Thyme (Thymus vulgaris)
Thyme is a warm, herbaceous single oil rich in thymol — a genuine hot oil that needs heavy dilution before any skin contact.
How to use it
2–3 drops brings a spicy, herbaceous note popular in immune-season blends.
A frequent ingredient in homemade cleaning-spray recipes.
Safety in detail
- Max dermal use
- Very low for the thymol/carvacrol types — phenols are strong sensitisers; consider a gentler chemotype for skin
- Phototoxic
- No
- The common thymol (and carvacrol) chemotypes are strong skin and mucous-membrane irritants — dilute heavily, never apply neat, and patch-test.
- For skin use, the linalool or thujanol chemotypes are far gentler choices.
- Not phototoxic. Keep out of reach of children.
Sources: Bounatirou et al. (2003), Journal of Essential Oil Research
Composition & chemistry
Aggregated from 94 GC-MS samples across 22 peer-reviewed open-access studies (2018–2026). Figures are the distribution across those samples — median with interquartile range — not a single reading.
- Oxygenated monoterpene 62.1%
- Monoterpene hydrocarbon 33.6%
- Sesquiterpene hydrocarbon 2.6%
- Unclassified 1%
- Oxygenated sesquiterpene 0.7%
| Constituent | Median | Typical range | Max | Detected in |
|---|---|---|---|---|
| thymol ↗ C10H14O | 37.7% | 26.3–47.1% | 84.0% | |
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| p-cymene ↗ C10H14 | 18.3% | 16.3–20.4% | 54.3% | |
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| γ-terpinene ↗ C10H16 | 7.0% | 4.0–9.0% | 23.0% | |
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| carvacrol ↗ C10H14O | 5.2% | 3.1–7.6% | 21.6% | |
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| linalool ↗ C10H18O | 4.0% | 2.3–4.7% | 15.4% | |
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| β-caryophyllene ↗ C15H24 | 2.1% | 1.8–3.3% | 8.2% | |
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| α-pinene ↗ C10H16 | 1.9% | 0.6–3.1% | 11.5% | |
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| borneol ↗ C10H18O | 1.9% | 0.9–2.0% | 9.4% | |
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| 1,8-cineole ↗ C10H18O | 1.4% | 1.1–2.8% | 5.4% | |
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| myrcene ↗ C10H16 | 1.3% | 0.9–1.8% | 2.6% | |
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| terpinen-4-ol ↗ C10H18O | 1.3% | 0.8–1.9% | 6.0% | |
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| α-terpinene ↗ C10H16 | 1.2% | 0.5–1.6% | 5.0% | |
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+ 82 more compounds reported across the dataset.
22 peer-reviewed sources behind these figures
- Antih J, Houdkova M, Urbanova K, Kokoska L. (2021). Antibacterial Activity of Thymus vulgaris L. Essential Oil Vapours and Their GC/MS Analysis Using Solid-Phase Microextraction and Syringe Headspace Sampling Techniques. Molecules (Basel, Switzerland).
- Najar B, Pistelli L, Ferri B, Angelini LG, Tavarini S. (2021). Crop Yield and Essential Oil Composition of Two Thymus vulgaris Chemotypes along Three Years of Organic Cultivation in a Hilly Area of Central Italy. Molecules (Basel, Switzerland).
- Eghlima G, Aghamir F, Hajizadeh HS, Zarbakhsh S. (2025). Role of melatonin in promoting growth attributes, thymol, rosmarinic acid and biochemical properties in Thymus vulgaris L. under water deficiency. BMC plant biology.
- Amani Machiani M, Javanmard A, Ostadi A, Alizadeh K. (2023). Improvement in Essential Oil Quantity and Quality of Thyme (Thymus vulgaris L.) by Integrative Application of Chitosan Nanoparticles and Arbuscular Mycorrhizal Fungi under Water Stress Conditions. Plants (Basel, Switzerland).
- Pokajewicz K, Chodura M, Lezrag HA, Svydenko L, Nabrdalik M, Moliszewska E, Fatmi S, Hudz N, Wieczorek PP. (2026). Biological Characterization and Essential Oil Profiles of Eastern European Cultivars of <i>Thymus</i>, <i>Satureja</i>, and <i>Monarda</i>. Molecules (Basel, Switzerland).
- EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), Villa RE, Azimonti G, Bonos E, Christensen H, Durjava M, Dusemund B, Gehring R, Glandorf B, Kouba M, López-Alonso M, Marcon F, Nebbia C, Pechová A, Prieto-Maradona M, Röhe I, Theodoridou K, Bastos ML, Benfenati E, Brantom P, Chesson A, Schlatter J, Westendorf J, Manini P. (2025). Safety and efficacy of a feed additive consisting of an essential oil obtained from the flowering aerial parts of <i>Thymus vulgaris</i> L. and/or <i>Thymus zygis</i> L. (thyme oil) for use in all animal species (FEFANA asbl). EFSA journal. European Food Safety Authority.
- Kim JE, Lee JE, Huh MJ, Lee SC, Seo SM, Kwon JH, Park IK. (2019). Fumigant Antifungal Activity via Reactive Oxygen Species of Thymus vulgaris and Satureja hortensis Essential Oils and Constituents against Raffaelea quercus-mongolicae and Rhizoctonia solani. Biomolecules.
- Kokalj Ladan M, Supé Vide M, Schoss K. (2026). Multivariate Characterization of Essential Oils for Their Antibacterial Activity Against <i>Escherichia coli</i>: A Data-Driven Interpretation of Experimental Results. Molecules (Basel, Switzerland).
- Fonseca LS, das Neves MA, Nakajima M, Damasceno BC, Souza LA, Leite IF, Silva SML, Fook MVL. (2026). Thyme Essential Oil Nanoemulsion Stabilized by Chitosan Nanoparticles for Potential Application in Food Preservation. Polymers.
- da Luz Froz MJ, Lins A, Farias RAF, Felix DM, da Silva Zamian EM, Viana EVF, Viana XMB, Hamoy M. (2026). Behavioral and electrophysiological evaluation of the anesthetic therapeutic window of thyme essential oil in tambaqui (Colossoma macropomum). Fish physiology and biochemistry.
- Taibi M, Elbouzidi A, Bentouhami NE, Haddou M, Baraich A, Hammouti Y, Belbachir Y, Bellaouchi R, Mothana RA, Hawwal MF, Asehraou A, Karboune S, Addi M, Guerrouj BE, Chaabane K. (2025). Evaluation of the Dermatoprotective Properties of Clinopodium nepeta and Thymus vulgaris Essential Oils: Phytochemical Analysis, Anti-Elastase, Anti-Tyrosinase, Photoprotective Activities, and Antimicrobial Potential Against Dermatopathogenic Strains. Skin research and technology : official journal of International Society for Bioengineering and the Skin (ISBS) [and] International Society for Digital Imaging of Skin (ISDIS) [and] International Society for Skin Imaging (ISSI).
- Fathy HM, Ahmed MN, Goda HA, Moselhy MA. (2025). Thyme essential oil potentials as a bactericidal and biofilm-preventive agent against prevalent bacterial pathogens. Scientific reports.
- Yaovi AB, Das A, Behera RN, Azokpota P, Farougou S, Baba-Moussa L, Michels F, Fauconnier ML, Ambatipudi K, Sessou P. (2025). Antibacterial activity of Cinnamomum verum and Thymus vulgaris essential oils on multidrug-resistant zoonotic bacteria isolated from dogs in southern Benin. Access microbiology.
- Zaher H, Quílez Del Moral JF, Lemrabet S, González-Coloma A, Bencharki B. (2025). GC/MS Analysis, Cytotoxicity, and Antimicrobial Properties of Six Moroccan Essential Oils Traditionally Used for COVID-19 Prevention. Molecules (Basel, Switzerland).
- Abdulkareem AH, Mukhles Ahmed M, Abed Latef Al-Meani S, Abdulkareem EH. (2025). Integrated <i>in silico</i>-<i>in vitro</i> and pharmacokinetic profiling of <i>Thymus vulgaris</i>-derived metabolites targeting multidrug resistance pathways in extensively drug-resistant <i>Acinetobacter baumannii</i> (muks92). Frontiers in microbiology.
- Lanave G, Catella C, Catalano A, Lucente MS, Pellegrini F, Fracchiolla G, Diakoudi G, Palmisani J, Trombetta CM, Martella V, Camero M. (2024). Assessing the virucidal activity of essential oils against feline calicivirus, a non-enveloped virus used as surrogate of norovirus. Heliyon.
- Lanave G, Pellegrini F, Triggiano F, De Giglio O, Lucente MS, Diakoudi G, Catella C, Gentile A, Tardugno R, Fracchiolla G, Martella V, Camero M. (2024). In Vitro Virucidal Activity of Different Essential Oils against Bovine Viral Diarrhea Virus Used as Surrogate of Human Hepatitis C Virus. Antibiotics (Basel, Switzerland).
- Cozzi L, Vicenza T, Battistini R, Masotti C, Suffredini E, Di Pasquale S, Fauconnier ML, Ercolini C, Serracca L. (2023). Effects of Essential Oils and Hydrolates on the Infectivity of Murine Norovirus. Viruses.
- Ebani VV, Pieracci Y, Cagnoli G, Bertelloni F, Munafò C, Nardoni S, Pistelli L, Mancianti F. (2023). In Vitro Antimicrobial Activity of Thymus vulgaris, Origanum vulgare, Satureja montana and Their Mixture against Clinical Isolates Responsible for Canine Otitis Externa. Veterinary sciences.
- Ebadollahi A, Naseri B, Abedi Z, Setzer WN. (2022). Chemical Profiles and Insecticidal Potential of Essential Oils Isolated from Four Thymus Species against Rhyzopertha dominica (F.). Plants (Basel, Switzerland).
- Akermi S, Smaoui S, Fourati M, Elhadef K, Chaari M, Chakchouk Mtibaa A, Mellouli L. (2022). In-Depth Study of Thymus vulgaris Essential Oil: Towards Understanding the Antibacterial Target Mechanism and Toxicological and Pharmacological Aspects. BioMed research international.
- Scalas D, Mandras N, Roana J, Tardugno R, Cuffini AM, Ghisetti V, Ghisetti V, Benvenuti S, Tullio V. (2018). Use of Pinus sylvestris L. (Pinaceae), Origanum vulgare L. (Lamiaceae), and Thymus vulgaris L. (Lamiaceae) essential oils and their main components to enhance itraconazole activity against azole susceptible/not-susceptible Cryptococcus neoformans strains. BMC complementary and alternative medicine.
Every figure above traces to a named table in one of these open-access papers. How this was built →
- Thymol — the dominant phenol in the common chemotype; drives thyme's strong antimicrobial activity in vitro and its skin-irritant potential Kryeziu et al. (2017), International Journal of Biosciences
Chemotypes
- ct. thymol — The common, powerful type — high in phenolic thymol; the harshest on skin.
- ct. carvacrol — Similar strength to thymol type, dominated by carvacrol; equally irritating.
- ct. linalool — A much gentler, linalool-rich type, better suited to sensitive skin.
- ct. thujanol / ct. geraniol — Milder, softer chemotypes prized for gentler applications.
Naturally high in thymol, thyme is a genuine hot oil that needs heavy dilution.
What the research says
An honest read of the published research — what has actually been studied, at what stage. Not medical advice or a promise of results.
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Thyme oil, especially the thymol type, is widely studied for antimicrobial activity in the laboratory. These are in-vitro findings driven by its phenolic content, not clinical evidence it treats infections.
Kryeziu et al. (2017), International Journal of Biosciences
Evidence & sources
Peer-reviewed research on Thyme's chemistry and safety. These describe composition and documented effects — not health or treatment claims.
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The common thyme chemotype is dominated by the phenol thymol, with p-cymene and γ-terpinene next — the source of both its potency and its harshness.
Bounatirou et al. (2003), Journal of Essential Oil Research
Frequently asked questions
Why are there so many kinds of thyme oil?
Thyme grows in distinct chemotypes. The thymol and carvacrol types are powerful and harsh; the linalool, thujanol, and geraniol types are much gentler. Always check which chemotype your bottle is before using it on skin. Bounatirou et al. (2003), Journal of Essential Oil Research
Is thyme oil safe for skin?
The common thymol type is a strong irritant and needs heavy dilution — never neat. If you want thyme for skin, choose the linalool chemotype, which is far gentler. Bounatirou et al. (2003), Journal of Essential Oil Research
Is thyme oil phototoxic?
No — thyme isn't phototoxic. The main precaution is its phenolic content in the thymol/carvacrol types, which calls for careful dilution.
Gallery
Thyme (Thymus vulgaris) is steam-distilled from the herb’s leaves and flowering tops, and is naturally high in thymol — the same compound that gives thyme its sharp, warm, slightly medicinal aroma and its classification as a genuine “hot” oil.
The plant
Thyme is a low, woody Mediterranean shrub, cultivated widely across southern Europe and North Africa for both culinary and aromatic use. It’s one of the oldest documented aromatic herbs, referenced in ancient Egyptian, Greek, and Roman texts for its strong, penetrating scent.
Extraction and aroma
Steam distillation concentrates the plant’s volatile oils into a sharp, warm, herbaceous aroma with a distinctly medicinal edge — noticeably more intense than the fresh or dried herb used in cooking.
In the diffuser
2–3 drops brings a spicy, herbaceous note popular in immune-season blends, and thyme is also a frequent ingredient in homemade cleaning-spray recipes thanks to its sharp, clean character.
On skin
Thyme is considered a hot oil. Undiluted or lightly diluted application can cause noticeable skin irritation, so keep any topical use to 1% or less in a carrier oil, patch-test first, and avoid use on children or sensitive skin — see our allergy and safety guide.
Pairs well with
Rosemary, lemon, oregano, and eucalyptus are common companions, echoing the Mediterranean herb garden thyme comes from.
A note on chemotype
Thyme oil chemistry varies significantly by chemotype (the specific chemical profile a plant develops based on growing conditions) — some thyme oils are thymol-dominant and sharper, while others (like thyme linalool) are gentler and better suited to sensitive skin. Check which chemotype you’re buying if skin sensitivity is a concern.
This single oil is not labeled for ingestion; only the Vitality-line version is intended for internal use per label directions.
Found in these blends
Thyme is one of the oils inside 1 Young Living blend.