# Lemon essential oil > A bright, citrusy single oil cold-pressed from the peel, known for its clean and uplifting aroma. Canonical page: https://essential-oils.club/oils/single/lemon Type: Single oil ## At a glance - **Botanical name:** Citrus limon - **Plant part:** Fruit peel - **Extraction:** Cold-pressed - **Aroma:** Bright, clean citrus - **Origin:** Italy, U.S. - **Blends with:** Peppermint, lavender, rosemary ## Composition (GC-MS research aggregate) Based on 30 GC-MS samples from 18 peer-reviewed papers (2020–2026); Strong evidence base. 78 compounds reported in total. Typical share of the oil (median, with interquartile range): | Compound | Class | Median % | IQR % | Max % | Papers | |---|---|---|---|---|---| | limonene | Monoterpene hydrocarbon | 53.69 | 45.43–60.77 | 73 | 16 | | β-pinene | Monoterpene hydrocarbon | 10.11 | 2.29–13.6 | 21.89 | 16 | | γ-terpinene | Monoterpene hydrocarbon | 9.27 | 5.82–11.11 | 12.85 | 15 | | α-pinene | Monoterpene hydrocarbon | 1.95 | 1.46–2.6 | 3.44 | 14 | | myrcene | Monoterpene hydrocarbon | 1.37 | 0.6–1.57 | 2.54 | 13 | | sabinene | Monoterpene hydrocarbon | 1.81 | 1.34–2.48 | 2.8 | 7 | | geranial | Oxygenated monoterpene | 1.8 | 1.07–2.91 | 9.86 | 7 | | β-bisabolene | Sesquiterpene hydrocarbon | 0.92 | 0.57–1.58 | 19.39 | 12 | | neral | Oxygenated monoterpene | 1.1 | 0.72–1.31 | 10.44 | 9 | | β-caryophyllene | Sesquiterpene hydrocarbon | 0.52 | 0.27–0.85 | 7.76 | 11 | | terpinolene | Monoterpene hydrocarbon | 0.5 | 0.42–0.57 | 0.78 | 11 | | neryl acetate | Oxygenated monoterpene | 0.6 | 0.44–2.78 | 4.95 | 7 | Chemotypes seen in the samples: limonene (77% of samples), hexadecanoic acid (10% of samples), neryl acetate (7% of samples). ## Key constituents - **Limonene** (55-75%) — The dominant compound; gives lemon its bright, characteristic citrus scent and flavor ## How to use it - **In the diffuser:** 3–5 drops alone, or with peppermint, for a fresh, energizing daytime atmosphere. - **On skin:** Phototoxic — if used topically, dilute well and avoid sun exposure for at least 12 hours. - **Around the house:** A favorite in DIY surface sprays for its scent and grease-cutting power. ## Safety - Lemon is phototoxic — if used topically, dilute well and avoid sun or UV exposure for at least 12 hours afterward. - Maximum dermal use: 2% on skin (expressed lemon — phototoxicity). - Phototoxic — avoid UV exposure after topical use. - Cold-pressed lemon is phototoxic (contains coumarins): avoid UV / direct sun for 12–18 hours after topical use. - Dilute in a carrier oil; steam-distilled lemon is not phototoxic if you need a sun-safe option. - Keep out of reach of children. ## What the research says - Lemon inhalation has been tested for nausea — for example a randomized trial in pregnancy — with some benefit reported. Findings are small-scale and preliminary, not a treatment. — Yavari Kia et al. (2014), Iranian Red Crescent Medical Journal (https://doi.org/10.5812/ircmj.14360) ## Evidence - Cold-pressed lemon peel oil is dominated by limonene, with β-pinene and γ-terpinene as the next largest fractions. — Ahmed et al. (2001), Journal of Essential Oil Research (https://doi.org/10.1080/10412905.2001.9699646) - Controlled testing confirms expressed lemon oil is phototoxic on skin later exposed to UV — the basis for diluting it and avoiding sun after topical use. — Naganuma et al. (1985), Archives of Dermatological Research (https://doi.org/10.1007/bf00412492) ## Frequently asked questions ### Is lemon essential oil phototoxic? Cold-pressed (expressed) lemon oil is mildly phototoxic because of natural coumarins. Diluted on skin, avoid UV and direct sun for 12–18 hours — or use a steam-distilled lemon oil, which isn't phototoxic. ### Can I diffuse lemon oil any time? Yes — phototoxicity is only a skin-plus-sunlight concern. Diffusing lemon into the air carries no phototoxic risk. ### Does lemon oil help with nausea? A few small randomized studies (including one in pregnancy) suggest inhaling lemon may ease nausea. It's a low-risk thing to try, not a substitute for medical advice. ## Sources (GC-MS studies) - Tswaai POJ, Augustyn WA, Regnier T, du Plooy W. Identification of Biomarkers Associated with Phyllosticta citricarpa Tolerance. _Molecules (Basel, Switzerland)_, 2024. https://europepmc.org/article/PMC/PMC11313913 - EFSA Panel on Additives and Products or Substances used in Animal Feed (FEEDAP), Bampidis V, Azimonti G, Bastos ML, Christensen H, Kouba M, Fašmon Durjava M, López-Alonso M, López Puente S, Marcon F, Mayo B, Pechová A, Petkova M, Ramos F, Ramos F, Sanz Y, Villa RE, Woutersen R, Brantom P, Chesson A, Westendorf J, Galobart J, Manini P, Pizzo F, Dusemund B. Safety and efficacy of feed additives consisting of expressed lemon oil and its fractions from <i>Citrus limon</i> (L.) Osbeck and of lime oil from <i>Citrus aurantiifolia</i> (Christm.) Swingle for use in all animal species (FEFANA asbl). _EFSA journal. European Food Safety Authority_, 2021. https://europepmc.org/article/PMC/PMC8085978 - Pucci M, Raimondo S, Zichittella C, Tinnirello V, Corleone V, Aiello G, Moschetti M, Moschetti M, Conigliaro A, Fontana S, Alessandro R. Biological Properties of a Citral-Enriched Fraction of Citrus limon Essential Oil. _Foods (Basel, Switzerland)_, 2020. https://europepmc.org/article/PMC/PMC7555671 - Cebollada P, Reigada I, Ylätalo M, Gerediaga C, López V, Hanski L. Limonene and its metabolite perillyl alcohol inhibit Chlamydia trachomatis growth by altering host isoprenoid metabolism. _Natural products and bioprospecting_, 2026. https://europepmc.org/article/PMC/PMC13070884 - Elmaidomy AH, Mohamed EM, El-Dien RTM, Abou-Zied HA, Mostafa AA, Taha RH, El-Badry MA, Abdelmohsen UR, Youssif KA. Chemical composition and insecticidal activity of essential oils from Citrus limon, Citrus aurantium, and Citrus margarita against Musca domestica. _Scientific reports_, 2026. https://europepmc.org/article/PMC/PMC13096227 - Huang J, Xu X, Liu C, Liu L. Exploring the Potential of <i>Lemon</i> Peel Extracts in Cosmetics: Chemical Composition and Bioactive Properties. _Journal of microbiology and biotechnology_, 2025. https://europepmc.org/article/PMC/PMC11985412 - Djerri R, Merniz S, D'Elia M, Aissani N, Khemili A, Abou Mustapha M, Rastrelli L, Himed L. Ultrasound-Enhanced Ionotropic Gelation of Pectin for Lemon Essential Oil Encapsulation: Morphological Characterization and Application in Fresh-Cut Apple Preservation. _Foods (Basel, Switzerland)_, 2025. https://europepmc.org/article/PMC/PMC12154024 - Campos S, Espinoza J, Fuentes JM, Jofré-Fernández I, Tortella G, Navarro D, Quiroz A, Diez MC, Rubilar O, Fincheira P. The Impact of Essential Oils Derived from Citrus Species to Control <i>Botrytis cinerea</i> and Their Potential Physiological Actions. _Plants (Basel, Switzerland)_, 2025. https://europepmc.org/article/PMC/PMC12196830 - Nodola P, Miya GM, Mazwi V, Oriola AO, Oyedeji OO, Hosu YS, Kuria SK, Oyedeji AO. Citrus limon Wastes from Part of the Eastern Cape Province in South Africa: Medicinal, Sustainable Agricultural, and Bio-Resource Potential. _Molecules (Basel, Switzerland)_, 2024. https://europepmc.org/article/PMC/PMC11013870 - 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 - Petretto GL, Mele A, Pintore G, Mannu A. The Impact of Selected Eutectic Solvents on the Volatile Composition of Citrus lemon Essential Oil. _Materials (Basel, Switzerland)_, 2024. https://europepmc.org/article/PMC/PMC11547412 - Yaghoobi MM, Deylami T, Torkzadeh-Mahani M. Apoptotic and anti-migratory activity of <i>Citrus limon</i> rind essential oil encapsulated in niosome against human breast cancer cells. _Avicenna journal of phytomedicine_, 2024. https://europepmc.org/article/PMC/PMC12009618 - Souiy Z, Amri Z, Sharif H, Souiy A, Cheraief I, Hamden K, Hamden K, Hammami M. The Use of D-Optimal Mixture Design in Optimizing Formulation of a Nutraceutical Hard Candy. _International journal of food science_, 2023. https://europepmc.org/article/PMC/PMC10033211 - 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 - Pellegrini F, Camero M, Catella C, Fracchiolla G, Sblano S, Patruno G, Trombetta CM, Galgano M, Pratelli A, Tempesta M, Martella V, Lanave G. Virucidal Activity of Lemon Essential Oil against Feline Calicivirus Used as Surrogate for Norovirus. _Antibiotics (Basel, Switzerland)_, 2023. https://europepmc.org/article/PMC/PMC9952628 - Kunová S, Sendra E, Haščík P, Vukovic NL, Vukic M, Kačániová M. Influence of Essential Oils on the Microbiological Quality of Fish Meat during Storage. _Animals : an open access journal from MDPI_, 2021. https://europepmc.org/article/PMC/PMC8614330 - Senthil Kumar KJ, Gokila Vani M, Wang CS, Chen CC, Chen YC, Lu LP, Huang CH, Lai CS, Wang SY. Geranium and Lemon Essential Oils and Their Active Compounds Downregulate Angiotensin-Converting Enzyme 2 (ACE2), a SARS-CoV-2 Spike Receptor-Binding Domain, in Epithelial Cells. _Plants (Basel, Switzerland)_, 2020. https://europepmc.org/article/PMC/PMC7355681 - Martínez-Abad A, Ramos M, Hamzaoui M, Kohnen S, Jiménez A, Garrigós MC. Optimisation of Sequential Microwave-Assisted Extraction of Essential Oil and Pigment from Lemon Peels Waste. _Foods (Basel, Switzerland)_, 2020. https://europepmc.org/article/PMC/PMC7603390 _Educational reference only — not medical advice. Essential oils are not intended to diagnose, treat, cure or prevent any disease._