Terpenes are aromatic, volatile compounds that give cannabis, and many other plants, their smell and flavor. They are not what gets you high; THC is. Terpenes may shape how a high feels, but the human research on that is still small, and the “entourage effect” idea behind it is still a hypothesis.
What are terpenes?
The Bee Mine Lab page describes terpenes as “aromatic and volatile organic compounds present in the vast majority of plants,” responsible for a plant’s aroma, smell and flavor. They are a very large group. A 2019 review in Planta calls terpenes and isoprenoids “the largest class of secondary metabolites.”
Cannabis is one plant that makes them. The Bee Mine Lab page says the cannabis plant “does not produce exclusive terpenes”: the terpenes it contains are also found in other plants. Terpenes sit in the same resin glands as cannabinoids, but they are a separate group. The NCCIH cannabis fact sheet names THC and CBD as “the main cannabinoids.”
Terpene chart: aroma, where they are found, claimed effects and evidence
This chart lists six common terpenes. The “claimed or studied effect” column names who makes the claim. The last column says what kind of study stands behind it. From strongest to weakest, the levels are: human trial, human review, animal and lab research, and marketing claim.
| Terpene | Aroma | Also found in | Claimed or studied effect (who says) | Best evidence and its level |
|---|---|---|---|---|
| Myrcene | Used as a flavoring and aroma agent (myrcene review) | Hops and cannabis (myrcene review); thyme and mango (Bee Mine Lab page) | Analgesic, anti-inflammatory, and promoting relaxation and sleep (Bee Mine Lab page) | A review of myrcene says its benefits have shown up in “many animal studies” and that “studies conducted in humans is lacking.” Level: animal and lab research. |
| Limonene | Lemony (Bee Mine Lab page) | Lemon, orange, grapefruit and bergamot; some mint and rosemary (Bee Mine Lab page) | Immunostimulant, anxiolytic, antidepressant, and good for digestion (Bee Mine Lab page) | A 2024 human study titled “Vaporized D-limonene selectively mitigates the acute anxiogenic effects of Δ9-tetrahydrocannabinol in healthy adults who intermittently use cannabis.” Level: one human trial. |
| Linalool | Floral (Fluent blog) | Bergamot, jasmine and lavender (Fluent blog) | Anxiolytic, sedative, anticonvulsant and anti-inflammatory (Bee Mine Lab page) | No human trial of linalool is listed here. Level: marketing claim only. |
| Beta-caryophyllene | Herbal (Fluent blog) | Black pepper, hops, cloves and basil (Bee Mine Lab page) | Analgesic and anti-inflammatory; acts like a cannabinoid (Bee Mine Lab page) | A 2008 paper in PNAS titled “Beta-caryophyllene is a dietary cannabinoid.” Level: research paper; read its methods to see whether the work was lab, animal or human. |
| Alpha-pinene | Piney (Fluent blog) | Pine, fir, cypress, juniper, rosemary and black pepper (Bee Mine Lab page) | Anti-inflammatory; supports breathing and attention (Bee Mine Lab page) | A 2025 study in healthy adults looked at alpha-pinene on its own and with THC. Level: human study; the paper has the results. |
| Terpinolene | Used as a flavoring agent (systematic review) | A variety of herbs (systematic review) | Antioxidant, larvicide and insecticide activities stand out in studies (systematic review) | A systematic review of 57 studies (in silico, lab and animal work). It says in vivo efficacy and safety have been poorly evaluated in preclinical and clinical trials. Level: mostly lab and animal. |
In short, human evidence for any single terpene is thin. Most of the stronger-sounding claims rest on animal or lab work, or on education pages that describe what terpenes are “said” to do.
What is the entourage effect?
The Fluent blog describes the entourage effect as “the theory that cannabinoids will interact with the body differently depending on which terpenes are present.” The idea is that terpenes and cannabinoids work together, so the same THC level might feel different in two strains with different terpene mixes.
The idea goes back to Russo’s 2011 review, which says terpenoids “may contribute meaningfully to the entourage effects of cannabis-based medicinal extracts.” The same review calls the synergy “if proven.” A 2020 review of cannabis terpenes says their interactions “have only been speculated in for the last few decades.”
So the entourage effect is a hypothesis with some human research behind parts of it. It is not a settled finding.
What do terpenes do for your high?
The FDA says that “THC is the component that produces the ‘high’ associated with marijuana use” (FDA consumer update on cannabis products). Terpenes may change how that high feels, and the human studies so far are few.
The clearest human result is the 2024 limonene study. It found that vaporized d-limonene reduced the anxiety that THC caused in healthy adults who use cannabis intermittently. The study is one small trial, and one co-author, Ethan Russo, is affiliated with CReDO Science. Read the paper’s disclosures before drawing conclusions.
A 2025 study in healthy adults also looked at alpha-pinene alone and with THC. Read its results to see what it found.
Some product education pages go further. The Bee Mine Lab page says myrcene “increases the sedative and relaxing effect of both CBD and THC.” That is a marketing claim. The myrcene review says studies in humans are lacking.
What are the negative side effects of terpenes?
Human safety data for most single terpenes is limited. The terpinolene systematic review says its in vivo efficacy and safety have been poorly evaluated. The table below covers the risks the sources do describe.
| Source of concern | What it says |
|---|---|
| Essential oils | The Bee Mine Lab page says essential oils should be diluted to avoid “poisoning or skin irritation.” |
| THC in the same product | The CDC cannabis health effects page says cannabis “negatively affects several skills required for safe driving,” and that using other substances at the same time can increase impairment. |
| CBD in the same product | NCCIH lists decreased alertness, mood changes, decreased appetite and gastrointestinal symptoms, and says CBD has been associated with liver injury and interactions with other drugs. |
Russo’s review notes that certain terpenoids, as flavour and fragrance components common to human diets, have been designated Generally Recognized as Safe. That does not establish the safety of smoking or vaping them, and human safety data on single terpenes is limited. The NCCIH fact sheet says the FDA “has not approved the cannabis plant for any medical use.” If you take other medicines, ask a pharmacist before using a product that also contains CBD. For more on how CBD and THC interact, see can cbd reverse thc effects.
Is smoking terps bad for you, and can you smoke just terpenes?
The CDC says smoked cannabis, “regardless of how it is smoked, can harm lung tissues and cause scarring and damage to small blood vessels.” That warning is about smoked cannabis, and it covers any way of smoking it.
The limonene study used vaporized d-limonene in a controlled research setting. That is not a guide to doing the same at home. Heat also matters for terpenes: the Fluent blog notes that “some terpenes are extremely sensitive to heat and cold.”
Is higher terpene content better?
A higher terpene total tells you how much of these compounds is in a sample. It does not tell you what they do. The studies in the chart tested individual terpenes, not totals. The Fluent blog links strong smell to high terpene levels, but smell describes aroma, not effect.
A study of commercial cannabis samples from six US states found that labels “do not consistently align with the observed chemical diversity.” So a label word such as sativa or indica is not a reliable guide to what is in the jar; indica vs sativa effects evidence looks at this further. If you are comparing edible products, terpenes in hemp gummies explains what a label can and cannot prove.
How do terpenes show up on labels and lab reports?
Labels often use strain names or types such as indica, sativa or hybrid. Research suggests those names are a weak guide. A genetic study of cannabis samples found that cannabis labeling “was associated with variation in a small number of terpenes,” and that sativa- and indica-labeled samples were genetically indistinct across the genome. A genetic study of marijuana and hemp found that “marijuana strain names often do not reflect a meaningful genetic identity.”
Terpene amounts appear on a batch lab report, not always on the front of the package. To read one:
- Find the batch or lot number on the package and match it to the report.
- Look for a terpene section. Check whether it lists individual terpenes, such as myrcene or limonene, or only a total.
- Check the units and the name of the lab that tested the product.
- Compare the cannabinoid numbers too. NCCIH notes that some products contain cannabinoid amounts that “differ substantially from what’s stated on their labels.”
For how this applies to edibles, read terpenes in hemp gummies.
What are terpenes in beer?
Hops contain terpenes. The myrcene review says myrcene is “a major constituent in many plant species, including hops and cannabis,” and that it is used as a flavoring and aroma agent in food and beverages. The Fluent blog says caryophyllene is also found in hops, and the Bee Mine Lab page describes humulene as characteristic of hops.
Before you buy a product with terpenes
- Check the batch lab report for a terpene section, and match the batch number to your package.
- Ask the company which lab tested the batch and how it measured terpenes. Read the terpene claims as the company’s claims.
- Check the THC and CBD amounts on the same report. NCCIH notes these can differ from the label.
- Compare any health claim against the studies in the chart above before you rely on it.
By TakeHempGummies.com Consumer Research Desk
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.