Age Ayurveda Nighantu

Yavani

Trachyspermum ammi (L.) Sprague

Yavani (Trachyspermum ammi (L.) Sprague) is a plant used in Ayurveda, from the Apiaceae (Umbelliferae) family. Not in specific WHO monographs for Trachyspermum ammi; thymol (active constituent) is recognized in pharmacopeias globally; included in Ayurvedic Pharmacopoeia of India and Indian Pharmacopoeia.

Key facts
Botanical nameTrachyspermum ammi (L.) Sprague
FamilyApiaceae (Umbelliferae) · other entries in this family
OrderApiales
Pharmacopoeia statusNot in specific WHO monographs for Trachyspermum ammi; thymol (active constituent) is recognized in pharmacopeias globally; included in Ayurvedic Pharmacopoeia of India and Indian Pharmacopoeia
Taxon identifiersGBIF 3034241 · Wikidata Q413254 · NCBI Taxonomy 52570

Names and identification

LanguageName
EnglishYavani
Latin/BotanicalTrachyspermum ammi (L.) Sprague

Key Phytochemical Constituents

  • Thymol (major active, 35-60% of essential oil)
  • Carvacrol
  • Gamma-terpinene
  • Para-cymene
  • Alpha-pinene and beta-pinene
  • Dietary fiber, protein, and mineral matter

How does it work?

  • Antimicrobial activity through thymol-mediated disruption of bacterial cell membrane integrity and inhibition of efflux pumps
  • Antispasmodic and bronchodilatory effect via calcium channel blockade and anticholinergic smooth muscle relaxation
  • Antihypertensive mechanism through thymol-mediated vasodilation and ACE inhibitory activity
  • Digestive stimulation through enhancement of digestive enzyme secretion and bile flow promotion

Which traditional uses are supported by research?

  • Digestive stimulant and carminative (Deepana-Pachana) - strongly validated through enhanced enzyme secretion and antispasmodic activity
  • Anti-flatulence (Anaha-nashaka) - confirmed through antispasmodic and carminative effects reducing bloating and gas
  • Anti-cough and respiratory (Kasa-Shvasa-hara) - validated bronchodilatory and expectorant effects
  • Anti-parasitic and anthelmintic (Krimighna) - confirmed nematicidal and anthelmintic activities of thymol against intestinal parasites

What do recent clinical trials show?

3 further claims previously listed here could not be traced to a published paper and have been removed. An absence here means we could not identify the source, not that no work exists.

Recent safety updates

  • Generally recognized as safe (GRAS) for culinary use; essential oil at high concentration may cause skin and mucosal irritation
  • Excessive consumption may cause photosensitivity, nausea, and headache; thymol in large doses is hepatotoxic; not recommended in large medicinal doses during pregnancy due to uterotonic effects

What is it made of?

Key Active Markers

  • Carvacrol
  • Thymol
  • Gamma-terpinene
  • Para-cymene
  • Alpha-pinene and beta-pinene
  • Dietary fiber

Analytical Methods: HPLC fingerprinting, TLC (identity), LC-MS/MS (marker quantification)

Dosage forms and preparation

Dosage Forms: Churna (seed powder), Kwatha (decoction), Essential oil, Capsule, Tablet, Ark (distillate), Satva (concentrated essence)

Standard Dosage: 1-3 g seed powder twice daily with warm water; 2-5 drops essential oil in warm water; 15-30 mL Ark twice daily

Bioavailability: Thymol (primary active, 35-60% of essential oil) has excellent oral bioavailability (~60-70%) with rapid GI absorption. Undergoes hepatic glucuronidation and sulfation with renal excretion. p-Cymene (precursor/co-constituent) is well absorbed but rapidly metabolized. gamma-Terpinene has moderate bioavailability. Thymol has significant antibacterial activity even at sub-MIC systemic concentrations. Local GI antimicrobial and carminative effects are pharmacologically important independent of systemic absorption.

Optimal Timing: After meals for digestive/carminative action; before meals for appetite stimulation; Ajwain water (Ark) throughout the day for flatulence

Standardized Extract: Essential oil (Ajwain oil) standardized to >40% thymol by GC-FID; seed extract standardized to >3% thymol by HPLC; Satva (thymol crystals): >95% purity

Shelf Life: Whole seeds: 24-36 months; Powder: 12-18 months; Essential oil: 24-36 months; Satva (thymol crystals): 36-48 months; Ark: 12-18 months

Storage: Whole seeds in airtight containers at 15-25 deg C. Essential oil in amber glass, tightly sealed. Thymol crystals in airtight glass containers away from heat (melting point 49-51 deg C). Ark in glass bottles, protected from light.

Marker Compounds: Thymol, p-Cymene, gamma-Terpinene, alpha-Pinene, beta-Pinene, Carvacrol, Terpinen-4-ol, Limonene

Extraction Methods

  • Steam distillation for essential oil (Ajwain oil)
  • Hydrodistillation
  • Hydroethanolic extraction (60-70% ethanol)
  • Supercritical CO2 extraction
  • Aqueous decoction
  • Distillation for Ark preparation

Synergistic Combinations

  • Saindhava Lavana (rock salt) - carminative and digestive synergy (Ajwain + Namak)
  • Haritaki - digestive and laxative combination (Yavanyadi Churna)
  • Hingu (asafoetida) - anti-flatulent synergy
  • Shunthi (ginger) - comprehensive digestive stimulant formula
  • Methi (fenugreek) - gastric and metabolic combination

Published research

Literature indexed in PubMed that concerns this subject, grouped by study type. A paper appearing here is a record of what has been published, not evidence that the subject works, and laboratory or animal results do not transfer to people. Study titles link to PubMed so you can read the source rather than take our word.

Systematic reviews and meta-analyses1

  1. Elkhouly AM, Baldam MY, Al-Touny S and others. 2024. Medicinal Plants Cultivated in Egypt with Antiviral Potential: A Systematic ReviewAlternative therapies in health and medicine. PMID 39110055

Randomised controlled trials2

  1. Mahmoudpour Z, Shokri J, Kamalinejad M and others. 2019. The efficacy of a Persian herbal formulation on functional bloating: A double-blind randomized controlled trialJournal of integrative medicine. PMID 31201146 · doi:10.1016/j.joim.2019.05.007
  2. Petramfar P, Moein M, Samani SM and others. 2016. Trachyspermum ammi 10 % topical cream versus placebo on neuropathic pain, a randomized, double-blind, placebo-controlled trialNeurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology. PMID 27166709 · doi:10.1007/s10072-016-2600-3

Other clinical studies and reviews4

  1. Prakash R, Gupta N, Sharma N and others. 2026. Biomedical and industrial applications of Trachyspermum ammi-derived nanoparticles: a comprehensive reviewDiscover nano. PMID 41547697 · doi:10.1186/s11671-026-04436-6
  2. Dontje AEWK, Schuiling-Veninga CCM, van Hunsel FPAM and others. 2024. The Therapeutic Potential of Essential Oils in Managing Inflammatory Skin Conditions: A Scoping ReviewPharmaceuticals (Basel, Switzerland). PMID 38794141 · doi:10.3390/ph17050571
  3. Perera WPRT, Liyanage JA, Dissanayake KGC and others. 2021. Antiviral Potential of Selected Medicinal Herbs and Their Isolated Natural ProductsBioMed research international. PMID 34926691 · doi:10.1155/2021/7872406
  4. Rameshk M, Kalantari-Khandani S. 2021. Efficacy of Six Plants of Apiaceae Family for Body Weight Management: A Review from the Perspective of Modern and Traditional Persian MedicineCurrent drug discovery technologies. PMID 33023434 · doi:10.2174/1570163817999201006192538

Laboratory and animal studies5

  1. Sharma H, Yang H, Sharma N and others. 2023. Trachyspermum ammi Bioactives Promote Neuroprotection by Inhibiting Acetylcholinesterase, Aβ-Oligomerization/Fibrilization, and Mitigating Oxidative Stress In VitroAntioxidants (Basel, Switzerland). PMID 38275629 · doi:10.3390/antiox13010009
  2. Haq Z, Ahmad SM, Bashir I and others. 2022. Pathogenesis-Related Gene Expression in Response to Trachyspermum ammi Supplementation Along With Probiotics in Chicken Salmonellosis and Insights in Drug TherapeuticsFrontiers in veterinary science. PMID 35720847 · doi:10.3389/fvets.2022.866614
  3. Selvaraj K, Katare DP, Chand S and others. 2021. Trachyspermum ammi and Cinnamomum verum as nutraceuticals: Spices rich in therapeutically significant protein tyrosine phosphatasesJournal of food biochemistry. PMID 33954990 · doi:10.1111/jfbc.13750
  4. Nomani M, Tohidfar M. 2021. Plant regeneration and transformation of Trachyspermum ammi using Agrobacterium tumefaciens and zygotic embryosJournal, genetic engineering & biotechnology. PMID 33974146 · doi:10.1186/s43141-021-00173-8
  5. Aslam A, Nokhala A, Peerzada S and others. 2020. Evaluation and Comparison of Trachyspermum ammi Seed Extract for Its Anti-inflammatory EffectJournal of pharmacy & bioallied sciences. PMID 33828377 · doi:10.4103/jpbs.JPBS_243_19

Consult a qualified vaidya before acting on anything here. Ayurvedic practice is prescribed to a person, not to a condition: the same dravya is given, withheld or substituted depending on your constitution, your agni, the season and what else you are already taking. A page cannot know any of that. Self-prescribing from a reference is how the wrong preparation, the wrong dose or the wrong anupana gets used.

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