CBD oil has become one of the most popular forms of cannabidiol in France. Taken sublingually, it is often touted as having a faster effect than other formats. But what explains this rapid action, and how long do the effects last? Here's what you need to know.
Understanding hemp and its cannabinoids
Hemp ( Cannabis sativa ) is a plant that has been used for centuries for its fibers, seeds, and traditional properties. It contains various cannabinoids, the best known of which are CBD (cannabidiol) and THC (tetrahydrocannabinol).
CBD is being studied for its relaxing potential and does not produce a psychoactive effect, unlike THC , which is responsible for the psychoactive effects of cannabis. CBD is not considered a narcotic and is not associated with a risk of addiction.
CBD oil is generally composed of cannabidiol extract derived from hemp, diluted in a carrier oil (such as avocado or sweet almond oil). As CBD is considered a "novel food" in Europe, no specific health claims can currently be made for it, whether related to stress, pain, or sleep.
Why does CBD oil work so quickly?
When CBD oil drops are placed under the tongue, the oral cavity, rich in small blood vessels, allows some of the cannabidiol to be absorbed directly into the bloodstream without passing through the digestive system. This method of administration is associated with better bioavailability compared to traditional ingestion, and the effects are generally felt more quickly, often within 15 to 20 minutes, depending on the individual.
To promote absorption, it is generally advised to hold the drops under the tongue for about 60 seconds before swallowing.
The endocannabinoid system
CBD interacts with the endocannabinoid system, a network of receptors found throughout the body (brain, nervous system, immune system). CB1 receptors are primarily located in the brain and central nervous system, while CB2 receptors are predominantly found in the immune system. This system is involved in regulating many bodily functions, but the precise role of CBD in this regulation is still being researched.
How long do the effects last?
The duration of effects felt after sublingual administration varies from person to person, but is generally between 2 and 6 hours according to user testimonials. Several factors can influence this duration: individual metabolism and profile, the dosage used (a higher dosage may be associated with a stronger or longer-lasting effect), the quality of the product (organic hemp extracted using clean methods such as supercritical CO₂ generally has a higher concentration of cannabinoids), and the regularity of consumption, which can influence the perceived duration of the effects.
How to properly use CBD oil sublingually?
For those wishing to try CBD oil, it is generally recommended to start slowly, with one to three drops, and then gradually adjust the dose based on how they feel. Each body reacts differently to CBD depending on its metabolism, weight, and overall health, so it is important to pay attention to your own reactions rather than relying on the experiences of others.
The sublingual route remains the method generally associated with the fastest onset of effects. Other formats (capsules, infusions) can be used, but the time before the effects appear will generally be longer, as the product must then pass through the digestive system.
How to choose a quality CBD oil?
Several criteria are used to assess the quality of CBD oil: the organic origin of the hemp, the extraction method (supercritical CO₂ extraction is considered a clean method), the availability of certificates of analysis from an independent laboratory, and compliance with French regulations regarding THC content (less than 0.3%). These elements are generally indicated on the packaging or available on the manufacturer's website.
Precautions for use
CBD oil is not a substitute for medical treatment. Pregnant or breastfeeding women, as well as individuals taking medication, should consult a healthcare professional before consuming CBD due to potential interactions with certain medications. CBD products are intended for adults only.
Frequently asked questions about CBD oil and its immediate effect
How many drops of CBD oil should I take to feel an effect quickly?
The number of drops depends on each person's weight, tolerance, and sensitivity. It is advisable to start with one to three drops, then adjust gradually according to how you feel.
Why does CBD oil work faster than other forms of consumption?
Sublingual administration allows partial absorption of CBD directly into the bloodstream, without passing through the digestive system, which can accelerate the onset of effects compared to conventional oral administration.
How long do the effects last after sublingual administration?
According to user testimonials, the effects felt generally last between 2 and 6 hours, depending on individual metabolism, dosage and product quality.
Can CBD oil help you sleep better?
CBD does not have any official health claims regarding sleep. Some people report a calming effect in the evening, but it is recommended to consult a healthcare professional for any persistent sleep problems.
What are the criteria for choosing a quality CBD oil?
It is recommended to favour hemp from organic farming, a clean extraction method such as supercritical CO₂, traceability of batches with analyses in independent laboratory, and compliance with the legal limit of THC (0.3% maximum).
June 2026 update: As of May 15, 2026, CBD products intended for ingestion (oils, gummies, candies, infusions, food supplements) are no longer authorized for sale in France under the European Novel Food Regulation. An appeal is currently pending before the Council of State; this article will be updated depending on the outcome.