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Ayurveda

CuminCuminum cyminum

Cumin seed, a classic Ayurvedic digestive. In a 50-person IBS case series with no placebo, severe bloating fell from 54% to 0% over 4 weeks.

Botanical name
Cuminum cyminum
Part used
seed (the dried fruit)
Also called
Sanskrit Jiraka (Jeeraka); Hindi Jeera, Zeera; White cumin, Zireh-sabz (Persian)
Used in
Ayurveda
Taken for
Indigestion, Gas, Bloating, Cramping and pain, Loose stools and diarrhea
Sold as
whole seed, ground, tea, capsules, essential oil

What cumin is

Cumin is the small, ridged, yellow-brown seed of Cuminum cyminum, an annual herb of the carrot family (Apiaceae). It is one of the most widely used spices in the world, from Latin America and North Africa through Asia, and the same seed appears in Ayurveda, in Iranian traditional medicine (where the plant is called zireh-sabz) and in everyday cooking. Do not confuse it with black cumin (Nigella sativa) or with shah jeera or Persian cumin (Bunium persicum), which are different plants sold under similar names.

For the gut it is taken as whole or ground seed, as a seed water or tea (jeera water), as a capsule of seed powder or hydroalcoholic extract, and as essential-oil drops. The two human gut studies below used a cumin oral drop containing 2% essential oil and a 250 mg extract capsule, which are not the same as the seed used in cooking.

What the traditions use it for

Ayurveda (about Ayurveda)

An Ayurvedic college monograph describes jiraka as pungent and bitter in taste (rasa), light and dry in its qualities (guna), heating in potency (virya) and pungent in its after-digestion effect (vipaka), and gives it the special action (prabhava) of kindling digestion (deepana). The tradition says it balances kapha and vata and can aggravate pitta in excess. Charaka lists it among the deepaniya (digestion-stimulating) and shoolaprashamana (pain-relieving) drugs, Vagbhata among the deepaniya, and the Bhavaprakasha places it in the Haritakyadi group.

The monograph lists indigestion, diarrhea and flatulence as uses, jeera water for indigestion, and an oil for abdominal massage in colic. Classical formulas that contain it include Jeerakarishta, a digestive tonic, and Hingvastak Churna, a carminative powder. Outside Ayurveda, a review from Tehran states that Iranian traditional medicine used cumin seed for gut, gynecological and respiratory complaints and for diarrhea, and recorded it as stimulant, carminative and astringent.

The constituents

Cumin’s essential oil is dominated by cuminaldehyde, the compound that gives the seed its smell, with gamma-terpinene, beta-pinene, cymene and thymol among the other components a 2017 review lists. A 2024 study reports antidiarrheal and antispasmodic effects of cuminaldehyde in animals, in isolated tissue and in computer models. A 2011 laboratory study found white cumin reduced growth of the gut protozoan Blastocystis hominis in a dish. Both are non-human findings, and amounts used in them cannot be compared with doses taken as food or supplement.

The human evidence

The IBS study usually cited is a 2013 pre-post case series from an academic GI clinic in Iran, not a placebo-controlled trial. Adults with Rome II irritable bowel syndrome took a cumin oral drop containing 2% essential oil, 10 drops twice a day in warm water after meals, for 4 weeks. The abstract says 57 patients were enrolled; the results analyze 50 (26 with diarrhea-predominant and 24 with constipation-predominant IBS). Severe abdominal pain fell from 28% to 0% and moderate from 44% to 22% (p less than 0.001); severe bloating fell from 54% to 0% and moderate from 46% to 8%; incomplete evacuation from 86% to 14%, urgency from 92% to 8%, and mucus in the stool from 76% to 0%. Four weeks after stopping, incomplete evacuation was back to 74%, urgency to 70% and mucus to 52%. Five people withdrew, two for severe nausea and one for severe abdominal pain.

A 2024 triple-blind randomized trial tested a 250 mg hydroalcoholic cumin extract capsule, two doses an hour apart starting 4 hours after abdominal surgery, against corn-starch placebo in 74 patients. Time to first gas was 9.03 versus 11.72 hours (p = 0.004) and to first bowel movement 16.97 versus 26 hours (p less than 0.001), with fewer patients reporting pain, bloating and nausea at several time points. That is post-surgical gut recovery, not IBS.

We could not find a placebo-controlled trial of cumin oil for irritable bowel syndrome or dyspepsia.

StudyDoseWhat it found
Pre-post case series, 50 analyzed adults with IBS (26 diarrhea-predominant, 24 constipation-predominant); no placebo PMID 24829694Cumin oral drop with 2% essential oil, 10 drops twice daily, 4 weeksSevere bloating 54% to 0%; severe abdominal pain 28% to 0%; urgency 92% to 8%; symptoms largely returned 4 weeks after stopping
Triple-blind randomized trial, 74 patients after abdominal surgery PMID 38965524250 mg hydroalcoholic extract, two doses one hour apartFirst gas 9.03 vs 11.72 hours (p = 0.004); first defecation 16.97 vs 26 hours (p < 0.001)
Animal, isolated-tissue and computer-model study of cuminaldehyde, the main compound of the oil PMID 38287835Not stated in the abstract (non-human models)Antidiarrheal and antispasmodic effects reported in experimental animals; no human data

Doses, in trials and in practice

The 2013 IBS series used 20 drops a day of a 2% essential-oil preparation for 4 weeks, split into two doses. The 2024 surgery trial used 250 mg of extract in two doses an hour apart on one day.

Ayurvedic college monographs give traditional amounts of 1 to 3 g of seed powder a day and 1 to 5 drops of oil. The trial preparations and the culinary seed differ in strength, so one cannot stand in for another.

The amounts above are what trials and pharmacopoeias record, not a dose for you; your medicines and conditions change the answer, and a clinician or pharmacist who knows them is the person to ask.

What is known about safety

In the 2013 IBS series, five of the people withdrew, two for severe nausea, one for severe abdominal pain and two for inadequate relief, and some patients reported nausea, abdominal pain and dizziness; the authors called for specific adverse-effect studies. The 2024 surgery paper does not report adverse-event data for its own participants. We found no pregnancy or breastfeeding data in the sources we read. As a food spice cumin is widely eaten, but concentrated oil and extract are a different exposure.

Where it meets prescription medicines

We did not find an interaction study of cumin in people. Reviews describe antidiabetic activity from cumin in laboratory work, so an additive effect with glucose-lowering medicines is a theoretical question, not a documented one. The 2024 surgery trial was run in patients receiving postoperative care, but its report describes no medicine interactions.

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Herbs that sit beside it

Ayurvedic Coriander Coriandrum sativum Ayurvedic Asafoetida Ferula assa-foetida (also written Ferula asafoetida) Ayurvedic / TCM / Western Fennel Foeniculum vulgare Ayurvedic / Western Caraway Carum carvi Ayurvedic Ajwain Trachyspermum ammi (also written Carum copticum)

Questions people ask

Did a trial show cumin works for irritable bowel syndrome?

The 2013 study was a case series without a placebo group. Among 50 people analyzed, severe bloating fell from 54% to 0% and urgency from 92% to 8% over 4 weeks, but symptoms largely returned 4 weeks after stopping. Without a placebo group, the changes cannot be attributed to cumin.

Is the cumin in the studies the same as the spice in my cupboard?

No. The IBS study used drops containing 2% essential oil and the surgery trial used a 250 mg extract capsule. Neither tested ground seed from the spice rack.

Is black cumin the same thing?

No. Black cumin is Nigella sativa, and shah jeera or Persian cumin is Bunium persicum. Cumin is Cuminum cyminum, and the sources here refer only to it.

What does Ayurveda say about cumin?

College monographs call jiraka pungent, bitter, light, dry and heating, and say it kindles digestion and balances kapha and vata. It appears in classical digestive formulas. These are the tradition’s statements.

What did the surgery trial measure?

How fast bowel function returned after abdominal surgery in 74 patients. First gas came about 2.7 hours earlier and first bowel movement about 9 hours earlier with the extract than with placebo, but this is a post-surgery setting, not everyday digestion.

Sources