Updated October 2026
When you shop for CBD you will see three terms: full spectrum, broad spectrum and isolate. They describe what else from the hemp plant is in the product alongside CBD.
Full spectrum CBD
Full spectrum extracts contain CBD plus a wide range of other natural hemp compounds, such as minor cannabinoids, terpenes and plant waxes. They can also contain trace amounts of THC. In the UK, THC and other controlled cannabinoids are strictly limited, so full spectrum products need careful testing.
Broad spectrum CBD
Broad spectrum extracts keep many of the other hemp compounds but are processed to remove THC. They sit between full spectrum and isolate.
CBD isolate
Isolate is CBD on its own, typically 98% to 99% pure, with other hemp compounds removed. It has very little taste or smell.
What is the "entourage effect"?
You may read that full spectrum products work better because of an "entourage effect" between hemp compounds. This is a theory that researchers are still exploring; it has not been proven.
Why regulators are focusing on high-purity CBD
In September 2026, the first three CBD products recommended by the Food Standards Agency for novel food authorisation were all high-purity CBD of at least 98%. Purified ingredients are easier to test and characterise consistently, which is why regulators have looked at them first.
Which should you choose?
- Choose based on taste preference and clear labelling.
- Make sure the label states the CBD per serving.
- Stay within the FSA's guidance of 10mg of CBD a day.
This article is for general information only and is not medical advice. CBD products sold in the UK are food supplements or cosmetics, not medicines, and are not intended to diagnose, treat, cure or prevent any disease. The Food Standards Agency (FSA) advises healthy adults to take no more than 10mg of CBD per day from all sources. Do not use CBD if you are pregnant, breastfeeding or trying to conceive, and speak to your GP or pharmacist first if you take any medication.
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