Category: CBD Basics

What Are Terpenes, and Do They Actually Do Anything?

By Sarah Miletich 6 min read

Terpenes are the aromatic compounds that give plants their smell. Pine smells like pine because of pinene. Lavender smells like lavender because of linalool. Citrus peel smells like citrus because of limonene. Hemp contains well over a hundred of them, and they can be present in hemp extracts depending on the type of extract and how it is processed.

That much is uncontroversial. What terpenes do in a hemp product, beyond smell and taste, is one of the most oversold subjects in this industry, and it is worth being straight about where the evidence stands.

We test for what is in our products and publish the testing results. This article is about what those compounds are and what can honestly be said about them.

The common terpenes in hemp

Terpene   Smells like Also found in
Myrcene Earthy, musky, slightly sweet Hops, mango, lemongrass
Limonene Citrus peel Lemon, orange, juniper
Linalool Floral, soft Lavender, coriander
Beta-caryophyllene Peppery, woody Black pepper, cloves
Pinene Pine, fresh Pine needles, rosemary, basil
Terpinolene Fresh, herbal, faintly floral Nutmeg, apples, tea tree

 

If you have ever noticed that two hemp extracts smell noticeably different, the terpene profile is usually why. 

The entourage effect, honestly

The "entourage effect" is the idea that cannabinoids and terpenes work better together than separately, that a whole-plant extract does something an isolated compound cannot.

It is a plausible hypothesis with a real mechanistic basis. It is not a settled finding, and the industry talks about it as though it were.

Here is the actual state of play. A 2021 paper in Scientific Reports found that certain cannabis terpenes are cannabimimetic and can selectively enhance cannabinoid activity, evidence in favour. A 2020 study found that terpenoids from cannabis do not mediate an entourage effect by acting at cannabinoid receptors, evidence against, at least by that mechanism. A comprehensive 2024 review concluded that while exploratory research suggests terpenes influence the therapeutic effects of cannabinoids, the potential for synergistic or additive enhancement remains unproven and further clinical trials are needed.

So: an open question with results pointing in both directions, and no confirmed clinical entourage effect in humans.

There is one specific finding worth knowing because it cuts against the marketing. Myrcene has demonstrated anti-inflammatory properties applied topically, but in combination with CBD, it did not show a significant additional difference. That is the shape of a lot of this research: individual terpenes are interesting on their own, and the combination claim is the one that keeps failing to demonstrate itself.

What is actually claimed about individual terpenes

Exploratory research has associated specific terpenes with specific effects, myrcene with relaxation, linalool with sleep, limonene with analgesia, caryophyllene with cold tolerance and pain response.

Two caveats that matter more than the list:

"Exploratory" is doing real work in that sentence. Much of this is preclinical, in cell models or animals, often at concentrations far above what you would encounter in a consumer product.

Concentration is the whole game. The amount of any single terpene in a few drops of a hemp tincture is very small. Attributing a felt effect to a trace quantity of one terpene is not a claim the evidence supports. If you find lavender relaxing, you are more likely responding to the smell, which is a real and well-documented pathway, just not the one being sold.

What we will and will not say

We put this plainly because the alternative is the vague language that makes this category hard to trust.

We will say: terpenes can contribute to the smell and taste of hemp extracts when they are present. Their presence depends on the type of extract and how it is processed. We test for what is in the bottle and publish it.

We will not say: that the terpenes in our products produce a specific therapeutic effect, or that an entourage effect in our formulation has been demonstrated. Our products do not contain terpenes, and there is no confirmed clinical entourage effect in ours or anyone's.

If a brand tells you their terpene profile is engineered for a particular outcome, ask what evidence supports that at the concentration in the bottle. It is a fair question and it does not usually get a good answer.

Terpenes, and why "broad spectrum" means something

Where terpenes genuinely matter for a buying decision is in understanding what is and is not present in an extract.

An isolate is a single isolated cannabinoid, such as CBD, and does not contain terpenes or other naturally occurring plant compounds. It cannot properly be described as full or broad spectrum. Broad spectrum generally refers to an extract containing multiple cannabinoids, with THC removed; it does not, by itself, tell you whether terpenes are present. Full spectrum refers to an extract containing the broader range of naturally occurring cannabinoids and other compounds, including trace THC.

The type of extract also matters. Crude extracts will contain terpenes, while isolates will not. Distillates and crudes can be formulated or processed to produce either broad-spectrum or full-spectrum products depending on what compounds are retained or removed.

Proof products are broad spectrum and do not contain terpenes. The honest argument for that is not a proven entourage effect. It is that you get multiple cannabinoids rather than an isolate, without THC, which matters if you are subject to drug testing or simply do not want it. Terpenes are not necessary to make a product broad spectrum, and their presence is more a matter of extract composition, sensory characteristics, or personal preference than a demonstrated therapeutic advantage.

Frequently asked questions

Are terpenes psychoactive? Not in the intoxicating sense. Aromatic compounds can influence mood through smell, which is a genuine effect and a different one.

Do terpenes show up on a drug test? No. Drug tests screen for THC metabolites.

Does an isolate work less well than broad spectrum? There is no confirmed clinical evidence that the difference produces different outcomes. It is a reasonable preference; it is not a demonstrated fact.

Can I add terpenes to my CBD oil? We would not recommend buying isolated terpenes to add to a finished product. They are potent, some are skin and mucosal irritants at concentration, and you would be dosing blind.

Do terpenes degrade over time? Yes, they are volatile, and they are usually the first thing you notice going. If a bottle smells markedly weaker than when you bought it, see our guide to CBD shelf life and storage.

Sources

This article is for general information and is not medical advice. CBD is not approved by the FDA to diagnose, treat, cure or prevent any disease.

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Last updated: September 15, 2026

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