# Thyme essential oil > Thyme is a warm, herbaceous single oil rich in thymol — a genuine hot oil that needs heavy dilution before any skin contact. Canonical page: https://essential-oils.club/oils/single/thyme Type: Single oil ## At a glance - **Botanical name:** Thymus vulgaris - **Plant part:** Leaves and flowering tops - **Extraction:** Steam-distilled - **Aroma:** Warm, herbaceous, medicinal - **Origin:** Mediterranean - **Blends with:** Rosemary, lemon, oregano, eucalyptus ## Composition (GC-MS research aggregate) Based on 94 GC-MS samples from 22 peer-reviewed papers (2018–2026); Strong evidence base. 94 compounds reported in total. Typical share of the oil (median, with interquartile range): | Compound | Class | Median % | IQR % | Max % | Papers | |---|---|---|---|---|---| | thymol | Oxygenated monoterpene | 37.69 | 26.27–47.11 | 84.01 | 20 | | p-cymene | Monoterpene hydrocarbon | 18.32 | 16.26–20.44 | 54.29 | 17 | | γ-terpinene | Monoterpene hydrocarbon | 7.02 | 3.98–9 | 23.04 | 20 | | carvacrol | Oxygenated monoterpene | 5.23 | 3.08–7.62 | 21.65 | 17 | | linalool | Oxygenated monoterpene | 4 | 2.26–4.71 | 15.4 | 19 | | β-caryophyllene | Sesquiterpene hydrocarbon | 2.08 | 1.82–3.27 | 8.18 | 19 | | α-pinene | Monoterpene hydrocarbon | 1.9 | 0.62–3.1 | 11.5 | 16 | | borneol | Oxygenated monoterpene | 1.9 | 0.91–1.99 | 9.39 | 14 | | myrcene | Monoterpene hydrocarbon | 1.33 | 0.92–1.84 | 2.58 | 16 | | terpinen-4-ol | Oxygenated monoterpene | 1.31 | 0.78–1.85 | 6 | 15 | | 1,8-cineole | Oxygenated monoterpene | 1.35 | 1.11–2.81 | 5.4 | 14 | | α-terpinene | Monoterpene hydrocarbon | 1.2 | 0.45–1.56 | 5.01 | 15 | Chemotypes seen in the samples: thymol (55% of samples), p-cymene (32% of samples), linalool (9% of samples). ## Key constituents - **Thymol** (40-55%) — The dominant compound; gives thyme its warm, sharp, herbaceous character - **Para-cymene** — Supporting aromatic terpene common to thyme oil - **Gamma-terpinene** — Minor supporting terpene ## 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. ## How to use it - **In the diffuser:** 2–3 drops brings a spicy, herbaceous note popular in immune-season blends. - **Around the house:** A frequent ingredient in homemade cleaning-spray recipes. ## Safety - Thyme is a hot oil — undiluted or lightly diluted use can cause noticeable skin irritation, so keep topical use to 1% or less, patch-test, and avoid on children or sensitive skin. - Maximum dermal use: Very low for the thymol/carvacrol types — phenols are strong sensitisers; consider a gentler chemotype for skin. - 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. ## What the research says - 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 (https://doi.org/10.12692/ijb/10.2.105-110) ## Evidence - 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 (https://doi.org/10.1080/10412905.2003.9712103) ## 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. ### 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. ### 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. ## Sources (GC-MS studies) - Antih J, Houdkova M, Urbanova K, Kokoska L. 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)_, 2021. https://europepmc.org/article/PMC/PMC8588168 - Najar B, Pistelli L, Ferri B, Angelini LG, Tavarini S. 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)_, 2021. https://europepmc.org/article/PMC/PMC8398316 - Eghlima G, Aghamir F, Hajizadeh HS, Zarbakhsh S. Role of melatonin in promoting growth attributes, thymol, rosmarinic acid and biochemical properties in Thymus vulgaris L. under water deficiency. _BMC plant biology_, 2025. https://europepmc.org/article/PMC/PMC12060455 - Amani Machiani M, Javanmard A, Ostadi A, Alizadeh K. 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)_, 2023. https://europepmc.org/article/PMC/PMC10097372 - Pokajewicz K, Chodura M, Lezrag HA, Svydenko L, Nabrdalik M, Moliszewska E, Fatmi S, Hudz N, Wieczorek PP. Biological Characterization and Essential Oil Profiles of Eastern European Cultivars of <i>Thymus</i>, <i>Satureja</i>, and <i>Monarda</i>. _Molecules (Basel, Switzerland)_, 2026. https://europepmc.org/article/PMC/PMC12844501 - 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. 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_, 2025. https://europepmc.org/article/PMC/PMC12715512 - Kim JE, Lee JE, Huh MJ, Lee SC, Seo SM, Kwon JH, Park IK. 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_, 2019. https://europepmc.org/article/PMC/PMC6843575 - Kokalj Ladan M, Supé Vide M, Schoss K. Multivariate Characterization of Essential Oils for Their Antibacterial Activity Against <i>Escherichia coli</i>: A Data-Driven Interpretation of Experimental Results. _Molecules (Basel, Switzerland)_, 2026. https://europepmc.org/article/PMC/PMC12844431 - Fonseca LS, das Neves MA, Nakajima M, Damasceno BC, Souza LA, Leite IF, Silva SML, Fook MVL. Thyme Essential Oil Nanoemulsion Stabilized by Chitosan Nanoparticles for Potential Application in Food Preservation. _Polymers_, 2026. https://europepmc.org/article/PMC/PMC13164703 - da Luz Froz MJ, Lins A, Farias RAF, Felix DM, da Silva Zamian EM, Viana EVF, Viana XMB, Hamoy M. Behavioral and electrophysiological evaluation of the anesthetic therapeutic window of thyme essential oil in tambaqui (Colossoma macropomum). _Fish physiology and biochemistry_, 2026. https://europepmc.org/article/PMC/PMC13550082 - 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. 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)_, 2025. https://europepmc.org/article/PMC/PMC12165951 - Fathy HM, Ahmed MN, Goda HA, Moselhy MA. Thyme essential oil potentials as a bactericidal and biofilm-preventive agent against prevalent bacterial pathogens. _Scientific reports_, 2025. https://europepmc.org/article/PMC/PMC12391397 - Yaovi AB, Das A, Behera RN, Azokpota P, Farougou S, Baba-Moussa L, Michels F, Fauconnier ML, Ambatipudi K, Sessou P. Antibacterial activity of Cinnamomum verum and Thymus vulgaris essential oils on multidrug-resistant zoonotic bacteria isolated from dogs in southern Benin. _Access microbiology_, 2025. https://europepmc.org/article/PMC/PMC12451634 - Zaher H, Quílez Del Moral JF, Lemrabet S, González-Coloma A, Bencharki B. GC/MS Analysis, Cytotoxicity, and Antimicrobial Properties of Six Moroccan Essential Oils Traditionally Used for COVID-19 Prevention. _Molecules (Basel, Switzerland)_, 2025. https://europepmc.org/article/PMC/PMC12610821 - Abdulkareem AH, Mukhles Ahmed M, Abed Latef Al-Meani S, Abdulkareem EH. 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_, 2025. https://europepmc.org/article/PMC/PMC12753994 - Lanave G, Catella C, Catalano A, Lucente MS, Pellegrini F, Fracchiolla G, Diakoudi G, Palmisani J, Trombetta CM, Martella V, Camero M. Assessing the virucidal activity of essential oils against feline calicivirus, a non-enveloped virus used as surrogate of norovirus. _Heliyon_, 2024. https://europepmc.org/article/PMC/PMC11070907 - 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. In Vitro Virucidal Activity of Different Essential Oils against Bovine Viral Diarrhea Virus Used as Surrogate of Human Hepatitis C Virus. _Antibiotics (Basel, Switzerland)_, 2024. https://europepmc.org/article/PMC/PMC11201044 - Cozzi L, Vicenza T, Battistini R, Masotti C, Suffredini E, Di Pasquale S, Fauconnier ML, Ercolini C, Serracca L. Effects of Essential Oils and Hydrolates on the Infectivity of Murine Norovirus. _Viruses_, 2023. https://europepmc.org/article/PMC/PMC10055854 - Ebani VV, Pieracci Y, Cagnoli G, Bertelloni F, Munafò C, Nardoni S, Pistelli L, Mancianti F. In Vitro Antimicrobial Activity of Thymus vulgaris, Origanum vulgare, Satureja montana and Their Mixture against Clinical Isolates Responsible for Canine Otitis Externa. _Veterinary sciences_, 2023. https://europepmc.org/article/PMC/PMC9864906 - Ebadollahi A, Naseri B, Abedi Z, Setzer WN. Chemical Profiles and Insecticidal Potential of Essential Oils Isolated from Four Thymus Species against Rhyzopertha dominica (F.). _Plants (Basel, Switzerland)_, 2022. https://europepmc.org/article/PMC/PMC9227810 - …and 2 more on the canonical page. _Educational reference only — not medical advice. Essential oils are not intended to diagnose, treat, cure or prevent any disease._