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Limited evidenceGut health

Asafoetida (Hing)

A pungent resin used as a digestive spice. Two small old trials pooled positively for IBS, but they used homeopathic-style dilutions and Cochrane rated that same evidence very low certainty.

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What the science says

  • Pooled benefit in IBS with constipation Limited evidence

    A systematic review and meta-analysis of Western herbal medicines in IBS named asafoetida one of only three preparations with replicated positive results: global symptom improvement in 73% of 63 asafoetida participants versus 45% of 66 on placebo at two weeks.

  • The same trials are rated very low certainty Limited evidence

    The Cochrane review of homeopathy for IBS classified those asafoetida studies as clinical homeopathy, judged their risk of bias unclear to high, and rated the evidence very low certainty. The asafoetida-plus-nux-vomica arm was not significantly better than placebo.

  • A modern trial in functional dyspepsia Limited evidence

    A 2025 randomized, double-blind, placebo-controlled trial of Ferula asafoetida oleo-gum resin reported improvement in dyspepsia symptoms with accompanying microbiome changes. It is a single trial awaiting replication.

Dosage & safety

Studied doseCulinary use is a pinch (roughly 250 mg) added to food. Standardised oleo-gum resin extracts are typically dosed at 200–250 mg twice daily.
SafetyCan cause gas, diarrhoea and headache. Reported to lower blood pressure and affect clotting, so use caution with anticoagulants and stop before surgery. Avoid in pregnancy, and never give it to infants — asafoetida has been linked to methaemoglobinaemia in babies.

How to take it

TimingWith meals for the digestive use.
With food?With food; raw resin on an empty stomach causes gas and headache.
Worth knowingCooking a pinch briefly in hot fat before adding other ingredients is what mellows the sulphurous smell — and never give it to an infant.

Interactions

With medications

  • warfarin and other anticoagulants or antiplatelets

    Asafoetida is reported to affect clotting, adding to bleeding risk. avoid combining, and stop at least 2 weeks before surgery

  • antihypertensives

    Additive blood-pressure lowering. monitor your readings when starting

With other supplements

  • fish oil, garlic, ginkgo and other blood-thinning supplements

    Compounded effect on clotting. do not stack them

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

Frequently asked questions

Does asafoetida help IBS?

Asafoetida has limited evidence for IBS: pooled small trials reported global improvement in 73% of asafoetida participants versus 45% on placebo, but Cochrane classified those studies as homeopathy and rated the evidence very low certainty. A 2025 trial in functional dyspepsia was positive but awaits replication.

How much asafoetida should I take?

Culinary use of asafoetida is a pinch (roughly 250 mg) added to food; standardised oleo-gum resin extracts are typically dosed at 200–250 mg twice daily with meals. Raw resin on an empty stomach causes gas and headache.

Is asafoetida safe for babies?

Never give asafoetida to infants: it has been linked to methaemoglobinaemia in babies. Asafoetida should also be avoided in pregnancy.

Does asafoetida interact with blood thinners?

Asafoetida is reported to affect clotting and lower blood pressure, so avoid combining it with anticoagulants, antiplatelets or blood-thinning supplements, and stop at least 2 weeks before surgery. Monitor your blood pressure if you take antihypertensives.

Scientific references

Related in Gut health

Herbal medicines: what the evidence says (335)