The Entourage Effect: Is It Real? What the Evidence Says About CBD

What is the entourage effect?

The term comes from a 1998 lab study by Israeli researchers, including Raphael Mechoulam, who found inactive molecules made by the body boosted 2-AG, one of the body’s own cannabinoids: a side note about the endocannabinoid system, not about hemp.

In 2011 the neurologist Ethan Russo applied it to cannabis, suggesting terpenes and minor cannabinoids might shape the effects of THC and CBD. He restated the case in 2019.

“Entourage CBD” usually means CBD sold on the theory, typically full or broad spectrum. It’s also a product name: Love CBD sells oils and capsules it calls its “Entourage” range, and describes the oils as full spectrum (its website, checked October 2026). Evopure isn’t connected with Love CBD.

Full spectrum vs broad spectrum vs isolate

The entourage effect is the main argument for full spectrum products: read what full spectrum CBD contains. Broad spectrum keeps some compounds, minus the THC; CBD isolate is CBD alone. What stays in depends on refining: see how CBD is extracted and how THC is removed and full spectrum vs broad spectrum CBD distillate.

More in full vs broad spectrum vs isolate, minor cannabinoids and CBC oil.

Is the entourage effect real? What the research shows

The evidence is mixed. Most support comes from lab, animal and observational studies, human tests point both ways, and no good trial has shown broad spectrum oil works better than isolate.

Evidence for

• Epilepsy data, 2018: pooled observational data (670 patients) found more people reported improvement on CBD-rich extracts (71%) than purified CBD (46%). But on the standard measure, a seizure drop of 50% or more, there was no difference (37% vs 42%). It wasn’t randomised, the extracts may have contained THC, and two of the three authors worked for cannabis companies.
• Terpenes in mice, 2021: four cannabis terpenes produced cannabinoid-like behaviour in mice and activated the CB1 receptor in cell tests.
• Limonene, 2024: in 20 healthy adults, inhaled limonene with a high THC dose lowered “anxious” and “paranoid” ratings versus THC alone, but nothing else.
• CBD and THC together: in some trials, THC plus CBD worked differently from THC alone, for example in migraine. See CBD for migraines.

Evidence against

• Terpenes, 2019: six of the most common cannabis terpenes, including myrcene, limonene and linalool, didn’t activate CB1 or CB2 receptors or change THC’s effect on them in a lab study.
• Pinene, 2025: in a double-blind trial of 19 adults, inhaled alpha-pinene, at and above cannabis flower levels, didn’t change any of THC’s effects, including on memory.
• Reviews: a 2020 review called the idea ill-defined and largely used for marketing. A 2023 review found the studies simple in design and contradictory. A 2024 review found limited evidence that it is a stable, predictable effect.
• Amounts: minor cannabinoids and terpenes are often present in tiny amounts in finished products, far below doses used in research.
• Prescription CBD: Epidyolex, a licensed medicine, is purified CBD and works on its own for its approved uses.

Our view: it’s a reasonable idea worth testing, not a proven reason to pick one oil over another. Choose on THC, lab testing and how much CBD you get.

Terpenes: do they make CBD work better?

Terpenes are the aromatic compounds that give plants their smell, such as limonene in citrus peel and myrcene in hops. The lab evidence conflicts: the 2019 study found common terpenes didn’t act on cannabinoid receptors, the 2021 study found some did. In people, inhaled limonene changed one THC effect and pinene none.

In a finished oil, terpenes mainly shape taste and smell (see what terpenes are). Three of our oils list a terpene blend on their product pages: Sleep is led by myrcene with caryophyllene, terpinolene and alpha-pinene; Flow uses citral, phellandrene, terpineol and beta-ocimene; Relief uses limonene, caryophyllene, humulene and alpha-pinene.

Botanicals alongside CBD: a different thing

Three of our oils add other plant extracts. That isn’t the entourage effect, which is about hemp’s own compounds, and we don’t claim the herbs work together with CBD. They’re simply ingredients:

• Flow CBD Oil: broad spectrum CBD with ashwagandha and maca. See CBD and ashwagandha.
• Sleep CBD Oil: broad spectrum CBD with passion flower.
• Relief CBD Oil: broad spectrum CBD with turmeric and black pepper extract. See CBD and turmeric.

Herbs have no authorised health claims in the UK, so we describe what’s in the bottle, not what it will do for you.

UK law and THC

Pure CBD isn’t a controlled drug in the UK, but THC is. The Home Office says CBD is nearly impossible to isolate fully, so products are likely to contain controlled cannabinoids. A product is only exempt if, among other rules, no one component part contains more than 1mg of a controlled cannabinoid, and the Home Office applies that to the whole container, not a single dose.

In the UK, full spectrum products often can’t meet these rules, so broad spectrum is the closest legal option to “whole plant” CBD. Our CBD products are broad spectrum, 0% THC, and on the FSA’s public list linked to validated novel food applications. More on the UK legal limits on THC in CBD oil.

Broad spectrum isn’t the same as CBD only. In a 2026 UK study, 31 adults took a broad spectrum product (150mg a day) for 10 weeks. No THC was found, but CBG and CBDV, both banned in sport, showed up in many urine samples. Tested at work or in sport? Read CBD and drug tests first.