Full-Spectrum vs Breed-Spectrum vs Isolaat

The Three Extract Types: What Each Contains

CBD Isolate: Pure cannabidiol at 99%+ purity. All other plant compounds — minor cannabinoids, terpenes, flavonoids, fatty acids — are removed during processing. Isolate contains zero THC, zero terpenes, and provides no entourage effect whatsoever. It is the cheapest extract type to produce. Research consistently shows isolates require significantly higher doses to achieve outcomes comparable to full-spectrum products.

Broad-Spectrum CBD: Contains a range of cannabinoids and terpenes but with THC selectively removed through additional chromatography or distillation. Offers a partial entourage effect — better than isolate, but incomplete because the THC removal process inevitably strips away some other beneficial compounds. Broad-spectrum products are marketed to consumers who want some entourage benefit but must avoid THC entirely due to drug testing or strict jurisdictional rules.

Full-Spectrum CBD: Preserves the complete phytochemical profile of the hemp plant — CBD, minor cannabinoids (CBG, CBC, CBN), terpenes, flavonoids, fatty acids, and trace THC (≤0.2% in EU-compliant products). The trace THC is pharmacologically insufficient to produce psychoactive effects but sufficient to contribute to the entourage effect. This is the extract type supported by the strongest scientific evidence for efficacy.

The Evidence: Why Full-Spectrum Outperforms Isolate

The 2015 Lautenberg Center study remains the strongest preclinical evidence for full-spectrum superiority. Researchers compared CBD isolate against a CBD-rich full-spectrum extract in mouse models of pain and inflammation. The full-spectrum extract provided superior relief at equivalent CBD doses and demonstrated a bell-shaped dose-response curve — effectiveness increased with dose up to an optimal point. The isolate showed a narrow therapeutic window that actually decreased in effectiveness at higher doses. This study has been cited in over 800 subsequent papers.

A 2013 Pharmacology & Pharmacy study demonstrated that sub-psychoactive THC concentrations, combined with CBD and other cannabinoids, produced superior analgesia compared to CBD alone — without the adverse effects of higher THC doses. This finding directly supports the rationale for retaining trace THC in full-spectrum products rather than stripping it out.

The economic reality: CBD isolate is dramatically cheaper to produce than full-spectrum extract. The isolation process begins with a crude extract — often from low-cost outdoor hemp — that is then refined through winterisation, filtration, and chromatography. What remains is a single molecule. Full-spectrum extraction requires higher-quality input material, gentler processing, and more sophisticated equipment. The price difference between full-spectrum and isolate products reflects genuine differences in production cost — and genuine differences in therapeutic value.

How to Choose: A Decision Framework

Choose Full-Spectrum if: You want the maximum entourage effect supported by the strongest scientific evidence; you are not subject to sensitive drug testing; you live in a country where trace THC (≤0.2%) is clearly legal; and you prioritise therapeutic efficacy over the lowest possible price. This is Heffernan's Hemp's recommended choice for the vast majority of consumers.

Choose Broad-Spectrum if: You must avoid THC entirely due to drug testing requirements (workplace, sports, legal); you live in a country with zero-THC rules (Sweden, Netherlands); or you have a specific sensitivity or objection to even trace cannabinoids. Understand the trade-off: partial entourage effect, less research support, higher cost than isolate.

Choose Isolate if: You must guarantee zero THC exposure; you are subject to the most stringent drug testing protocols; or cost is your primary concern. Understand the trade-off: no entourage effect, research suggests higher doses required, no minor cannabinoids or terpenes unless artificially added back.

Will full-spectrum CBD make me fail a drug test?

Standard drug tests screen for THC metabolites, not CBD. At EU-compliant THC levels (≤0.2%), the risk of a positive test from full-spectrum CBD is very low but not theoretically zero at very high daily doses. If you are subject to sensitive or frequent drug testing, consider broad-spectrum or isolate.

Is broad-spectrum as good as full-spectrum?

No. Broad-spectrum offers a partial entourage effect because THC and some other compounds lost during THC removal are absent. The research evidence is weaker for broad-spectrum than for full-spectrum products.