Hemp extract composition
Pro Research Analysisby 
Searched over 200M research papers
Hemp Extract Composition: Cannabinoids, Terpenes, and Bioactive Compounds
Cannabinoid Content in Hemp Extracts
Hemp extracts are rich in cannabinoids, with cannabidiol (CBD) often being the predominant compound, especially in extracts from leaves and inflorescences, where it can reach up to 64.56% of volatile constituents . The extraction method significantly affects cannabinoid profiles: supercritical CO2 extraction yields the highest variety and abundance of cannabinoids, with CBD concentrations ranging from 12.8 to 20.6 mg/g, and can reach up to 449 mg/g in some cases 24. Ethanol extraction favors the extraction of acidic cannabinoids like cannabidiolic acid (CBDA), with levels between 3.2 and 4.1 mg/g . Commercial hemp seed oils also contain cannabinoids such as CBDA (4.25–91.6 mg/kg), Δ9-tetrahydrocannabinol (THC, up to 5.29 mg/kg), and tetrahydrocannabinolic acid (THCA, up to 5.00 mg/kg) . Spent material from hydrodistillation can also be a source of cannabinoids, with CBD concentrations up to 16% by weight .
Terpenoid and Essential Oil Composition
Terpenes are another major group of compounds in hemp extracts. β-caryophyllene is often the most abundant terpene, with concentrations up to 46.64% in essential oils and 25–42 mg/g in hydrodistilled extracts 12. Other significant terpenes include α-pinene (up to 20.25%), α-humulene (up to 11.48%), and caryophyllene oxide (up to 14.53%) 15. Hydrodistillation yields the greatest variety and abundance of terpenes, while supercritical CO2 extraction results in fewer terpenes but more cannabinoids . Microwave-assisted extraction can increase CBD content in essential oils while maintaining high yields of terpenes . Commercial hemp seed oils also contain terpenes such as α-pinene and β-pinene .
Polyphenols, Carotenoids, and Other Bioactive Compounds
Hemp extracts are notable for their polyphenol content, which varies depending on the plant part and extraction method. Aqueous extracts of hemp leaves can yield up to 9.76 mg gallic acid equivalents (GAE)/g of polyphenols, with pelargonin being the most abundant . Total phenolic content in extracts can range from 187.9 to 924.7 mg/L GAE, with the highest values in flower extracts . Hemp seed oil extracted with optimized solvent mixtures is rich in phenolics (226.43 mg GAE/kg), tocopherols (458.61 mg/kg), phytosterols (6299.44 mg/kg), carotenoids (19.92 mg/kg), and chlorophylls (66.59 mg/kg) . Ascorbic acid and carotenoids are also present in significant amounts in leaf extracts (282.23 μg/g and 356.98 μg/g, respectively) .
Protein and Functional Compound Profiles
Hemp protein isolates (HPI) can be extracted using various methods, which influence their composition and functional properties. Salt extraction yields higher protein content and solubility compared to alkaline extraction, and also affects the volatile compound profile . Reverse micelles extraction allows for direct extraction from non-defatted hemp flour, maintaining similar protein composition and functional properties, with a higher content of aromatic compounds in non-defatted samples .
Influence of Extraction Methods on Composition
The choice of extraction method—such as supercritical CO2, hydrodistillation, ethanol, microwave-assisted, or solvent mixtures—has a major impact on the chemical profile of hemp extracts. Supercritical CO2 is best for cannabinoid-rich extracts, hydrodistillation for terpene-rich extracts, and ethanol for acidic cannabinoids 245. Solvent mixtures can optimize the extraction of bioactive compounds in hemp seed oil, improving both yield and quality . Extraction parameters like temperature, duration, and solvent ratio also play a crucial role in maximizing the yield of specific compounds 36.
Conclusion
Hemp extract composition is highly diverse and depends on the plant part, extraction method, and processing conditions. Key components include cannabinoids (especially CBD and CBDA), terpenes (notably β-caryophyllene and α-pinene), polyphenols, carotenoids, tocopherols, phytosterols, and proteins. The extraction technique determines the relative abundance of these compounds, making method selection critical for targeting specific bioactive profiles for food, pharmaceutical, or industrial applications 1234+6 MORE.
Sources and full results
Most relevant research papers on this topic