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Is CBD effective against anxiety? What the science says

Dr en Pharmacie

Popular but also controversial, does CBD really have beneficial effects on reducing stress and short-term anxiety? Several studies have looked into the subject.

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CBD and anxiety
✓ WHO ARE WE?
An editorial team specializing in nutrition. Authors of the book Beneficial Foods (Mango Editions) and the podcast Food Revolutions.

Cannabidiol, more commonly called CBD, is a natural compound found in the hemp or cannabis plant. Like THC (tetrahydrocannabinol), that well-known molecule responsible for the psychoactive and euphoric effects of cannabis consumption.

Même s’il peut être victime de la mauvaise réputation du cannabis, le CBD n’est pourtant pas considéré comme un psychotrope ou un stupéfiant. Vous pouvez le retrouver en vente libre sur internet ou dans des boutiques spécialisées, en vrac, sous forme d’huile, de gélules ou même d’infusions. 

On le recommande bien souvent pour ses effets relaxants ainsi que pour soulager la douleur. Mais est-il vraiment efficace pour lutter contre le stress et l’anxiété passagère ? Je décrypte avec vous ce que dit la science à ce sujet. 

📚 Lire aussi | Notre sélection et analyse des meilleures huiles de CBD sur le marché

How can the relaxing effects of CBD be explained?

Neurotransmitters involved in mood regulation

The mechanisms of anxiety are often linked to a dysfunction of the limbic system, that is, the amygdala, the hippocampus, and the hypothalamus.

Ainsi que d’un déséquilibre des neurotransmetteurs qui jouent un rôle prépondérant dans la gestion des humeurs. 

Les molécules les plus concernées sont la sérotonine (l’hormone du bonheur), mais aussi le GABA et la noradrénaline. 

CBD’s action on these neurotransmitters

Although the mechanisms of action of CBD are not completely understood, the plant would partly owe its relaxing effects to its ability to modulate those same neurotransmitters

Il agirait notamment à deux niveaux. 

According to these studies, CBD would have an agonist action at serotonin 5-HT1A receptors, meaning that it would mimic the natural action of molecules in our body.

Entre autres, il favoriserait une plus grande libération de l’hormone du bonheur, qui est directement impliquée dans le bien-être et la gestion de l’humeur. 

CBD would also improve the GABAergic system, which would reduce neuronal excitability related to stress and anxiety.

CBD anxiety
CBD is available as oil, capsules, or gummies

A significant reduction in anxiety

Effect on generalized social anxiety disorder

There are numerous promising studies that show the positive effects of CBD on temporary anxiety as well as in patients with clinical anxiety. 

This study, a double-blind trial, revealed that 10 men with generalized social anxiety disorder (SAD) who consumed an oral dose of 400 mg of CBD showed a significant reduction in anxiety compared to placebo.

Moreover, neuroimaging results suggested that CBD intake may have affected the modulation of limbic and paralimbic brain regions.

Compared with anti-anxiety medications

Cette autre étude a comparé l’effet du CBD (300 mg) à celui de médicaments anxiolytiques comme le diazépam et l’ipsapirone lors d’un test de prise de parole en public. Le CBD a montré une réduction significative de l’anxiété après le test. 

Effects not proportional to the ingested dose

One interesting fact: research has shown that the relaxing effect is not proportional to the dose of CBD taken.

Une prise de 300 mg de CBD semble être la plus efficace pour réduire l’anxiété chez les volontaires sains, face à une prise de 100 mg et de 900 mg. À fort dosage, le CBD pourrait donc être contre-productif. 

Some precautions for use

It is recommended to start with a low dose, and adjust gradually according to your needs.

CBD is not a medication and is not intended to replace medical treatments. Before using it, I strongly recommend talking to a healthcare professional. 

Indeed, CBD could have drug interactions with certain treatments that have a narrow therapeutic window. 


Sources and scientific studies

  1. Russo EB et al., Agonistic properties of cannabidiol at 5-HT1a receptors, 2005
  2. Crippa JA et al., Neural basis of anxiolytic effects of cannabidiol (CBD) in generalized social anxiety disorder: a preliminary report, 2011
  3. Effects of ipsapirone and cannabidiol on human experimental anxiety, A. W. Zuardi et al., 1993
  4. Inverted U-Shaped Dose-Response Curve of the Anxiolytic Effect of Cannabidiol during Public Speaking in Real Life, Zuardi et al., 2017