Extraction and distillation: what is the difference for CBD?
Terms such as CO₂ extraction, cannabis extract and CBD distillate appear frequently in descriptions of CBD products. However, they do not mean the same thing. Understanding their differences helps readers interpret manufacturing statements and ask more precise questions.
The short answer: extraction from plant material uses a suitable extraction agent to dissolve substances out of it. Distillation separates components of a mixture by evaporation followed by condensation. Both processes can be used within a production sequence, but they serve different purposes. [1–3]
Quick navigation: Extraction · CO₂ as a solvent · Distillation · Purity and THC · Questions to ask · Frequently asked questions · Sources
What does extraction mean in the context of cannabis?
Here, extraction means transferring selected constituents from plant material into an extraction agent, producing an extract. Which substances are collected and in what proportions depends on factors including the starting material and the process.
For example, an original paper by Rovetto and Aieta investigated the production of cannabinoid-containing extracts using supercritical CO₂. It considered different conditions and the use of ethanol as an additional solvent. This illustrates that ‘CO₂-extracted’ describes a family of processes, not an invariably identical composition. [2]
The description alone therefore does not establish which cannabinoids are present in the finished product. Nor does it establish whether further processing follows the extraction itself.
What is the role of CO₂ in extraction?
CO₂ means carbon dioxide. In supercritical CO₂ extraction, it serves as a solvent under suitable pressure and temperature conditions. ‘Supercritical’ describes a physical state above the critical temperature and critical pressure.
In 2025, Baldino and co-authors investigated the extraction of a CBG-rich cannabis cultivar. Their work showed that the arrangement of separation steps also influenced which constituents were collected together. Under the conditions studied, plant waxes could play a role alongside cannabinoids, for example. [1]
Terminology matters: CO₂ extraction does not mean ‘without a solvent’. CO₂ itself performs that role. Whether other solvents are also used and how subsequent processing is carried out must be described separately for the particular process. [1, 2]
What happens during distillation?
Distillation exploits differences in how components of a mixture vaporise. Constituents enter the vapour phase and are then collected again as liquid. This collected fraction is called a distillate. The Royal Society of Chemistry explains this principle using simple separation examples. [3]
Specialised methods are also used for cannabinoid-containing mixtures. In 2023, Sagili and co-authors investigated short-path molecular distillation of previously obtained cannabis oil. The aim was to separate cannabinoid-rich fractions, a different task from the initial extraction from the plant. [4]
‘CBD distillate’ therefore describes a CBD-containing material stream obtained or refined by distillation. The name alone establishes neither that it contains only CBD nor that every CBD distillate has the same composition.
Why can extraction and distillation be used together?
A schematic example illustrates the difference: first, constituents are transferred from plant material into an extract. That extract can then undergo further separation. If distillation is used for this separation, extraction and distillation are different steps within the same processing sequence. [2, 4]
This is not a universal manufacturing specification. Not every extract is distilled, and the two terms alone do not describe a complete process. A sequence of process names also does not establish which formulation will eventually be bottled.
For consumers, this distinction is particularly useful: the manufacture of a starting ingredient and the composition of the finished product offered are related but different questions.
Is a distillate automatically pure or THC-free?
No. A process name does not replace an investigation of composition. ‘Distilled’ describes processing, whereas ‘THC-free’ is intended as a statement about a particular constituent. Whether THC is detectable and in what amount must be assessed analytically.
The work of the US National Institute of Standards and Technology (NIST) illustrates the importance of reliable measurements: reference materials were developed for cannabinoids and certain undesirable elements to help assess laboratory measurements. This contributes to measurement quality; it is not testing or certification of individual Parmorcan® products. [5]
A cannabinoid test report also answers only the questions actually investigated. A reported CBD value, for example, does not automatically establish that every conceivable contaminant was tested as well. Assessment requires considering the sample, scope of testing and results together.
Our article Reading a cannabinoid test report: what mg/g, mg/ml and % mean explains how to read the units.
Five questions for clear manufacturing information
The following questions help separate different statements instead of treating one technical term as a comprehensive quality judgement:
What was processed? Does the description refer to plant material, an obtained extract or the finished product?
Which process is meant? Does it explain extraction, subsequent separation or both?
What composition information is given? Are specific constituents and their amounts stated, or only general process terms?
What does a test result relate to? Does it concern the starting material described or the tested finished-product sample?
Which question remains unanswered? Missing information should be treated as an open question, rather than replaced with assumptions.
For more help distinguishing individual terms, see our introductions to cannabidiol (CBD) and cannabigerol (CBG).
Frequently asked questions about extraction and distillation
Are a CO₂ extract and a distillate the same?
No. The terms refer to different aspects of processing. A CO₂ extract may subsequently undergo distillation, but the word ‘extract’ alone does not establish that this further processing occurred.
Is distillation better than extraction?
That is not a meaningful blanket comparison. The processes serve different purposes. A more informative question is whether the manufacturing description, declared composition and appropriate test results fit together transparently.
Does a manufacturing process establish a health effect?
No. A process-engineering investigation describes how substances are obtained or separated. On its own, it is not clinical evidence of efficacy for a finished consumer product. The papers discussed here are therefore not used as evidence of product effects.
Conclusion: read process, composition and evidence separately
Extraction and distillation are not synonyms. Distinguishing them helps readers understand manufacturing descriptions. Assessing a particular product additionally requires clear composition information and matching investigations, rather than merely an impressive-sounding process name.
Sources and technical context
This article explains general chemical and analytical principles. It does not describe Parmorcan®'s complete production chain and provides no manufacturing instructions, ingestion recommendations or medical advice. The sources were checked on 18 October 2026; the experimental findings are not extrapolated to our products.
Baldino, L.; Zanotti, A.; Scognamiglio, M.; Reverchon, E. (2025): Cannabigerol Extraction from a Cannabis Cultivar Using a Supercritical Carbon Dioxide Process. Chemical Engineering & Technology, 48(7), e70052. DOI: 10.1002/ceat.70052.
Rovetto, L. J.; Aieta, N. V. (2017): Supercritical carbon dioxide extraction of cannabinoids from Cannabis sativa L. The Journal of Supercritical Fluids, 129, 16–27. DOI: 10.1016/j.supflu.2017.03.014.
Royal Society of Chemistry: Simple distillation – practical videos. Official teaching material about the general separation principle; not a cannabis or product study.
Sagili, S. U. K. R. et al. (2023): Optimization of wiped-film short path molecular distillation for recovery of cannabinoids from cannabis oil using response surface methodology. Industrial Crops and Products, 195, 116442. DOI: 10.1016/j.indcrop.2023.116442.
National Institute of Standards and Technology (2024; updated 2025): NIST’s New Hemp Reference Material Will Help Ensure Accurate Cannabis Measurements. Official explanation of reference materials and measurement quality; not product-specific testing.
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