Dosage is one of the most frequently asked questions among people new to CBD oil. Unlike medication, there is no single, universally applicable dosage: the ideal amount varies depending on weight, individual sensitivity, the oil's concentration, and the desired effect. Here's a practical guide to safely finding your optimal dose.
Why does the dosage of CBD oil vary from person to person?
CBD (cannabidiol) is a natural molecule extracted from hemp, with no psychotropic effects or risk of addiction. It acts via the endocannabinoid system, the sensitivity of which varies significantly from one individual to another. Several factors influence the effective dose:
- Body weight : the higher the weight, the higher the dose needed to achieve a similar effect tends to be.
- The concentration of the oil : a 10% oil contains 10 mg of CBD per ml, or approximately 0.5 mg per drop. A 20% oil contains twice that amount. Therefore, two different products may require a very different number of drops for the same mg dose.
- Individual sensitivity : some people respond to very low doses (5 mg), others need 30 to 40 mg to feel an effect.
- The objective : managing occasional stress generally requires lower doses than managing chronic pain or severe sleep disorders.
- Acquired tolerance : over time, a slight tolerance may develop, requiring the dose to be increased.
It is important to remember that CBD is classified as a "Novel Food" in Europe: no official health claims have yet been validated by the relevant authorities. The data presented here reflects common usage and available scientific literature, not medical recommendations.
How to calculate your dosage in mg according to your weight?
The most commonly used rule of thumb in the literature is to start with 1 to 6 mg of CBD per 10 kg of body weight , depending on the intensity of the desired effect:
- Mild effect (occasional stress, general relaxation): 1 to 2 mg / 10 kg
- Moderate effect (chronic anxiety, mild sleep disorders): 3 to 4 mg / 10 kg
- Strong effect (chronic pain, severe insomnia): 5 to 6 mg / 10 kg
Concrete examples for a person weighing 70 kg:
- Mild effect: 7 to 14 mg/day
- Moderate effect: 21 to 28 mg/day
- Strong effect: 35 to 42 mg/day
The EFSA (European Food Safety Authority) recommends not exceeding 70 mg per day from all sources for an adult. In practice, do not exceed 50 mg daily without medical advice.
How many drops depending on the concentration of your oil?
This is where many consumers get confused. The concentration of the oil directly determines the number of drops needed to reach your target dose. On average, one drop of CBD oil is approximately 0.05 ml. Here is a reference table:
- 5% oil : approximately 2.5 mg of CBD per ml → ~0.125 mg per drop → for 10 mg: approximately 80 drops (impractical, concentration too low)
- 10% oil : approximately 10 mg of CBD per ml → ~0.5 mg per drop → for 10 mg: approximately 20 drops
- 20% oil : approximately 20 mg of CBD per ml → ~1 mg per drop → for 10 mg: approximately 10 drops
- 30% oil : approximately 30 mg of CBD per ml → ~1.5 mg per drop → for 10 mg: approximately 7 drops
A more concentrated oil isn't necessarily "stronger": it simply means you need fewer drops to achieve the same dose. To learn more about the differences between available formulas, our article "Which CBD Oil to Choose" details all the essential criteria.
How to take CBD oil?
The sublingual route is the recommended method for optimal absorption. Place the desired number of drops directly under the tongue using the dropper, hold them there for 60 seconds, and then swallow. This area is richly vascularized: the CBD is absorbed directly into the bloodstream without passing through the digestive system, allowing the effects to be felt within 15 to 45 minutes.
If the bitterness of cannabidiol is bothersome, the drops can be mixed into a beverage (herbal tea, juice) or food. In this case, absorption is slower (1 to 2 hours) and bioavailability is reduced due to liver function. To learn more about the ideal time to take your oil, see our article on when to take CBD during the day .
The gradual approach: the golden rule
Whatever your situation, always start with a low dose and increase it gradually. Here is the recommended protocol:
- Week 1 : 5 to 10 mg per day (morning or evening depending on your goal).
- Week 2-3 : if the effect is insufficient, increase by 5 mg.
- Week 4 and beyond : adjust in 5 mg increments until you find your effective dose.
Keep a log (dose, time, how you felt) to objectively record your observations. If you are taking medication (anticoagulants, antidepressants, antiepileptics), consult your doctor before introducing CBD: interactions via cytochrome P450 enzymes have been documented. For sleep disorders specifically, our article on natural remedies for insomnia offers complementary approaches. For stress management, our article on CBD and anxiety details the available data.
Regarding the regulatory framework, ANSES publishes reference information on cannabidiol and its Novel Food status in France .
Frequently asked questions about CBD oil dosage
Is it possible to overdose on CBD oil?
No fatal CBD overdose cases have been documented in the medical literature. The WHO considers CBD to be well-tolerated at high doses. However, excessive doses can cause adverse effects such as drowsiness, nausea, diarrhea, and dry mouth. Stay below 50 mg daily without medical advice and always increase the dose gradually.
How long does it take to find the optimal dosage?
Generally, allow 2 to 4 weeks of gradual adjustments to determine your effective dose. The response to CBD often improves with regular use: the effects on chronic stress or sleep disorders are assessed over several weeks, not after a single dose.
Should the dosage be adjusted according to the desired effect?
Yes. For occasional relaxation, low doses (5 to 15 mg) are usually sufficient. For chronic pain or severe insomnia, higher doses (20 to 40 mg) may be necessary. Some people split their dose into two daily intakes (morning and evening) to maintain a stable CBD level in the body.
Updated June 2026: 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.
Sources
- EFSA (2019). Safety of cannabidiol as a novel food. efsa.europa.eu
- Millar SA et al. (2019). A Systematic Review on the Pharmacokinetics of Cannabidiol in Humans. Frontiers in Pharmacology.
- ANSES. CBD (cannabidiol). anses.fr