What does « full spectrum » mean in a CBD oil?

A full-spectrum oil is produced by an extraction that preserves all of hemp's active compounds: CBD, the majority component, the minor cannabinoids (CBG, CBN, CBC, CBDA, CBGA), the terpenes (myrcene, limonene, linalool, beta-caryophyllene), the flavonoids including the cannflavins specific to hemp, and traces of delta-9-THC at ≤ 0.30% in the finished product. It is the format closest to the plant's natural composition; the extraction methods used, supercritical CO2 or pharmaceutical ethanol, capture these compounds without introducing contaminants.

Full spectrum contains all cannabinoids with THC at ≤ 0.30% and the terpenes preserved. Broad spectrum keeps all cannabinoids except THC, brought below 0.01%, with the terpenes preserved. Isolate contains only pure CBD at 99% or more, with no THC and no terpenes. The choice between these three formats depends on your usage profile and your exposure to anti-doping or roadside testing.

The main commercial argument for full spectrum is the entourage effect hypothesis: the idea that the co-extracted minor cannabinoids and terpenes modulate the action of CBD on its own. Formalised by researcher Ethan Russo in 2011, this hypothesis remains under scientific investigation. Controlled clinical trials comparing full spectrum and isolate at the same doses remain rare, and no European authority has approved a health claim linked to the entourage effect. The legal consequence: no French brand can state that a full spectrum is "more effective" than an isolate.

Full spectrum has been authorised for sale since the Conseil d'État ruling of 29 December 2022, provided the hemp variety is listed in the official catalogue and the delta-9-THC level does not exceed 0.30% in the finished product. The oil must contain no banned cannabinoid (HHC, H4CBD, THCP), classified as narcotics by the ANSM in June 2024. Since 15 May 2026, the DGAL has been applying the Novel Food regulation strictly: oils sold as food supplements without European authorisation are withdrawn from the market. The EFSA has published a provisionally safe daily dose of around 2 mg/day for a 70 kg adult, to be compared with the usual 15-50 mg in a commercial oil dose.

The traces of THC in a full spectrum, even within the legal threshold, can be enough to make a roadside saliva test positive: the Court of Cassation confirmed this on 21 June 2023. If you drive regularly, prefer an isolate or a certified THC-free broad spectrum. The certificate of analysis (CoA) from an accredited independent laboratory (Cofrac, ISO 17025) remains the only reliable document: it must show the actual CBD level, the full cannabinoid profile, the THC level and the absence of contaminants.

Is full spectrum "better" than isolate?

No controlled clinical study demonstrates this. The argument rests on the entourage effect hypothesis, still under investigation, with no health claim recognised by the European authorities.

Why does full spectrum have a stronger taste?

Because it retains hemp's terpenes, volatile aromatic compounds that give the plant its smell and vegetal taste. An isolate, with no terpenes, is entirely neutral.

Does a full spectrum make you "high"?

No. At less than 0.30% THC, a full spectrum produces no intoxicating effect. Users report a feeling of relaxation, without altered consciousness.

Is full spectrum advised against for pregnant women?

Yes, as with any CBD product. In June 2025 ANSES proposed to ECHA that CBD be classified as presumed toxic for human reproduction; the precautionary principle applies.

For a more detailed comparison of full spectrum and isolate, read our article on [full spectrum vs CBD isolate](/blog/spectre-complet-vs-isolat-cbd). For dosing guidance, see [how much CBD to take](/blog/quelle-quantite-de-cbd-prendre-reperes-usage).