Broad-spectrum CBD, full-spectrum, and CBD isolate – what is the difference?

What Is CBD Isolate?

CBD isolate consists primarily of highly purified cannabidiol. Cannabidiol is a cannabinoid that occurs naturally in Cannabis sativa. The WHO scientific review describes CBD as a chemical compound with the molecular formula C₂₁H₃₀O₂.

The producer separates and purifies CBD from a plant extract, often using chromatographic methods that separate CBD from other cannabinoids. A scientific study shows how researchers have used centrifugal partition chromatography to isolate CBD and CBDA from plant material.

An isolate should therefore not be described as a broad plant extract. A real raw material sample may still contain small amounts of closely related substances, and the laboratory measures the purity and reports which other cannabinoids are present in the sample.

Read more in the WHO Critical Review of Cannabidiol and in the openly published study on chromatographic isolation of CBD and CBDA.

What is broad-spectrum CBD?

Broad-spectrum CBD designates an extract in which the producer retains several cannabinoids or other plant substances but removes or reduces THC. Unlike an isolate, such an extract should show more than one single dominant cannabinoid in the analysis.

There is no uniform international definition that all producers follow. Two products with the same designation may therefore have different cannabinoid profiles. One may contain several minor cannabinoids in measurable amounts, while the other in practice consists almost entirely of CBD.

In a 2024 study, researchers analyzed commercial CBD products with the labels “full spectrum”, “broad spectrum”, and “CBD isolate”. They compared the product claims with laboratory results and found that the labeling did not always correspond to the measured composition.

Read the study on labeling accuracy and contamination in commercial CBD products.

What is full-spectrum?

Full-spectrum is used for extracts in which the producer retains a broader selection of the plant’s original constituents. This may include CBD, minor cannabinoids, terpenes, and other substances that the extraction process carries over from the plant material.

Unlike broad-spectrum, full-spectrum products may contain measurable amounts of THC. Exact content varies with raw material, extraction method, and subsequent purification, and each product needs to be assessed based on its own analysis and the documentation applicable in the market.

A scientific article on the difference between botanical full-spectrum extracts and CBD isolates describes plant extracts as complex mixtures, while isolates consist of a highly purified individual constituent.

Read the review Differentiating Full-Spectrum Hemp Extracts from CBD Isolates.

Comparison between CBD isolate, broad-spectrum, and full-spectrum

The table describes typical differences. The laboratory result determines how a specific product should be described, and a name on the label does not replace an actual analysis.

What does a cannabinoid profile show?

A cannabinoid profile shows which cannabinoids the laboratory has examined and which concentrations are present in the analyzed sample. Common analytes are CBD, CBDA, CBDV, CBG, CBGA, CBN, CBC, delta-9-THC, delta-8-THC, and THCA.

The profile is crucial when a product is marketed as broad- or full-spectrum. The analysis should show the composition the product name suggests. If almost all cannabinoid content consists of CBD and other substances are below the reporting limit, the profile instead resembles an isolate.

Laboratories commonly use liquid chromatography to separate and measure cannabinoids. AOAC International has approved an LC-DAD method for quantification of cannabinoids in plant material, concentrates, and oils. Sample preparation, calibration, reference standards, and reporting limits affect how the result should be interpreted.

Read more about the AOAC official method of analysis for cannabinoids in hemp.

What Do LOD and LOQ Mean?

LOD means limit of detection. It describes the lowest level at which the laboratory can distinguish an analyte’s signal from background noise.

LOQ means limit of quantification. It describes the lowest level at which the laboratory can state an amount with sufficient precision.

The phrasing “not quantified above LOQ” is therefore more accurate than a categorical claim that a product is completely free of the substance.

Eurachem publishes internationally used guidance on method validation and reporting limits. Read the Eurachem guide to the validation of analytical methods.

How to check a COA for CBD

COA stands for Certificate of Analysis. A useful certificate clearly shows which sample the laboratory analyzed, which method was used, and which results were reported.

Check the following:

• sample name or product name
• batch number or other sample identification
• analysis date
• the laboratory’s name and any accreditation
• analysis method
• analyzed cannabinoids
• units of results
• LOD and LOQ
• whether the certificate applies to the raw material or the finished product

The last point is most important. A raw material certificate shows the extract’s composition but does not verify the concentration in a finished oil blend, as that depends on how the raw material has been weighed and mixed.

A step-by-step walkthrough is available in our guide on how to read a CBD certificate of analysis.

When product labeling and analysis do not match

Several studies show that commercial cannabinoid products sometimes deviate from the declared concentration or the label’s description. A systematic research review identified labeling discrepancies and contaminants in cannabinoid products on regulated markets.

Researchers have also analyzed commercial products and compared both concentration claims and the categories isolate, broad-spectrum, and full-spectrum. Supporting the product category with analytical control is therefore more meaningful than relying on the designation.

For a buyer, this means one simple thing: request the certificate and read the cannabinoid profile. If it shows only CBD above the reporting limit, the product is in practice an isolate, regardless of what the packaging says.

Read the systematic review on cannabinoid product labeling accuracy.

What our broad-spectrum raw material looks like

We publish the certificate of analysis for the raw material used in our CBD oils, so that the profile can be checked against the reasoning above. The analysis is performed by LabCore in Ljubljana, a laboratory accredited by the European Medicines Agency as a CRO and analytically GMP-certified.

The sample is identified as CBD Distillate Broad Spectrum, certificate B2B-RCoA-225/1, analyzed with UPLC–PDA.

The profile shows seven cannabinoids in addition to CBD in quantifiable amounts. This is the composition a broad-spectrum extract should have, and it differs clearly from an isolate where essentially everything except CBD is below the reporting limit. The analysis therefore supports the designation on the label.

Open certificate of analysis B2B-RCoA-225/1.

Also read our guide on how 10%, 25%, and 50% differ or compare the products in the complete CBD range.

Frequently asked questions about broad-spectrum CBD, full-spectrum, and isolate

Is CBD isolate the same thing as broad-spectrum CBD?

No. An isolate consists primarily of purified CBD, while a broad-spectrum extract contains several cannabinoids or other plant substances.

What is the difference between broad-spectrum and full-spectrum?

Both are more complex than an isolate. Broad-spectrum is used for extracts in which the producer has removed or reduced THC, while full-spectrum may contain measurable amounts of THC.

How can I see if an extract is truly broad-spectrum?

Look at the cannabinoid profile in the certificate of analysis. A broad-spectrum extract should show several cannabinoids in quantifiable amounts, not just CBD. Our raw material reports, for example, CBN, CBG, CBT, CBDV, CBDB, CBC, and CBL in addition to CBD.

Why is the CBD concentration lower in broad-spectrum than in isolate?

An isolate is purified to almost only CBD and is often over 98%. In a broad-spectrum extract, part of the material consists of other cannabinoids, which gives a lower CBD proportion without implying inferior quality.

Are the designations legally standardized?

Not uniformly for all product categories and markets. The product name therefore needs to be supported by analytical results and correct labeling.

Does the text “THC-free” prove that the concentration is zero?

No. Check the certificate of analysis. A result below LOD or LOQ does not prove an absolute zero concentration, but that the substance could not be quantified above the laboratory’s reporting limit.

Can a raw material COA be used for the finished oil?

It describes the raw material and verifies the raw material type. It does not verify the finished oil’s concentration after dilution.

Summary

CBD isolate consists primarily of purified cannabidiol. Broad-spectrum designates extracts with several cannabinoids in which the producer has removed or reduced THC. Full-spectrum describes a broader botanical extract that may contain THC.

The market does not always use the designations consistently. A clear cannabinoid profile, correct sample identification, and reported reporting limits therefore say more than the product name.

Our published raw material analysis reports 79.83% CBD plus seven additional cannabinoids, with all THC forms below the limit of quantification. This is a broad-spectrum profile. The certificate applies to the distillate and not the finished blended bottles, which we report openly.