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They are composed of 2 isoprene units—in other words, two blocks of 5 units. The best-known monoterpenes are myrcene, alpha- and beta-pinene (a-pinene and β-pinene), limonene, and beta-caryophyllene (β-caryophyllene), terpinolene, and ocimene.
\n\n\n\nMyrcene, or β-myrcene, is a monoterpene. It is undoubtedly the most common terpene found in the cannabis plant, as it accounts for 50% of the plant’s total essential oil production. Its aroma is a blend of earthy, musky, and grassy notes. Myrcene is the precursor to other terpenes.
\n\n\n\nA number of studies confirm that this is the dominant phytoterpene in the vast majority of Indica-dominant strains, and that it has a sedative and relaxing effect. It appears that if the plant contains a concentration of myrcene equal to or greater than 0.5%, then this effect is more pronounced. Other studies suggest that this terpene may be useful for treating insomnia. It also appears to possess anti-inflammatory, antibiotic, and antimutagenic properties.
\n\n\n\nPinen is a bicyclic monoterpene that exhibits a distinct dual aromatic character, similar to that of pine and fir. Two structural isomers occur naturally in our environment: α-pinen and β-pinen, the former being the more common of the two.
\n\n\n\nThis terpene plays a protective role for the cannabis plant, as it acts as a repellent against pests. It can also be found in many other plant species, such as parsley, rosemary, dill, basil, and conifers.
\n\n\n\nA number of scientific studies confirm that pinene has proven anti-inflammatory, bronchodilator, and even anticancer properties. A clinical study conducted in 2011 demonstrated that α-pinene acts as an acetylcholinesterase inhibitor and is capable of modulating the activity of this enzyme, which may contribute to improved memory and cognitive function.
\n\n\n\nThat is why we can conclude that it has the potential to mitigate the effects of THC. Most cannabis strains with high pinene content generally produce an energizing effect.
\n\n\n\nLimonene is a monocyclic monoterpene, which explains why certain cannabis strains offer that delicious, intense citrus aroma. We’ve found that strains grown from the highest-quality cannabis seeds —which contain high levels of limonene—produce an invigorating effect. This terpene is found in certain aromatic herbs such as rosemary and mint, as well as in all citrus fruits.
\n\n\n\nFrom a physiological standpoint, limonene is known for its many antibacterial, antioxidant, and antifungal properties. Psychologically, it acts as an excellent natural antidepressant, as it has the ability to significantly improve mood.
\n\n\n\nSome scientific studies suggest that this terpene may help restore homeostatic balance. Given that imbalances in neuroendocrine and immune function (which directly affect homeostasis) are directly linked to psychosomatic or psychiatric disorders, limonene may be effective in treating conditions such as depression or various anxiety disorders.
\n\n\n\nβ-Caryophyllene is a sesquiterpene found quite frequently in cannabis, as well as in basil, cloves, and cinnamon. It is responsible for the aromatic, slightly pungent, and woody character of certain strains. This logically explains why it is one of the active compounds in black pepper. This specific terpene could be considered a cannabinoid in its own right, as it selectively binds to the CB2 receptor.
\n\n\n\nTerpinolene is a terpene that is often found in a very wide range of cannabis strains, though generally in very small amounts. Strains in which terpinolene is the dominant terpene are rare. This terpene has a fairly complex sensory profile, as it can be described as a blend of woody, herbaceous, and floral notes.
\n\n\n\nIt is found in lilacs, tea trees, apples, cumin, and nutmeg. Laboratory studies—specifically those conducted on mice—have shown that inhaling it produces sedative effects. It also appears that this terpene has anticancer and antioxidant properties. Other recent scientific research is also exploring the role of terpinolenes in preventing coronary heart disease, in combination with other antioxidants.
\n\n\n\nOcimene has a mild, floral, and woody scent that is quite subtle. Like terpinolene, it is a terpene found in a very wide range of cannabis strains, though few have this aromatic compound as their dominant feature. It is also found in a wide variety of plants—such as hops, kumquats, mangoes, basil, bergamot, lavender, orchids, and even pepper—in varying amounts.
\n\n\n\nOcimene is widely used in the fragrance industry because of its sweet, floral, and herbaceous aroma profile. There is scientific evidence supporting its anti-inflammatory properties. Generally speaking, it is produced by plants to act as a powerful repellent against insect pests, and thus plays a protective role.
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They are composed of 15 carbon atoms. The sesquiterpenes most commonly found in cannabis are carene (delta-3-carene), caryophyllene oxide, fenchone, humulene, linalool, eucalyptol, bisabolol, nerolidol (or peruviole), and alpha-phellandrene (a-phellandrene), camphene, α-β-Y-terpinene, farnesene, and terpineol.
\n\n\n\nDelta-3-carene is one of the main components of pine essential oils. It is known for its properties as a phytoncide (a term used to describe a group of antimicrobial volatile organic compounds released into the air by trees and herbaceous plants); it also exhibits anti-inflammatory and anxiolytic effects. Furthermore, recent studies have shown that carene improves sleep, and that oral administration of delta-3-carene increases sleep duration and reduces sleep latency. It potentiates synaptic responses mediated by GABAA receptors by prolonging the decay time constant of inhibitory synaptic responses.
\n\n\n\nCaryophyllene oxideis a sesquiterpene epoxide whose scent can be described as fresh, sweet, dry, woody, and spicy. It is specifically a compound used by drug-sniffing dogs to identify cannabis. It interacts with the endocannabinoid system. It is commonly found in field wormwood, salt heliotrope, cinnamon, sticky sage, and basil.
\n\n\n\nFenchol has a strong, fresh aromatic profile dominated by camphor. This terpene exhibits broad-spectrum antibacterial activity and may play a role in pain relief by inhibiting the TRPA1 receptor, a key protein in the body’s pain signaling system.
\n\n\n\nHumulene is also known as α-caryophyllene (alpha-caryophyllene); it is a terpene found in hop cones. Humulene contributes significantly to the anti-inflammatory effects of cannabis. It is also considered an active mechanism in the fight against tumors, as evidenced by its ability to produce reactive oxygen species (ROS).
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Linalool is a monoterpene alcohol widely found as a major component of plant essential oils, particularly in lavender and cilantro. Linalool is not inherently toxic; in fact, it has been shown to possess a wide range of synergistic bioactive properties, including anti-inflammatory, anticancer, antihyperlipidemic, antimicrobial, antinociceptive, analgesic, and neuroprotective effects. Furthermore, linalool exerts anxiolytic and antidepressant effects via the serotonin 5-HT1A receptor.
\n\n\n\nAs its name suggests, eucalyptol has a strong, fresh, distinctive, and slightly pungent eucalyptus scent. This terpene is commonly found in eucalyptus as well as in certain varieties of orchids. Scientific studies have shown that eucalyptol has clear anti-inflammatory and analgesic properties.
\n\n\n\nBisabolol has a fairly mild scent, reminiscent of citrus and chamomile. It is found in chamomile and other natural herbs. It is a terpene widely used in the fragrance industry. Some scientific studies have shown that bisabolol has anti-inflammatory and antibacterial properties.
\n\n\n\nNerolidol is a sesquiterpene alcohol that is a major component of the essential oils of neroli, Myrocarpus fastigiatus, and Brassia volanodosa. It is also present in smaller amounts in ginger, lavender, and lemongrass. This terpene is commonly used in perfumery due to its floral, fruity, fresh, intense, and distinctive aromatic profile. It is also used in the production of eau de cologne. Nerolidol appears to possess antiseptic, energizing, and antifungal properties.
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Alpha-phellandrene has a pleasant minty and citrusy scent. It is the main component of essential oils derived from certain varieties of eucalyptus. Scientific studies show that alpha-phellandrene may have a variety of beneficial properties, such as boosting the immune system, as well as antifungal, anti-inflammatory, and analgesic properties.
\n\n\n\nCamphene is a terpene with a pungent, herbaceous odor. It is a major component of mastic gum oil. It is also found in smaller quantities in the essential oils of turpentine, cypress, camphor, lemongrass, neroli, ginger, and valerian. Camphene has cholesterol-lowering and triglyceride-lowering effects, which help improve the body’s internal regulation of cholesterol and triglycerides. It is also used in Ayurvedic medicine.
\n\n\n\nAlpha, beta, and Y-terpinene are found in allspice, eucalyptus, citrus fruits, juniper, tea tree, cardamom, and marjoram. The α (alpha) isomer is also being studied as an anticancer compound.
\n\n\n\nFarnesene has a strong, fresh, grassy, and apple-like scent. It is found in small amounts in basil, apples, mint, and ginger. Some insects use it for communication. It is also present in certain plants, which use it as a repellent against pests. Farnesene is a component used in the manufacture of tires in the automotive industry, as well as in the creation of numerous fragrances in the perfume industry. It appears to possess interesting antibacterial properties.
\n\n\n\nTerpineol is a monocyclic monoterpene alcohol found primarily in pine essential oil, as well as in other trees and certain plants (lavender, juniper, lovage, and marjoram). It is identified by its scent, which is similar to that of lily of the valley, lilac, and hyacinth. Terpineol is used in the manufacture of soaps and for other cosmetic applications. A scientific study shows that it may have beneficial effects in combating depression.
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These are the compounds found in small quantities in the cannabis plant: borneol, guaiol, cedrene, camphor, phytol, geranyl acetate, pulegone, cymene, and isopulegol (menthyl acetate).
\n\n\n\nBorneol is a monoterpene, identifiable by its menthol-like, herbaceous, and even woody scent. It is found in ginger, mugwort, artemisia, rosemary, sage, oregano, and certain types of cinnamon. It is used by industrial manufacturers to produce various insect repellents. It appears to play an important role in the entourage effect, complementing the action of other terpenes.
\n\n\n\nFrom a therapeutic standpoint, recent scientific research has reportedly shown that it is quite effective in combating apoptosis in cancer cells—in other words, it induces their natural death. Other studies indicate that it also possesses antiviral properties, as it is a powerful inhibitor of the herpes simplex virus type 1.
\n\n\n\nGuaiol is a sesquiterpene alcohol with an aromatic profile similar to that of pine, and can therefore easily be confused with pinene. It is found in certain trees, such as guaiacum, pine, and cypress. Medically, it is of interest because it has strong anti-inflammatory, antimicrobial, antibacterial, antifungal, and antiviral properties.
\n\n\n\nCedrene is a sesquiterpene found in cedar essential oil, which is extracted from the tree of the same name. This terpene is a powerful natural antiparasitic and anti-inflammatory agent.
\n\n\n\nCamphor is a bicyclic terpene derived from the camphor tree (Cinnamomum camphora). It can easily be confused with borneol, as their scents are quite similar. It is an excellent antifungal and antiparasitic agent, as it is highly effective in actively combating pathogenic fungi and repelling harmful insects. Camphor has been found to possess beneficial antiseptic, anti-inflammatory, and antimicrobial properties.
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Phytol is one of the main acyclic diterpene alcohols and a precursor to vitamins E and K. It is a very common terpene found in numerous chlorophyll-containing plants, such as green tea, as well as in milk, eggs, and petroleum sediments. It has a strong, fresh, floral, balsamic scent, which is one of the reasons it is used in the cosmetics industry. Several scientific studies have shown that it has soothing, digestive, antioxidant, anti-inflammatory, and anticarcinogenic properties and that it also strengthens the immune system.
\n\n\n\nGeranyl acetate is a monoterpene with a distinctive floral and fruity scent reminiscent of roses. It occurs naturally in lemongrass, rose, palmarosa, and cilantro oils. Geranyl acetate is widely used in cosmetics as a fragrance ingredient in the manufacture of soaps and creams. This terpene has soothing, antispasmodic, analgesic, and anti-inflammatory properties.
\n\n\n\nPulegone is a monocyclic monoterpene that gives off a strong odor reminiscent of peppermint, pennyroyal, and camphor. This terpene is used in both aromatherapy and perfumery. It can be a powerful natural insecticide against pests, but caution is advised, as it can be toxic in high concentrations. Fortunately, pulegone is present in only trace amounts in the cannabis plant.
\n\n\n\nCymene is a monoterpene with an intensely herbaceous and spicy aroma. It is commonly found in cumin and thyme essential oils. Numerous international scientific studies have shown that cymene is a powerful natural pain reliever and also possesses anti-inflammatory, antibacterial, antifungal, antiviral, and expectorant properties.
\n\n\n\nIsopulegol, or menthyl acetate, is simply a precursor to menthol; it is a monoterpene alcohol with an intensely minty aroma. It is found in pennyroyal and lemon eucalyptus. From a therapeutic standpoint, scientific studies have shown that isopulegol has analgesic, anxiolytic, relaxing, gastroprotective, and anti-inflammatory properties.
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