune cells and, in an open 20-person safety study, slightly higher HDL cholesterol and lower blood sugar (Phetkate and colleagues 2012 and 2020). For haritaki alone, a single 1 g dose modestly raised heat-pain thresholds in a 12-person crossover trial (Kumar and colleagues 2015), and a branded 250 mg extract taken twice daily for eight weeks reduced facial oiliness and wrinkle severity in healthy women in a placebo-controlled study (Chakkalakal and colleagues, Journal of Clinical Medicine 2023). These are early signals, not established uses.

Most of the research is on triphala rather than haritaki, and results from a combination belong to that combination. Triphala is a formula of equal parts of three dried fruits: haritaki, amla, and bibhitaki. It is sometimes combined further, for example with guggulu resin. MSKCC summarizes the clinical picture plainly: human studies of triphala are limited, gastrointestinal benefits rest on animal data, cholesterol findings are mixed, and mouthwash data suggest an effect on plaque without being definitive. Tarasiuk and colleagues, writing about functional gut disorders, saw “some premises” for trying triphala in constipation-predominant irritable bowel syndrome but called for properly designed trials, while Peterson and colleagues, whose first author was partly funded by the Chopra Foundation, founded by coauthor Deepak Chopra, presented a far more enthusiastic list of laboratory findings. Among the three fruits, haritaki is the one Ayurveda most associates with purging, which is why it is the natural home for this evidence, but no trial has compared the fruits with each other, or haritaki with triphala, in people with constipation.

Traditional use centers on the powdered dried fruit, called churna. In the Jaipur trial, adults took 3–6 g of triphala powder at night after a meal with lukewarm water, and Munshi and colleagues give the same 3–6 g daily as the usual dose of triphala for flatulence and constipation. For haritaki alone, Mohanty and colleagues describe 2–4 g of powder in the seasonal “Ritu Haritaki” regimen, and the authors of the mouse transit study state that the classical single laxative dose is one karsha, about 10 g. Ayurveda prepares haritaki in many other ways: in tablets (vati), in fermented liquids such as Abhayarishta, and in preparations such as Agastya Haritaki and Vyaghri Haritaki Avaleha, a thick herbal jam, which Ratha and Joshi link to the large fruits sold in the market. In Persian medicine, Itrifal Saghir is a confection of the three powdered fruits worked into almond oil and honey; Kamali and colleagues used 5 g twice a day. Because boiling is said to make haritaki more binding than laxative, a decoction and a powder are not interchangeable.

Modern products include capsules and tablets of powder or extract. The Thai safety study used an aqueous triphala extract at 2,500 mg a day, as five 500 mg capsules at bedtime for four weeks; the pain study used two 500 mg capsules of a standardized Terminalia chebula extract; and the skin study used a branded 250 mg extract twice daily. Mouthwashes are made from water extracts or decoctions at very different strengths: 0.6% triphala in the school study, 10% Terminalia chebula in Gupta’s trial, and other concentrations elsewhere, usually rinsed twice daily and spat out. Doses on supplement labels are often much lower than the gram amounts used traditionally, and a capsule of extract and a spoonful of powder may contain very different amounts of tannin. Strength also varies with the fruit itself: PROTA reports tannin content from under 20% to over 40% depending on origin, and drying changes the tannin mix.

Practical points: if you want to try haritaki or triphala for occasional constipation, start with a small dose at night with plenty of water and give fiber and fluids the first chance; psyllium has far stronger evidence. Do not stack it with senna, cascara, aloe, or “cleanse” blends, and check labels, because some Ayurvedic laxative products already combine triphala with senna or psyllium. Stop if you get loose stools or cramps. Choose products that name Terminalia chebula, state the amount of fruit or extract, and publish independent testing for lead, mercury, and arsenic; Saper and colleagues found that three-quarters of the metal-containing Ayurvedic products they bought claimed good manufacturing practices, so that label alone is not enough. Be especially wary of rasa shastra formulas, which deliberately combine herbs with metals, minerals, or gems and had more than twice the rate of metal contamination in that study. If constipation lasts more than a week or two despite these steps, see a doctor rather than taking more.