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Alpha Terpineol

α-Terpineol – PatientsCann UK Skip to main content Back to Terpenes Guide α-Terpineol alpha-Terpineol pronounced: ter-PIN-ee-ol A gentle flowery, piney scent like lilac. Linked to calm and sleep, and common in soaps and lotions. Oxygenated monoterpene Boiling point: 218°C Terpene type Oxygenated monoterpene Boiling point 218°C Primary aroma Floral Key effect Calming Aroma profile How it Smells The aroma of α-Terpineol is described as: FloralLilacPineySweetHerbal Found naturally in: Lilac, pine, cajeput oil, petitgrain, cardamom, marjoram Effects Linked Effects CalmingSleep supportAnti-inflammatory These effects are based on early-stage research in animals and cells. They are not proven in humans. Do not change your treatment based on this information. About What is α-Terpineol? Alpha-terpineol is a soft, flowery terpene with a smell often compared to lilac, with a gentle piney background. It is found in lilac flowers, in pine, and in cardamom, and it is one of the smells people find most pleasant and relaxing. It carries an oxygen atom in its structure, which gives it that rounded, almost soapy floral smell. This is why it is used so widely in cosmetics (Booth and Bohlmann, 2019). Effects in detail What the Research Says Among the things studied about alpha-terpineol, its calming and sleep-supporting quality stands out. In animal studies it has shown a sedative-like effect, and it has also been looked at for easing swelling and fighting germs (Nuutinen, 2018). These effects are seen mostly in the laboratory. They fit the relaxed feeling many people describe, but they are not yet proven in human trials. Everyday sources Where You Find it in Daily Life You meet alpha-terpineol in lilac blossom, in pine, and in many flavours and fragrances. It is one of the most common terpenes in soaps, lotions and perfumes because of its pleasant floral smell. It is also used to give a soft, sweet note to some foods and drinks. Research Key Studies Nuutinen (2018) reviewed the evidence on alpha-terpineol, describing its calming effect in animal studies and its anti-inflammatory and germ-fighting activity. Its possible part in the entourage effect has also been discussed (Russo, 2011). Its chemistry is recorded in public databases (National Center for Biotechnology Information, 2025). PreviousFenchol NextAlpha-Bisabolol Back to full Terpenes Guide Important: The information on this page is for education only. It is not medical advice. Terpene research is still in its early stages. Many studies have been done in animals, not yet in people. Always speak to your doctor before changing your treatment. PatientsCann UK does not recommend any specific cannabis product. References Nuutinen, T. (2018) ‘Medicinal properties of terpenes found in Cannabis sativa and Humulus lupulus’, European Journal of Medicinal Chemistry, 157, pp. 198-228. doi: 10.1016/j.ejmech.2018.07.076. Russo, E.B. (2011) ‘Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects’, British Journal of Pharmacology, 163(7), pp. 1344-1364. doi: 10.1111/j.1476-5381.2011.01238.x. Booth, J.K. and Bohlmann, J. (2019) ‘Terpenes in Cannabis sativa: from plant genome to humans’, Plant Science, 284, pp. 67-72. doi: 10.1016/j.plantsci.2019.03.022. National Center for Biotechnology Information (2025) PubChem Compound Database. Bethesda: U.S. National Library of Medicine. Available at: https://pubchem.ncbi.nlm.nih.gov (Accessed: 11 June 2026). Cicada Jersey (2020) Terpene Wheel. Available at: https://cicada.je/terpene-wheel/ (Accessed: 11 June 2026).

Fenchol

Fenchol – PatientsCann UK Skip to main content Back to Terpenes Guide Fenchol alpha-Fenchol, Fenchyl alcohol pronounced: FEN-kol A camphor and lemon scent from fennel and basil. Studied as a mild stimulant and germ-fighter. Oxygenated monoterpene Boiling point: 201°C Terpene type Oxygenated monoterpene Boiling point 201°C Primary aroma Camphor Key effect Germ-fighting Aroma profile How it Smells The aroma of Fenchol is described as: CamphorPineySweetLemonEarthy Found naturally in: Fennel, basil, nutmeg, aniseed, cedar, mugwort Effects Linked Effects EnergisingFights germsAntioxidant These effects are based on early-stage research in animals and cells. They are not proven in humans. Do not change your treatment based on this information. About What is Fenchol? Fenchol, sometimes called fenchyl alcohol, is the terpene that gives basil much of its sweet, slightly camphor-like smell. It also has a clean, lemony piney note and is a big part of the scent of fennel. Like cineole, fenchol carries an oxygen atom, which puts it in the group called alcohols. This gives it a softer, rounder smell than the pure pine terpenes (Booth and Bohlmann, 2019). Effects in detail What the Research Says Early laboratory research has looked at fenchol as a mild stimulant and as a substance that fights germs (Nuutinen, 2018). More recently, scientists have become interested in how fenchol behaves in the gut and brain, although this work is at a very early stage. As with most terpenes, the human evidence is still thin, so these findings are best seen as clues for future research. Everyday sources Where You Find it in Daily Life You meet fenchol most strongly in fresh basil and in fennel. It also appears in nutmeg, in aniseed, and in cedar wood. Tearing a basil leaf releases a clear burst of it. Its fresh, sweet smell means it is used in perfumes and in some flavourings. Research Key Studies Nuutinen (2018) gathered the laboratory studies on fenchol, noting its mild stimulant and germ-fighting activity in cell and animal tests. Its chemical details are recorded in public databases (National Center for Biotechnology Information, 2025). Careful human research has not yet been done. Previous1,8-Cineole Nextα-Terpineol Back to full Terpenes Guide Important: The information on this page is for education only. It is not medical advice. Terpene research is still in its early stages. Many studies have been done in animals, not yet in people. Always speak to your doctor before changing your treatment. PatientsCann UK does not recommend any specific cannabis product. References Nuutinen, T. (2018) ‘Medicinal properties of terpenes found in Cannabis sativa and Humulus lupulus’, European Journal of Medicinal Chemistry, 157, pp. 198-228. doi: 10.1016/j.ejmech.2018.07.076. Booth, J.K. and Bohlmann, J. (2019) ‘Terpenes in Cannabis sativa: from plant genome to humans’, Plant Science, 284, pp. 67-72. doi: 10.1016/j.plantsci.2019.03.022. National Center for Biotechnology Information (2025) PubChem Compound Database. Bethesda: U.S. National Library of Medicine. Available at: https://pubchem.ncbi.nlm.nih.gov (Accessed: 11 June 2026). Russo, E.B. (2011) ‘Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects’, British Journal of Pharmacology, 163(7), pp. 1344-1364. doi: 10.1111/j.1476-5381.2011.01238.x. Cicada Jersey (2020) Terpene Wheel. Available at: https://cicada.je/terpene-wheel/ (Accessed: 11 June 2026).

Cineole

1,8-Cineole – PatientsCann UK Skip to main content Back to Terpenes Guide 1,8-Cineole Eucalyptol pronounced: SIN-ee-ol The strong, fresh smell of eucalyptus. Often used to help clear the airways and sharpen focus. Oxygenated monoterpene Boiling point: 176°C Terpene type Oxygenated monoterpene Boiling point 176°C Primary aroma Eucalyptus Key effect Focus Aroma profile How it Smells The aroma of 1,8-Cineole is described as: EucalyptusFreshCoolingMintyCamphor Found naturally in: Eucalyptus, rosemary, sage, bay leaves, tea tree, mugwort Effects Linked Effects Sharpens focusEases breathingAnti-inflammatory These effects are based on early-stage research in animals and cells. They are not proven in humans. Do not change your treatment based on this information. About What is 1,8-Cineole? 1,8-cineole, also called eucalyptol, is the terpene behind the strong, fresh smell of eucalyptus. It has a cool, clearing quality that many people know from chest rubs and cold remedies. It also appears in rosemary, sage and bay leaves. Unlike the pure pine or citrus terpenes, cineole carries an oxygen atom in its structure, which is why it smells so sharp and clean (Booth and Bohlmann, 2019). Effects in detail What the Research Says Cineole is one of the better-studied plant terpenes. Research suggests it may help open the airways and ease breathing, and it is widely used in cough and cold products for this reason (Nuutinen, 2018). Some studies have also looked at whether it may help with focus and clear thinking, and at its anti-inflammatory effects. Even with this longer history, most careful studies are small, so it should not be seen as a treatment on its own. Everyday sources Where You Find it in Daily Life You meet cineole in eucalyptus and tea tree oils, in fresh rosemary and sage, and in bay leaves. It is the main active smell in many vapour rubs, throat sweets and mouthwashes. A word of care: eucalyptus oil is strong and should never be swallowed neat, especially by children. Research Key Studies Nuutinen (2018) reviewed the evidence on cineole, including its use for easing breathing and its anti-inflammatory activity. Its role in the entourage effect alongside cannabinoids has also been discussed (Russo, 2011). Its chemistry, including the oxygen in its structure, is recorded in public databases (National Center for Biotechnology Information, 2025). Previousβ-Pinene NextFenchol Back to full Terpenes Guide Important: The information on this page is for education only. It is not medical advice. Terpene research is still in its early stages. Many studies have been done in animals, not yet in people. Always speak to your doctor before changing your treatment. PatientsCann UK does not recommend any specific cannabis product. References Nuutinen, T. (2018) ‘Medicinal properties of terpenes found in Cannabis sativa and Humulus lupulus’, European Journal of Medicinal Chemistry, 157, pp. 198-228. doi: 10.1016/j.ejmech.2018.07.076. Russo, E.B. (2011) ‘Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects’, British Journal of Pharmacology, 163(7), pp. 1344-1364. doi: 10.1111/j.1476-5381.2011.01238.x. Booth, J.K. and Bohlmann, J. (2019) ‘Terpenes in Cannabis sativa: from plant genome to humans’, Plant Science, 284, pp. 67-72. doi: 10.1016/j.plantsci.2019.03.022. National Center for Biotechnology Information (2025) PubChem Compound Database. Bethesda: U.S. National Library of Medicine. Available at: https://pubchem.ncbi.nlm.nih.gov (Accessed: 11 June 2026). Cicada Jersey (2020) Terpene Wheel. Available at: https://cicada.je/terpene-wheel/ (Accessed: 11 June 2026).

Beta Pinene

β-Pinene – PatientsCann UK Skip to main content Back to Terpenes Guide β-Pinene beta-Pinene pronounced: BAY-tuh PY-neen A fresh, cooling pine scent. The partner of alpha-pinene, studied for mood, worry and memory. Monoterpene Boiling point: 166°C Terpene type Monoterpene Boiling point 166°C Primary aroma Piney Key effect Mood support Aroma profile How it Smells The aroma of β-Pinene is described as: PineyFreshWoodyCoolingResinous Found naturally in: Rosemary, basil, dill, parsley, hops, pine, cumin Effects Linked Effects Lifts moodEases worryHelps memory These effects are based on early-stage research in animals and cells. They are not proven in humans. Do not change your treatment based on this information. About What is β-Pinene? Beta-pinene is one of the two pine terpenes, the other being alpha-pinene. It smells fresh and piney with a cool, almost minty lift. It is found in rosemary, basil, dill and parsley, as well as in pine trees themselves. It is a light monoterpene, so it gives off that clean, woodland smell quickly. In cannabis the two pinenes often appear together and shape the bright, herbal top of the aroma. Effects in detail What the Research Says Research on the pinenes suggests they may support mood and help ease feelings of worry, and may have a small effect on memory and alertness (Weston-Green et al., 2021). Beta-pinene has also been studied as a substance that may help open the airways and calm swelling (Nuutinen, 2018). Most of this work is in animals or cells. It points in a hopeful direction but does not yet prove benefit in people. Everyday sources Where You Find it in Daily Life You meet beta-pinene every time you cook with rosemary, basil, dill or parsley. It is also in hops, in cumin, and of course in pine forests. Rubbing a sprig of fresh rosemary releases a strong dose of it. Its clean pine smell makes it common in cleaning products and air fresheners. Research Key Studies A 2021 review by Weston-Green and colleagues looked at pinene and linalool as possible terpene-based medicines for brain health, gathering the early evidence on mood, worry and memory. Nuutinen (2018) also describes beta-pinene’s airway and anti-inflammatory effects, and its chemistry is recorded in public databases (National Center for Biotechnology Information, 2025). PreviousAlpha-Pinene Next1,8-Cineole Back to full Terpenes Guide Important: The information on this page is for education only. It is not medical advice. Terpene research is still in its early stages. Many studies have been done in animals, not yet in people. Always speak to your doctor before changing your treatment. PatientsCann UK does not recommend any specific cannabis product. References Weston-Green, K. et al. (2021) ‘A review of the potential use of pinene and linalool as terpene-based medicines for brain health’, Frontiers in Psychiatry, 12, 583211. doi: 10.3389/fpsyt.2021.583211. Nuutinen, T. (2018) ‘Medicinal properties of terpenes found in Cannabis sativa and Humulus lupulus’, European Journal of Medicinal Chemistry, 157, pp. 198-228. doi: 10.1016/j.ejmech.2018.07.076. Booth, J.K. and Bohlmann, J. (2019) ‘Terpenes in Cannabis sativa: from plant genome to humans’, Plant Science, 284, pp. 67-72. doi: 10.1016/j.plantsci.2019.03.022. National Center for Biotechnology Information (2025) PubChem Compound Database. Bethesda: U.S. National Library of Medicine. Available at: https://pubchem.ncbi.nlm.nih.gov (Accessed: 11 June 2026). Cicada Jersey (2020) Terpene Wheel. Available at: https://cicada.je/terpene-wheel/ (Accessed: 11 June 2026).

Alpha Terpinene

α-Terpinene – PatientsCann UK Skip to main content Back to Terpenes Guide α-Terpinene alpha-Terpinene pronounced: AL-fuh ter-PIN-een A woody, citrus terpene with a medicinal edge. Best known as a strong natural antioxidant. Monoterpene Boiling point: 174°C Terpene type Monoterpene Boiling point 174°C Primary aroma Woody Key effect Antioxidant Aroma profile How it Smells The aroma of α-Terpinene is described as: WoodyCitrusMedicinalHerbalFresh Found naturally in: Marjoram, cumin, tea tree, allspice, juniper, coriander Effects Linked Effects AntioxidantAnti-microbialAnti-fungal These effects are based on early-stage research in animals and cells. They are not proven in humans. Do not change your treatment based on this information. About What is α-Terpinene? Alpha-terpinene is a terpene that smells woody and citrusy with a slightly sharp, medicinal note. It is one of the main parts of tea tree oil and gives marjoram and cumin some of their warm, herby smell. It is a light monoterpene and a close cousin of gamma-terpinene. The two often appear together in the same plants. Effects in detail What the Research Says Alpha-terpinene is one of the strongest plant antioxidants found in the laboratory. It is very good at mopping up free radicals, the harmful particles that can damage cells (Nuutinen, 2018). It is also studied for fighting germs and fungus. Because it reacts so readily with oxygen, it can change over time once a plant oil is opened. This is normal, and it is why fresh oils smell brightest. Everyday sources Where You Find it in Daily Life You meet alpha-terpinene most strongly in tea tree oil, which is used in many skincare products. It is also in the herb marjoram, the spice cumin, in allspice, and in juniper. Its clean, slightly medicinal smell means it turns up in soaps, mouthwashes and household cleaners. Research Key Studies Nuutinen (2018) reviewed the laboratory evidence on alpha-terpinene, highlighting its powerful antioxidant activity and its germ-fighting and fungus-fighting effects in cell tests. Its chemistry is recorded in public databases (National Center for Biotechnology Information, 2025). The human evidence is still at an early stage. PreviousΔ-3-Carene NextAlpha-Pinene Back to full Terpenes Guide Important: The information on this page is for education only. It is not medical advice. Terpene research is still in its early stages. Many studies have been done in animals, not yet in people. Always speak to your doctor before changing your treatment. PatientsCann UK does not recommend any specific cannabis product. References Nuutinen, T. (2018) ‘Medicinal properties of terpenes found in Cannabis sativa and Humulus lupulus’, European Journal of Medicinal Chemistry, 157, pp. 198-228. doi: 10.1016/j.ejmech.2018.07.076. Booth, J.K. and Bohlmann, J. (2019) ‘Terpenes in Cannabis sativa: from plant genome to humans’, Plant Science, 284, pp. 67-72. doi: 10.1016/j.plantsci.2019.03.022. National Center for Biotechnology Information (2025) PubChem Compound Database. Bethesda: U.S. National Library of Medicine. Available at: https://pubchem.ncbi.nlm.nih.gov (Accessed: 11 June 2026). Russo, E.B. (2011) ‘Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects’, British Journal of Pharmacology, 163(7), pp. 1344-1364. doi: 10.1111/j.1476-5381.2011.01238.x. Cicada Jersey (2020) Terpene Wheel. Available at: https://cicada.je/terpene-wheel/ (Accessed: 11 June 2026).

Delta 3 Carene

Δ-3-Carene – PatientsCann UK Skip to main content Back to Terpenes Guide Δ-3-Carene Delta-3-Carene, 3-Carene pronounced: KAIR-een A sweet, piney, citrus scent from pine and cedar trees. Studied for calming and for excess fluid. Monoterpene Boiling point: 169°C Terpene type Monoterpene Boiling point 169°C Primary aroma Piney Key effect Calming Aroma profile How it Smells The aroma of Δ-3-Carene is described as: PineySweetCitrusCedarEarthy Found naturally in: Pine, cedar, rosemary, basil, bell pepper, cypress Effects Linked Effects CalmingBone supportDries excess fluid These effects are based on early-stage research in animals and cells. They are not proven in humans. Do not change your treatment based on this information. About What is Δ-3-Carene? Delta-3-carene is a terpene with a sweet, piney smell and a hint of citrus and damp earth. It is found in pine and cedar trees, in rosemary and basil, and even in bell peppers. It is a light monoterpene, so its fresh, resinous scent lifts off quickly. In cannabis it adds to that classic forest-like smell that many people enjoy. Effects in detail What the Research Says In animal studies, delta-3-carene has shown a calming, sedative-like quality (Nuutinen, 2018). Researchers have also explored whether it may help dry up extra fluid in the body, and some early work has looked at its possible role in bone health. These are early laboratory findings. One thing to note is that, in large amounts, carene can be drying and may irritate the eyes or throat, which is why balance matters. Everyday sources Where You Find it in Daily Life You will find delta-3-carene in pine and cedar forests, in fresh rosemary and basil, in cypress, and in sweet bell peppers. Pine and cedarwood essential oils are rich in it. Its piney, woody smell makes it popular in cleaning products and air fresheners that aim for a fresh-forest scent. Research Key Studies The review by Nuutinen (2018) summarised the laboratory evidence on delta-3-carene, including its calming effect in animal tests and early interest in bone health. Its chemical make-up is listed in public databases (National Center for Biotechnology Information, 2025). As with other terpenes, careful human research is still needed. PreviousLimonene Nextα-Terpinene Back to full Terpenes Guide Important: The information on this page is for education only. It is not medical advice. Terpene research is still in its early stages. Many studies have been done in animals, not yet in people. Always speak to your doctor before changing your treatment. PatientsCann UK does not recommend any specific cannabis product. References Nuutinen, T. (2018) ‘Medicinal properties of terpenes found in Cannabis sativa and Humulus lupulus’, European Journal of Medicinal Chemistry, 157, pp. 198-228. doi: 10.1016/j.ejmech.2018.07.076. Booth, J.K. and Bohlmann, J. (2019) ‘Terpenes in Cannabis sativa: from plant genome to humans’, Plant Science, 284, pp. 67-72. doi: 10.1016/j.plantsci.2019.03.022. National Center for Biotechnology Information (2025) PubChem Compound Database. Bethesda: U.S. National Library of Medicine. Available at: https://pubchem.ncbi.nlm.nih.gov (Accessed: 11 June 2026). Russo, E.B. (2011) ‘Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects’, British Journal of Pharmacology, 163(7), pp. 1344-1364. doi: 10.1111/j.1476-5381.2011.01238.x. Cicada Jersey (2020) Terpene Wheel. Available at: https://cicada.je/terpene-wheel/ (Accessed: 11 June 2026).

Valencene

Valencene – PatientsCann UK Skip to main content Back to Terpenes Guide Valencene (+)-Valencene pronounced: VAL-en-seen Smells like sweet Valencia oranges. A larger terpene studied for easing swelling and protecting skin. Sesquiterpene Boiling point: 274°C Terpene type Sesquiterpene Boiling point 274°C Primary aroma Citrus Key effect Anti-inflammatory Aroma profile How it Smells The aroma of Valencene is described as: CitrusSweetOrangeFruityFresh Found naturally in: Valencia oranges, grapefruit and other citrus fruit Effects Linked Effects Anti-inflammatorySkin protectionInsect repellent These effects are based on early-stage research in animals and cells. They are not proven in humans. Do not change your treatment based on this information. About What is Valencene? Valencene is named after the Valencia orange, the fruit it was first found in. It carries a sweet, juicy citrus smell and is the terpene behind much of the lovely aroma of fresh oranges and grapefruit. Unlike the lighter citrus terpenes, valencene is a sesquiterpene, which means it is a larger and heavier molecule. Its boiling point at normal pressure is high, around 274 degrees, although it is often measured at about 123 degrees under reduced pressure in the laboratory (National Center for Biotechnology Information, 2025). Effects in detail What the Research Says Early research has looked at valencene as an anti-inflammatory, meaning it may help calm swelling, and as a substance that could help protect skin from sun damage in laboratory tests (Nuutinen, 2018). It is also studied as a natural insect repellent. These uses are promising but early. Most of the evidence comes from cell and animal studies rather than trials in people. Everyday sources Where You Find it in Daily Life You meet valencene every time you peel a sweet orange or a grapefruit. It is concentrated in the oil of the peel, which is why citrus zest smells so strong and sweet. It is also used in the food and drink industry to add a natural orange flavour, and in some skincare products. Research Key Studies Reviews of plant and cannabis terpenes, including Nuutinen (2018), describe valencene mainly for its anti-inflammatory and skin-protecting activity seen in laboratory work. Its chemistry, including the way its boiling point changes with pressure, is recorded in public databases (National Center for Biotechnology Information, 2025). Human evidence is still limited. Previousγ-Terpinene NextLimonene Back to full Terpenes Guide Important: The information on this page is for education only. It is not medical advice. Terpene research is still in its early stages. Many studies have been done in animals, not yet in people. Always speak to your doctor before changing your treatment. PatientsCann UK does not recommend any specific cannabis product. References Nuutinen, T. (2018) ‘Medicinal properties of terpenes found in Cannabis sativa and Humulus lupulus’, European Journal of Medicinal Chemistry, 157, pp. 198-228. doi: 10.1016/j.ejmech.2018.07.076. Booth, J.K. and Bohlmann, J. (2019) ‘Terpenes in Cannabis sativa: from plant genome to humans’, Plant Science, 284, pp. 67-72. doi: 10.1016/j.plantsci.2019.03.022. National Center for Biotechnology Information (2025) PubChem Compound Database. Bethesda: U.S. National Library of Medicine. Available at: https://pubchem.ncbi.nlm.nih.gov (Accessed: 11 June 2026). Russo, E.B. (2011) ‘Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects’, British Journal of Pharmacology, 163(7), pp. 1344-1364. doi: 10.1111/j.1476-5381.2011.01238.x. Cicada Jersey (2020) Terpene Wheel. Available at: https://cicada.je/terpene-wheel/ (Accessed: 11 June 2026).

Gamma Terpinene

γ-Terpinene – PatientsCann UK Skip to main content Back to Terpenes Guide γ-Terpinene gamma-Terpinene pronounced: GAM-uh ter-PIN-een A woody citrus terpene found in lemon and lime peel. Studied as a natural antioxidant. Monoterpene Boiling point: 183°C Terpene type Monoterpene Boiling point 183°C Primary aroma Citrus Key effect Antioxidant Aroma profile How it Smells The aroma of γ-Terpinene is described as: WoodyCitrusFreshLemonHerbal Found naturally in: Lemon and lime peel, cumin, marjoram, tea tree, allspice Effects Linked Effects AntioxidantHeart supportAnti-fungal These effects are based on early-stage research in animals and cells. They are not proven in humans. Do not change your treatment based on this information. About What is γ-Terpinene? Gamma-terpinene is a terpene that smells woody and citrusy at the same time. It is a big part of the smell of lemon and lime peel, and it helps give cumin and marjoram their warm, herby aroma. It is a light monoterpene, so it lifts off the plant easily and adds a fresh top note to the overall smell of cannabis when it is present. Effects in detail What the Research Says The most studied feature of gamma-terpinene is its antioxidant activity. In laboratory tests it can mop up harmful particles called free radicals, which may help protect cells (Nuutinen, 2018). Some animal studies have also looked at whether it may help keep blood fats such as cholesterol in a healthier range. It has been studied as an anti-fungal too. As always, these are early findings from the laboratory, not proof of benefit in people. Everyday sources Where You Find it in Daily Life Gamma-terpinene is easy to meet in everyday life. It is in the peel of lemons and limes, in the spice cumin, in the herb marjoram, and in tea tree oil. Grating a fresh lemon releases a burst of it. Because it smells fresh and citrusy, it is also used to add a clean note to soaps and household cleaners. Research Key Studies The broad review by Nuutinen (2018) collected the laboratory evidence on gamma-terpinene, highlighting its antioxidant activity and possible effects on blood fats seen in animal studies. Its chemical details are recorded in public databases (National Center for Biotechnology Information, 2025). Strong human trials have not yet been done. PreviousGeranyl-Acetate NextValencene Back to full Terpenes Guide Important: The information on this page is for education only. It is not medical advice. Terpene research is still in its early stages. Many studies have been done in animals, not yet in people. Always speak to your doctor before changing your treatment. PatientsCann UK does not recommend any specific cannabis product. References Nuutinen, T. (2018) ‘Medicinal properties of terpenes found in Cannabis sativa and Humulus lupulus’, European Journal of Medicinal Chemistry, 157, pp. 198-228. doi: 10.1016/j.ejmech.2018.07.076. Booth, J.K. and Bohlmann, J. (2019) ‘Terpenes in Cannabis sativa: from plant genome to humans’, Plant Science, 284, pp. 67-72. doi: 10.1016/j.plantsci.2019.03.022. National Center for Biotechnology Information (2025) PubChem Compound Database. Bethesda: U.S. National Library of Medicine. Available at: https://pubchem.ncbi.nlm.nih.gov (Accessed: 11 June 2026). Russo, E.B. (2011) ‘Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects’, British Journal of Pharmacology, 163(7), pp. 1344-1364. doi: 10.1111/j.1476-5381.2011.01238.x. Cicada Jersey (2020) Terpene Wheel. Available at: https://cicada.je/terpene-wheel/ (Accessed: 11 June 2026).

Geranyl-Acetate

Geranyl-Acetate – PatientsCann UK Skip to main content Back to Terpenes Guide Geranyl-Acetate Geranyl ethanoate pronounced: JER-uh-nil ASS-uh-tate A soft, sweet flower scent with a fruity twist. The smell behind many roses and geraniums. Monoterpene ester Boiling point: 245°C Terpene type Monoterpene ester Boiling point 245°C Primary aroma Floral Key effect Antioxidant Aroma profile How it Smells The aroma of Geranyl-Acetate is described as: FloralSweetFruityRoseSoft Found naturally in: Geraniums, lemongrass, coriander, carrots, roses, citronella Effects Linked Effects Protects cellsCalmingSkin care These effects are based on early-stage research in animals and cells. They are not proven in humans. Do not change your treatment based on this information. About What is Geranyl-Acetate? Geranyl-acetate is a sweet, flowery terpene with a gentle fruity edge. It is what gives geraniums and many roses their soft, pretty smell. It belongs to a group called esters, which are terpenes joined to a small acid, and esters often smell especially sweet and fruity. It has a high boiling point for a light terpene, so it lingers and does not fade as fast as sharper smells like lemon. This is one reason perfume makers like it so much. Effects in detail What the Research Says Scientists have mostly studied geranyl-acetate as an antioxidant, a substance that may help protect the body’s cells from a kind of damage called oxidative stress (Nuutinen, 2018). Some early work also looks at whether it has a gentle calming quality. There is not yet strong human research on geranyl-acetate by itself. Most of what we know comes from laboratory tests and from its long, safe history of use in food flavouring and perfume. Everyday sources Where You Find it in Daily Life You will find geranyl-acetate in geranium and rose oils, in lemongrass and citronella, and in the leaves of coriander. It is even part of the smell of carrots. If you have used a rose-scented soap or a citronella candle, you have met it. It is approved as a food flavouring and is widely used to add a sweet, floral note to drinks, sweets and cosmetics. Research Key Studies Laboratory reviews of cannabis and plant terpenes, including the broad review by Nuutinen (2018), describe geranyl-acetate mainly for its antioxidant activity seen in cell tests. Its chemical make-up, including its formula and boiling point, is listed in public databases (National Center for Biotechnology Information, 2025). Human studies are still needed to confirm any health effects. PreviousOcimene Nextγ-Terpinene Back to full Terpenes Guide Important: The information on this page is for education only. It is not medical advice. Terpene research is still in its early stages. Many studies have been done in animals, not yet in people. Always speak to your doctor before changing your treatment. PatientsCann UK does not recommend any specific cannabis product. References Nuutinen, T. (2018) ‘Medicinal properties of terpenes found in Cannabis sativa and Humulus lupulus’, European Journal of Medicinal Chemistry, 157, pp. 198-228. doi: 10.1016/j.ejmech.2018.07.076. Booth, J.K. and Bohlmann, J. (2019) ‘Terpenes in Cannabis sativa: from plant genome to humans’, Plant Science, 284, pp. 67-72. doi: 10.1016/j.plantsci.2019.03.022. National Center for Biotechnology Information (2025) PubChem Compound Database. Bethesda: U.S. National Library of Medicine. Available at: https://pubchem.ncbi.nlm.nih.gov (Accessed: 11 June 2026). Russo, E.B. (2011) ‘Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects’, British Journal of Pharmacology, 163(7), pp. 1344-1364. doi: 10.1111/j.1476-5381.2011.01238.x. Cicada Jersey (2020) Terpene Wheel. Available at: https://cicada.je/terpene-wheel/ (Accessed: 11 June 2026).

Alpha Phellandrene

α-Phellandrene – PatientsCann UK Skip to main content Back to Terpenes Guide α-Phellandrene alpha-Phellandrene pronounced: fel-AN-dreen A bright, peppery terpene with a cool, minty edge. Found in dill, fennel and mint. Monoterpene Boiling point: 171°C Terpene type Monoterpene Boiling point 171°C Primary aroma Minty Key effect Pain relief Aroma profile How it Smells The aroma of α-Phellandrene is described as: CitrusPepperyWoodyMintyFresh Found naturally in: Dill, fennel, black pepper, mint, eucalyptus, ginger grass Effects Linked Effects Eases painLifts moodAnti-inflammatory These effects are based on early-stage research in animals and cells. They are not proven in humans. Do not change your treatment based on this information. About What is α-Phellandrene? Alpha-phellandrene is a small, light terpene that gives some plants a sharp, peppery smell with a cool minty lift. It is one of the terpenes that helps make dill and fennel smell the way they do. Cannabis usually only contains it in small amounts, but it adds a fresh, spicy note to the overall aroma. Because it is a small monoterpene molecule, alpha-phellandrene evaporates quickly at room temperature (Booth and Bohlmann, 2019). That is why you can smell it straight away when you crush a fresh dill or fennel frond. Effects in detail What the Research Says Early laboratory research has looked at whether alpha-phellandrene can ease pain. Studies in animals suggest it may lower how strongly pain signals are felt, and may also help lift low mood (Nuutinen, 2018). These findings are interesting but very early, and they have not been tested properly in people. Like other terpenes, alpha-phellandrene is also being studied for the entourage effect, the idea that terpenes and cannabinoids may work better together than alone (Russo, 2011). Everyday sources Where You Find it in Daily Life You meet alpha-phellandrene most often in the kitchen. It is part of the smell of fresh dill, fennel seeds, and black pepper, and it appears in some mint and ginger plants. A few drops of dill or fennel essential oil carry a strong dose of it. It is also used in small amounts in perfumes and cleaning products because of its fresh, slightly citrus smell. Research Key Studies A 2018 review by Nuutinen gathered together the laboratory studies on terpenes found in cannabis and hops, including alpha-phellandrene, and noted possible pain-easing and mood-lifting effects seen in animal tests. Chemistry details, such as its boiling point and molecular shape, are recorded in public science databases (National Center for Biotechnology Information, 2025). As with all terpenes, the human evidence is still being gathered. PreviousTerpinolene NextOcimene Back to full Terpenes Guide Important: The information on this page is for education only. It is not medical advice. Terpene research is still in its early stages. Many studies have been done in animals, not yet in people. Always speak to your doctor before changing your treatment. PatientsCann UK does not recommend any specific cannabis product. References Nuutinen, T. (2018) ‘Medicinal properties of terpenes found in Cannabis sativa and Humulus lupulus’, European Journal of Medicinal Chemistry, 157, pp. 198-228. doi: 10.1016/j.ejmech.2018.07.076. Booth, J.K. and Bohlmann, J. (2019) ‘Terpenes in Cannabis sativa: from plant genome to humans’, Plant Science, 284, pp. 67-72. doi: 10.1016/j.plantsci.2019.03.022. Russo, E.B. (2011) ‘Taming THC: potential cannabis synergy and phytocannabinoid-terpenoid entourage effects’, British Journal of Pharmacology, 163(7), pp. 1344-1364. doi: 10.1111/j.1476-5381.2011.01238.x. National Center for Biotechnology Information (2025) PubChem Compound Database. Bethesda: U.S. National Library of Medicine. Available at: https://pubchem.ncbi.nlm.nih.gov (Accessed: 11 June 2026). Cicada Jersey (2020) Terpene Wheel. Available at: https://cicada.je/terpene-wheel/ (Accessed: 11 June 2026).