Hingu (Ferula asafoetida)

Q: What is hing made from?

Hing (asafoetida) is the dried oleogumresin collected from the stems and roots of Ferula plants, mainly Ferula asafoetida, native to Afghanistan and Iran. It is sold as raw resin or as compounded powder blended with a carrier.

TL;DR

Hingu (Ferula asafoetida) is the dried resin of a Ferula plant, used as a spice and in traditional medicine for digestion. Two small trials found asafoetida formulations eased dyspepsia symptoms, and one preliminary PCOS trial reported benefit, but all were tiny and short. Medicinal use should be avoided in pregnancy and young children. Evidence remains too thin for medicinal recommendations.

What it is

Hingu, also spelled hing, and known in English as asafoetida, is a dried oleo-gum-resin obtained from the stems and roots of Ferula plants (family Umbelliferae/Apiaceae), chiefly Ferula asafoetida, which grows in the mountains of Afghanistan and Iran. A milky latex is collected from cuts in the living root and dried into the resin. It has a famously strong, sulfurous, garlicky odor; its resin is roughly 40–64% resin, 25% gum, and 10–17% essential oil, with sulfur compounds and sesquiterpene coumarins among its characteristic constituents (Amalraj & Gopi, 2017).

In Indian cooking, tiny pinches of compounded hing (resin blended with a carrier such as wheat flour or gum arabic) flavor lentils, vegetables, and pickles: a culinary amount far smaller than any medicinal dose.

Traditional use

Asafoetida has been used as a flavoring agent and a folk medicine in many parts of the world for centuries. Traditional uses center on the stomach and digestion: stomachache, flatulence, weak digestion, and intestinal parasites, alongside respiratory uses such as whooping cough, asthma, and bronchitis. Review authors note that its digestive-stimulant actions, via increased saliva, bile flow, and digestive-enzyme activity, are the most commonly studied of its traditional effects. These are historical uses, not proof of efficacy (Amalraj & Gopi, 2017).

What modern research says

Almost all other modern asafoetida research is preclinical: relaxant, antispasmodic, antioxidant, and antimicrobial effects in animals and isolated tissues. The human evidence consists of three small trials, all testing manufactured formulations rather than plain hing.

Randomized pilot trial in functional dyspepsia (2018)

Mala and colleagues (2018) ran a randomized, double-blind, placebo-controlled pilot trial in 43 analyzed participants with moderate-to-severe non-ulcer functional dyspepsia (persistent upper-abdominal discomfort with no ulcer found). The treatment was a proprietary formulation called Asafin: a 250 mg capsule taken twice daily for 30 days, each capsule containing 90±5 mg of asafoetida gum plus fenugreek galactomannan fibre. Compared with placebo, the asafoetida group showed greater improvement in validated dyspepsia symptom and quality-of-life scores, with no adverse events and no concerning laboratory changes (Mala et al., 2018).

Important limitations: the trial was tiny (43 people) and short (30 days); it tested one proprietary combination product, not plain hing. And three of the authors were affiliated with the R&D center of the company that supplied the formulation. The result is encouraging but preliminary: it does not show that culinary hing or generic asafoetida supplements ease indigestion.

Second dyspepsia trial, 14 days (2025)

Das and colleagues (2025) ran a second randomized, double-blind, placebo-controlled trial in 62 people with functional dyspepsia: a food-grade self-emulsifying hydrogel formulation of F. asafoetida oleo-gum resin (ASF) at 250 mg/day for 14 days. The ASF group improved on early satiety, bloating, and heartburn, with shifts in gut microbiota composition, better stool form, faster attention-test reaction times, and better sleep scores than placebo (Das et al., 2025).

Limitations are similar: the trial was small and very short, tested another proprietary formulation, and the lead and senior authors were affiliated with the company (Akay Natural Ingredients) that supplied it: the same manufacturer's research network as the 2018 trial. The cognitive, sleep, and microbiome outcomes were exploratory. This is a signal, not a treatment recommendation.

Preliminary PCOS trial (2024)

A preliminary double-blind randomized trial in 30 women with polycystic ovary syndrome compared 1 g/day of encapsulated asafoetida oleo-gum resin (2 × 500 mg capsules) against a low-dose oral contraceptive, over two 21-day treatment periods with a 7-day rest between them. Twenty-eight women completed the trial. The asafoetida group showed shorter menstrual-cycle intervals, longer maintenance of regular cycles, and a higher incidence of pregnancy at 8-month follow-up than the contraceptive group. The contraceptive group showed raised triglycerides, cholesterol, HDL, and LDL (Dehparvar et al., 2024).

Limitations: tiny (28 analyzed), preliminary by the authors' own description, and pregnancy outcomes were a follow-up measure rather than a primary endpoint: far from a basis for fertility treatment.

Everything else is unproven in people

Beyond these three small trials, clinical overviews state that no robust clinical data support therapeutic use or dosing of asafoetida for any condition (Drugs.com). Traditional claims for respiratory, antiparasitic, and other uses rest on animal and laboratory work only (Amalraj & Gopi, 2017).

Dosage

There is no established therapeutic dose for hing. The two dyspepsia trials used proprietary research formulations: a 250 mg Asafin capsule twice daily (about 180 mg of asafoetida gum per day) for 30 days in 2018 (Mala et al., 2018), and 250 mg/day of a hydrogel formulation (ASF) for 14 days in 2025 (Das et al., 2025): and those regimens apply only to those proprietary formulations, not to hing in general. The PCOS trial used 1 g/day of plain encapsulated oleo-gum resin over two 21-day periods (Dehparvar et al., 2024). None of these are recommendations: all come from small, preliminary trials. Culinary pinches of hing in food are a different matter entirely and have not been studied as medicine.

Safety & contraindications

Children: medicinal asafoetida should not be given to children. A case of severe methemoglobinemia (a dangerous blood disorder) was reported in a 5-week-old infant given asafoetida, and clinical overviews contraindicate medicinal use in children (Amalraj & Gopi, 2017; Drugs.com).
Pregnancy and breastfeeding: avoidance is advised; safety has not been established (Amalraj & Gopi, 2017; Drugs.com).
Large doses: the review notes that large amounts can cause mouth swelling, gastrointestinal upset, anxiety, and headache (Amalraj & Gopi, 2017).
Blood-thinning medicines: asafoetida resin contains coumarin derivatives, so potentiation of anticoagulants (e.g., warfarin) is theoretically possible: no published interaction reports exist and the clinical importance is unknown (Drugs.com).
Culinary vs. medicinal: the tiny amounts used in cooking are generally regarded as food; concentrated resin or supplement capsules are a different exposure and should be treated with more caution.

FAQs

What is hing made from?

Hing (asafoetida) is the dried oleo-gum-resin collected from the stems and roots of Ferula plants, mainly Ferula asafoetida, native to Afghanistan and Iran. It is sold as raw resin or as compounded powder blended with a carrier.

Does hing help digestion?

Traditionally, yes: it is one of the most widely used folk remedies for flatulence and weak digestion. Scientifically, three small trials of manufactured asafoetida formulations have shown benefit (two for functional dyspepsia, one preliminary PCOS trial), so the evidence is preliminary.

Are the dyspepsia trials about the hing in my kitchen?

No. Both dyspepsia trials tested specific proprietary formulations, Asafin capsules in 2018 and a hydrogel formulation (ASF) in 2025, containing measured amounts of asafoetida oleo-gum resin in manufactured delivery systems, not culinary hing, which is usually diluted with flour or gum arabic and used in much smaller amounts.

Can children or pregnant women take hing medicinally?

No: medicinal use should be avoided. A severe blood disorder was reported in an infant given asafoetida, and safety in pregnancy has not been established.

Is hing safe for daily use as a spice?

Culinary amounts used in cooking are regarded as food. Medicinal doses of concentrated resin have not been well studied, so daily supplement use is not established as safe.

Sources

Disclaimer

This article is for informational purposes only and is not medical advice. Medicinal asafoetida has very limited human evidence and should be avoided in children and during pregnancy. If you have a digestive condition, take prescription medicines, are pregnant or breastfeeding, or are considering any supplement, talk to a qualified clinician first.