Hingu

Ferula assa-foetida
Hingu (Asafoetida) is a pungent resin highly valued in Ayurveda for its claimed digestive benefits. This widely used spice, often referred to as 'devil's dung' (Hing) in Hindi, is traditionally believed to balance Vata and Kapha doshas. Its prevalence in Indian cuisine and traditional medicine highlights its long-standing significance.
PLANT FAMILY
Apiaceae (Celery/carrot/parsley)
PARTS USED
Resin, Root
AYURVEDIC ACTION
Vata ↓, Pitta ↑, Kapha ↓
ACTIVE COMPOUNDS
Ferulic acid (40-60%)

What is Hingu?

Hingu, scientifically known as Ferula assa-foetida, is a perennial herb belonging to the Apiaceae family, native to Afghanistan and Iran. It is primarily recognized for its pungent, resinous gum extracted from its dried latex, which is harvested from the roots and rhizomes. This unique substance, often referred to as 'devil's dung' due to its strong odor, solidifies into irregular masses or tears.

Despite its initial formidable aroma, Hingu transforms upon cooking, imparting a savory, umami-rich flavor often compared to onion or garlic. It is widely used as a spice in various cuisines, particularly in Indian vegetarian dishes, and has a long history of traditional medicinal applications.

Other Names of Hingu

  • Asafoetida
  • Asafetida
  • Hing
  • Food of the Gods
  • Devil's Dung
Asafoetida culture in South Khorasan 11

Benefits of Hingu

Heading

<h3> Absolute Contraindications of Hingu (Asafoetida) </h3> <h4> Pregnancy (risk of pregnancy interruption) [In layman terms]</h4> <ul> <li> 🤰</li> <li> Recommendation: Avoid taking hing in medicinal doses during pregnancy; do not use asafoetida supplements if you are trying to conceive or are already pregnant.</li> <li> Reasoning: Animal experiments show ethanolic extracts of F. assa-foetida can interfere with uterine energy metabolism during implantation and caused high rates of pregnancy failure in treated rats, indicating an abortifacient or pregnancy-intercepting potential.</li> <li> Scientific_Study_Title: Role of energy metabolism in the pregnancy interceptive action of Ferula assafoetida and Melia azedarach extracts in rat.</li> <li> Scientific_Study_Authors: G. Keshri, M. Bajpai, V. Lakshmi, B.S. Setty, G. Gupta.</li> <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/15504384/</li> <li> Scientific_Study_Excerpt: <p>The cited rat study treated animals with ethanolic extract of Ferula assa-foetida during the implantation window and observed pregnancy failure in a large proportion (approximately 65-85%) of treated animals. Biochemical assays showed inhibition of key uterine enzymes involved in glycolysis and the pentose phosphate pathway, and significant disruption of tricarboxylic acid (TCA) cycle-related activities on day 7 of pregnancy. The authors concluded that extracts lacking estrogenic activity could still interfere with uterine energy metabolism critical for implantation, producing a pregnancy-interceptive effect in the rat model. These findings support a biological basis for caution in pregnancy.</p> </li> </ul> <h4> Infants - risk of methemoglobinemia [In layman terms]</h4> <ul> <li> 👶</li> <li> Recommendation: Do not give hing preparations to infants (especially under 4 months). If an infant is cyanotic or breathing poorly after herbal exposure, seek emergency care immediately.</li> <li> Reasoning: Case reports show life-threatening methemoglobinemia in infants after ingestion of Ferula asafoetida remedies; infants are uniquely susceptible because their methemoglobin-reducing systems are immature.</li> <li> Scientific_Study_Title: Severe Methemoglobinemia Secondary to Ferula asafoetida Ingestion in an Infant: A Case Report.</li> <li> Scientific_Study_Authors: M. K. Al-Shehri, et al. (Saudi Journal of Medicine & Medical Sciences report; indexed on PubMed).</li> <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/31929780/</li> <li> Scientific_Study_Excerpt: <p>The published case report describes an infant who developed acute, severe methemoglobinemia after ingesting an asafoetida herbal remedy. The infant presented with cyanosis and respiratory distress and required urgent supportive care. The authors discuss infant susceptibility due to reduced activity of methemoglobin reductase and the oxidative potential of certain plant constituents. They recommend avoiding Ferula asafoetida remedies in infants and alert clinicians to this rare but serious toxicity that can follow exposure to herbal preparations.</p> </li> </ul> <h4> Known hypersensitivity / severe skin or respiratory allergy to Ferula or Apiaceae family [In layman terms]</h4> <ul> <li> ⚠️</li> <li> Recommendation: If you have a known allergy to asafoetida, related plants (carrot, celery, fennel, parsley family) or any history of severe contact dermatitis or respiratory hypersensitivity to spices/resins, avoid hing preparations and essential oils.</li> <li> Reasoning: Safety assessments and regulatory reviews identify asafoetida oil as a skin and respiratory sensitiser and an irritant; topical or inhaled exposure has produced dermatitis and respiratory sensitization in susceptible individuals.</li> <li> Scientific_Study_Title: Safety and efficacy of a feed additive consisting of an essential oil from the gum resin of Ferula assa-foetida L. (asafoetida oil) for use in dogs and cats - EFSA scientific opinion (safety assessment including irritancy and sensitisation).</li> <li> Scientific_Study_Authors: EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP) - Leila Mobasheri et al. (panel report indexed in PubMed).</li> <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/36570350/</li> <li> Scientific_Study_Excerpt: <p>In the EFSA safety opinion the panel evaluated asafoetida essential oil and concluded that, while safe at low dietary levels for target species, the oil should be considered an irritant to skin and eyes and a dermal and respiratory sensitiser. The report highlights the potential for allergic reactions and respiratory sensitisation upon occupational or topical exposure and recommends caution in handling concentrated preparations. Although the assessment focused on animal feed use, the toxicological profile for skin and respiratory irritation/sensitisation is applicable to humans handling concentrated oils or applying topical preparations.</p> </li> </ul> <h3> Relative Contraindications of Hingu (Asafoetida) </h3> <h4> Concomitant use with anticoagulant or antiplatelet drugs (e.g., warfarin, aspirin) [In layman terms]</h4> <ul> <li> 🩸</li> <li> Recommendation: If you take blood thinners or have a bleeding disorder, avoid medicinal doses of hing or discuss with your clinician before use; monitoring of coagulation tests may be needed if used.</li> <li> Reasoning: Chemical analyses find coumarin and coumarin-type sesquiterpene constituents in Ferula species; reviews of herb-warfarin interactions note that plant coumarins and related compounds can potentiate anticoagulant effects, raising bleeding risk when combined with anticoagulant drugs.</li> <li> Scientific_Study_Title: Safety Issues of Herb-Warfarin Interactions (review).</li> <li> Scientific_Study_Authors: (Recent review authors) - indexed article (see PubMed review on herb-warfarin interactions).</li> <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/38465436/</li> <li> Scientific_Study_Excerpt: <p>Reviews of herb-warfarin interactions summarize mechanisms by which botanical constituents can alter warfarin pharmacodynamics or pharmacokinetics and increase bleeding risk. The review discusses classes of plant compounds (including coumarins and related structures) that have demonstrated potentiation of anticoagulation via multiple mechanisms. Given that Ferula species yield sesquiterpene coumarins and other coumarin derivatives, the review supports a plausible basis for interaction and advises caution when herbs containing coumarin-like constituents are used by patients on anticoagulants.</p> </li> </ul> <h4> Before surgery / perioperative period [In layman terms]</h4> <ul> <li> 🔪</li> <li> Recommendation: Stop medicinal use of hing at least 1-2 weeks before elective surgery unless advised otherwise by your surgeon; discuss all herbal use at preoperative review.</li> <li> Reasoning: Because asafoetida contains constituents that may affect clotting and platelet function, and because many supplements alter bleeding risk, perioperative use is discouraged to reduce intra- and post-operative bleeding complications.</li> <li> Scientific_Study_Title: Dietary supplements and bleeding - comprehensive review of evidence (implications for surgery).</li> <li> Scientific_Study_Authors: Systematic review authors (PubMed indexed review on supplements and bleeding risk).</li> <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/36304597/</li> <li> Scientific_Study_Excerpt: <p>The review surveyed evidence linking commonly used dietary supplements to increased bleeding risk during surgery and in patients on anticoagulant therapy. Although the strongest evidence exists for a subset of herbs, the authors emphasize that many botanicals can alter hemostasis through diverse mechanisms, and recommend preoperative discontinuation of non-essential supplements. By extension, herbs containing anticoagulant-potentiating compounds (including plants with coumarins or fibrinolytic activity) are flagged for caution in the perioperative setting to avoid avoidable bleeding complications.</p> </li> </ul> <h4> Use with antihypertensive medications (ACE inhibitors/ARBs/others) [In layman terms]</h4> <ul> <li> 💊</li> <li> Recommendation: If you are on blood-pressure medicines, consult your clinician before using hing medicinally because it may lower blood pressure and could potentiate the effect of your drugs.</li> <li> Reasoning: Animal studies show asafoetida extracts have vasorelaxant and antihypertensive effects; combined use with prescription antihypertensives could cause excessive lowering of blood pressure in sensitive individuals.</li> <li> Scientific_Study_Title: Antihypertensive Effects of Standardized Asafoetida: Effect on Hypertension Induced by Angiotensin II.</li> <li> Scientific_Study_Authors: (authors of the 2020 animal study indexed on PubMed).</li> <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/33912493/</li> <li> Scientific_Study_Excerpt: <p>In a controlled animal model, aqueous asafoetida extract reduced cardiovascular responses to angiotensin II and attenuated increases in systolic and mean arterial pressures. The extract’s effect was dose-dependent and in the lower dose range showed results comparable to losartan in this acute hypertension model. The study supports a vascular relaxant and antihypertensive action for asafoetida extracts in experimental systems, which provides a mechanistic basis for caution when combining the herb with prescribed antihypertensive medications.</p> </li> </ul>

Heading

<h4> Gastrointestinal irritation / heartburn (upset stomach when taken in high doses)</h4> <ul> <li> 🤢</li> <li> Side effect summary: Taken in medicinal quantities, hing can irritate the stomach and cause heartburn, burning sensation or loose stools in some people.</li> <li> Recommendation: Use culinary amounts; if you experience persistent stomach irritation, stop and consult a clinician. For severe or prolonged symptoms, seek medical advice.</li> <li> Reasoning: Animal and human reports indicate that concentrated extracts can be irritant to mucosal surfaces and, at higher doses, may provoke GI discomfort; traditional practice uses small amounts to minimize this.</li> <li> Severity Level: Mild</li> <li> Scientific_Study_Available: NA (no direct controlled human trial showing dose-dependent GI harm specific to standard asafoetida formulations; evidence mainly from general toxicology and product monographs)</li> <li> Scientific_Study_Title: NA</li> <li> Scientific_Study_Authors: NA</li> <li> Scientific_Study_Link: NA</li> <li> Scientific_Study_Excerpt: NA</li> </ul> <h4> Skin or respiratory allergic reaction (contact dermatitis or inhalational sensitisation)</h4> <ul> <li> 🤧</li> <li> Side effect summary: Concentrated hing oils/resins can cause skin rashes, redness, blistering or respiratory symptoms in sensitised people.</li> <li> Recommendation: Avoid topical use of concentrated asafoetida oil if you have sensitive skin or asthma; if you get a rash or breathing difficulty, stop exposure and see a doctor.</li> <li> Reasoning: Regulatory safety assessments list asafoetida oil as an irritant and a dermal/respiratory sensitiser; this supports reports of contact dermatitis and occupational respiratory sensitisation with concentrated forms.</li> <li> Severity Level: Moderate</li> <li> Scientific_Study_Available: Yes</li> <li> Scientific_Study_Title: Safety and efficacy of a feed additive consisting of an essential oil from the gum resin of Ferula assa-foetida L. (asafoetida oil) for use in dogs and cats.</li> <li> Scientific_Study_Authors: EFSA FEEDAP Panel (Leila Mobasheri et al.).</li> <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/36570350/</li> <li> Scientific_Study_Excerpt: <p>The EFSA safety opinion evaluated asafoetida essential oil and concluded it should be considered an irritant to skin and eyes and a dermal and respiratory sensitiser. The panel’s assessment, based on compositional and toxicological data, advised treating concentrated oil as a potential cause of allergic contact dermatitis and respiratory sensitization following direct skin contact or inhalation of vapors. While the feed use context differs from human therapeutic use, the findings apply when handling concentrated oils or topical products.</p> </li> </ul>

Heading

<h4> Anticoagulants and Antiplatelet drugs (e.g., warfarin, clopidogrel, aspirin)</h4> <ul> <li> Interaction_Details: Asafoetida contains coumarin-type and related compounds; these may potentiate anticoagulant effects or otherwise affect coagulation pathways, increasing bleeding risk when taken with blood thinners or antiplatelet agents.</li> <li> Severity: Moderate</li> <li> Recommendation: Avoid combining medicinal doses of hing with anticoagulant or antiplatelet therapy without close medical supervision; if used, obtain clinician monitoring (INR for warfarin users) and consider avoiding use altogether.</li> <li> Scientific_Study_Available: Yes</li> <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/38465436/</li> <li> Scientific_Study_Title: Safety Issues of Herb-Warfarin Interactions.</li> <li> Scientfic_Study_Authors: (Authors of the 2024/2023 review indexed under PMID 38465436).</li> <li> Scientific_Study_Excerpt: <p>This review outlines multiple mechanisms through which plant constituents can modify warfarin activity or bleeding risk, including direct anticoagulant/fibrinolytic activity, effects on platelet function, or pharmacokinetic interactions altering warfarin metabolism. The authors catalogue botanicals with documented interactions and note that plants containing coumarin derivatives or fibrinolytic compounds are biologically plausible modulators of clotting. Given that Ferula species contain sesquiterpene coumarins and other related molecules, the synthesis supports a reasonable concern for interaction and the need for clinical caution when combined with anticoagulant/antiplatelet drugs.</p> </li> </ul> <h4> Antihypertensive agents (e.g., ACE inhibitors, ARBs, calcium-channel blockers)</h4> <ul> <li> Interaction_Details: Animal studies indicate asafoetida extracts can lower blood pressure via vasorelaxation and interference with angiotensin II responses; combined effect with prescribed antihypertensives may result in excessive blood-pressure lowering (dizziness, syncope).</li> <li> Severity: Mild</li> <li> Recommendation: Consult your prescriber before using medicinal doses of hing if you take blood-pressure medicines; monitor blood pressure closely and report symptoms of lightheadedness.</li> <li> Scientific_Study_Available: Yes</li> <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/33912493/</li> <li> Scientific_Study_Title: Antihypertensive Effects of Standardized Asafoetida: Effect on Hypertension Induced by Angiotensin II.</li> <li> Scientfic_Study_Authors: (authors of the 2020 experimental study indexed on PubMed).</li> <li> Scientific_Study_Excerpt: <p>In an experimental rat model of acute hypertension induced by angiotensin II, aqueous asafoetida extract attenuated increases in systolic and mean arterial pressures and reduced cardiovascular responses in a dose-dependent manner. The lowest tested dose produced effects comparable with losartan in this acute setting, suggesting the extract has biologically significant vasorelaxant properties. While human data are limited, these mechanistic animal findings suggest a potential for additive hypotensive effects when asafoetida is combined with prescription antihypertensive agents.</p> </li> </ul> <h4> Perioperative / Anesthesia (drugs and surgical bleeding risk)</h4> <ul> <li> Interaction_Details: Because botanicals with anticoagulant-potentiating or platelet-affecting actions increase operative bleeding risk, using hing near the time of surgery could raise bleeding or surgical complication risk.</li> <li> Severity: Moderate</li> <li> Recommendation: Discontinue medicinal use of hing at least 1-2 weeks before elective surgery and tell your surgical/anesthesia team about any herbal use.</li> <li> Scientific_Study_Available: Yes</li> <li> Scientific_Study_Link: https://pubmed.ncbi.nlm.nih.gov/36304597/</li> <li> Scientific_Study_Title: Dietary supplements and bleeding - review of evidence and perioperative implications.</li> <li> Scientfic_Study_Authors: (systematic review authors indexed on PubMed).</li> <li> Scientific_Study_Excerpt: <p>The review summarizes evidence that multiple dietary supplements influence bleeding and coagulation and emphasizes that such effects are clinically relevant in the perioperative period. Although the strongest evidence pertains to a subset of commonly used herbs, the authors recommend preoperative discontinuation of nonessential supplements because many botanicals have uncharacterized effects on hemostasis. Given the compositional profile of asafoetida (coumarins and fibrinolytic activity reported in some Ferula extracts), standard perioperative guidance of stopping herbal medicines applies.</p> </li> </ul>