CBD bioavailability: the forms of use compared

Q: What does CBD bioavailability mean?

CBD bioavailability describes what share of the cannabidiol taken actually reaches the bloodstream and can therefore work at all. The bioavailability depends strongly on the form of use and decides how efficient and economical the use is. The different forms of use compared CBD bioavailability varies strongly: inhalation (a vape) reaches 30-50%, sublingual drops 13-35%, oral intake (capsules, edibles) only 4-20%, while topical use works only locally with a minimal systemic absorption.

May 05, 2026

CBD bioavailability decides how efficient and economical your use of CBD is. The different forms of use have very different rates of absorption. We explain how to get the maximum out of every drop.

What does CBD bioavailability mean?

CBD bioavailability describes what share of the cannabidiol taken actually reaches the bloodstream and can therefore work at all. The bioavailability depends strongly on the form of use and decides how efficient and economical the use is.

The different forms of use compared

CBD bioavailability varies strongly: inhalation (a vape) reaches 30-50%, sublingual drops 13-35%, oral intake (capsules, edibles) only 4-20%, while topical use works only locally with a minimal systemic absorption.

Sublingual absorption – the gold standard

Drops placed under the tongue bypass the first-pass metabolism of the liver. CBD reaches the blood directly through the oral mucous membrane. Important: hold for 60-90 seconds, then swallow. That way the optimal CBD bioavailability is reached.

Oral intake and the first-pass effect

With swallowed CBD products (capsules, gummies) a large part is already broken down in the liver before it reaches the bloodstream. That lowers the bioavailability to 4-20%. The advantage: a longer duration of effect of 6-8 hours.

Inhalation – the maximum bioavailability

With CBD vapes or vaporised CBD flower extract the active substance reaches the blood directly through the lungs. At 30-50% the bioavailability is the highest, and the effect sets in within a few minutes. The disadvantage: a shorter duration of effect of 2-3 hours.

Factors that influence the bioavailability

The carrier oil (MCT oil improves absorption), how full the stomach is (an empty stomach is optimal for sublingual use), the individual metabolism, full spectrum vs. isolate (full spectrum is better), age and body composition.

How do you maximise the bioavailability?

1) Sublingual use, holding for 60-90 seconds 2) Choose MCT oil as the carrier 3) Something rich in fat alongside (it improves absorption) 4) No drinks straight before 5) Prefer a high-grade full spectrum oil.

Liposomal CBD – the next generation

Liposomal CBD encapsulates cannabidiol in tiny fat droplets. These are absorbed better by the body, which can raise the bioavailability to up to 70%. These products are, however, more expensive.

Swiss premium oils for a maximum effect

Swiss CO₂-extracted full spectrum oils with MCT oil as the carrier guarantee a high bioavailability. An organic certificate and a laboratory analysis are essential for a traceable quality.

Frequently asked questions about CBD bioavailability

What is CBD bioavailability?

The percentage share of the CBD taken that actually reaches the bloodstream and can therefore work at all.

Which form of use has the highest bioavailability?

Inhalation (a vape) at 30-50%, followed by sublingual intake (13-35%). Swallowed products reach only 4-20%.

How can I increase the bioavailability?

Sublingual use, holding for 60-90 seconds, choosing an MCT carrier oil and eating something rich in fat alongside.

What is liposomal CBD?

CBD encapsulated in tiny fat droplets for a better absorption. The bioavailability can reach up to 70%.

Further information

In short

CBD bioavailability can be optimised considerably through correct use. High-grade Swiss premium oils with MCT oil as the carrier and sublingual use are the key to a maximum effect. Discover our wide range in the CBD Shop Switzerland or high-grade drops such as our CBD oil Swiss Extract.

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Important: our product information describes the ingredients only and is not a promise of any medical benefit. CBD products are not medicines and are no substitute for medical advice. If you have health concerns, please speak to your doctor.